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Java Assignment Operators with Examples
Operators constitute the basic building block of any programming language. Java too provides many types of operators which can be used according to the need to perform various calculations and functions, be it logical, arithmetic, relational, etc. They are classified based on the functionality they provide.
Types of Operators:
- Arithmetic Operators
- Unary Operators
- Assignment Operator
- Relational Operators
- Logical Operators
- Ternary Operator
- Bitwise Operators
- Shift Operators
This article explains all that one needs to know regarding Assignment Operators.
Assignment Operators
These operators are used to assign values to a variable. The left side operand of the assignment operator is a variable, and the right side operand of the assignment operator is a value. The value on the right side must be of the same data type of the operand on the left side. Otherwise, the compiler will raise an error. This means that the assignment operators have right to left associativity, i.e., the value given on the right-hand side of the operator is assigned to the variable on the left. Therefore, the right-hand side value must be declared before using it or should be a constant. The general format of the assignment operator is,
Types of Assignment Operators in Java
The Assignment Operator is generally of two types. They are:
1. Simple Assignment Operator: The Simple Assignment Operator is used with the “=” sign where the left side consists of the operand and the right side consists of a value. The value of the right side must be of the same data type that has been defined on the left side.
2. Compound Assignment Operator: The Compound Operator is used where +,-,*, and / is used along with the = operator.
Let’s look at each of the assignment operators and how they operate:
1. (=) operator:
This is the most straightforward assignment operator, which is used to assign the value on the right to the variable on the left. This is the basic definition of an assignment operator and how it functions.
Syntax:
Example:
2. (+=) operator:
This operator is a compound of ‘+’ and ‘=’ operators. It operates by adding the current value of the variable on the left to the value on the right and then assigning the result to the operand on the left.
Note: The compound assignment operator in Java performs implicit type casting. Let’s consider a scenario where x is an int variable with a value of 5. int x = 5; If you want to add the double value 4.5 to the integer variable x and print its value, there are two methods to achieve this: Method 1: x = x + 4.5 Method 2: x += 4.5 As per the previous example, you might think both of them are equal. But in reality, Method 1 will throw a runtime error stating the “i ncompatible types: possible lossy conversion from double to int “, Method 2 will run without any error and prints 9 as output.
Reason for the Above Calculation
Method 1 will result in a runtime error stating “incompatible types: possible lossy conversion from double to int.” The reason is that the addition of an int and a double results in a double value. Assigning this double value back to the int variable x requires an explicit type casting because it may result in a loss of precision. Without the explicit cast, the compiler throws an error. Method 2 will run without any error and print the value 9 as output. The compound assignment operator += performs an implicit type conversion, also known as an automatic narrowing primitive conversion from double to int . It is equivalent to x = (int) (x + 4.5) , where the result of the addition is explicitly cast to an int . The fractional part of the double value is truncated, and the resulting int value is assigned back to x . It is advisable to use Method 2 ( x += 4.5 ) to avoid runtime errors and to obtain the desired output.
Same automatic narrowing primitive conversion is applicable for other compound assignment operators as well, including -= , *= , /= , and %= .
3. (-=) operator:
This operator is a compound of ‘-‘ and ‘=’ operators. It operates by subtracting the variable’s value on the right from the current value of the variable on the left and then assigning the result to the operand on the left.
4. (*=) operator:
This operator is a compound of ‘*’ and ‘=’ operators. It operates by multiplying the current value of the variable on the left to the value on the right and then assigning the result to the operand on the left.
5. (/=) operator:
This operator is a compound of ‘/’ and ‘=’ operators. It operates by dividing the current value of the variable on the left by the value on the right and then assigning the quotient to the operand on the left.
6. (%=) operator:
This operator is a compound of ‘%’ and ‘=’ operators. It operates by dividing the current value of the variable on the left by the value on the right and then assigning the remainder to the operand on the left.
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The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases. See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.
Assignment, Arithmetic, and Unary Operators
The simple assignment operator.
One of the most common operators that you'll encounter is the simple assignment operator " = ". You saw this operator in the Bicycle class; it assigns the value on its right to the operand on its left:
This operator can also be used on objects to assign object references , as discussed in Creating Objects .
The Arithmetic Operators
The Java programming language provides operators that perform addition, subtraction, multiplication, and division. There's a good chance you'll recognize them by their counterparts in basic mathematics. The only symbol that might look new to you is " % ", which divides one operand by another and returns the remainder as its result.
Operator | Description |
---|---|
Additive operator (also used for String concatenation) | |
Subtraction operator | |
Multiplication operator | |
Division operator | |
Remainder operator |
The following program, ArithmeticDemo , tests the arithmetic operators.
This program prints the following:
You can also combine the arithmetic operators with the simple assignment operator to create compound assignments . For example, x+=1; and x=x+1; both increment the value of x by 1.
The + operator can also be used for concatenating (joining) two strings together, as shown in the following ConcatDemo program:
By the end of this program, the variable thirdString contains "This is a concatenated string.", which gets printed to standard output.
The Unary Operators
The unary operators require only one operand; they perform various operations such as incrementing/decrementing a value by one, negating an expression, or inverting the value of a boolean.
Operator | Description |
---|---|
Unary plus operator; indicates positive value (numbers are positive without this, however) | |
Unary minus operator; negates an expression | |
Increment operator; increments a value by 1 | |
Decrement operator; decrements a value by 1 | |
Logical complement operator; inverts the value of a boolean |
The following program, UnaryDemo , tests the unary operators:
The increment/decrement operators can be applied before (prefix) or after (postfix) the operand. The code result++; and ++result; will both end in result being incremented by one. The only difference is that the prefix version ( ++result ) evaluates to the incremented value, whereas the postfix version ( result++ ) evaluates to the original value. If you are just performing a simple increment/decrement, it doesn't really matter which version you choose. But if you use this operator in part of a larger expression, the one that you choose may make a significant difference.
The following program, PrePostDemo , illustrates the prefix/postfix unary increment operator:
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Java methods, java classes, java file handling, java how to's, java reference, java examples, java operators.
Operators are used to perform operations on variables and values.
In the example below, we use the + operator to add together two values:
Try it Yourself »
Although the + operator is often used to add together two values, like in the example above, it can also be used to add together a variable and a value, or a variable and another variable:
Java divides the operators into the following groups:
- Arithmetic operators
- Assignment operators
- Comparison operators
- Logical operators
- Bitwise operators
Arithmetic Operators
Arithmetic operators are used to perform common mathematical operations.
Operator | Name | Description | Example | Try it |
---|---|---|---|---|
+ | Addition | Adds together two values | x + y | |
- | Subtraction | Subtracts one value from another | x - y | |
* | Multiplication | Multiplies two values | x * y | |
/ | Division | Divides one value by another | x / y | |
% | Modulus | Returns the division remainder | x % y | |
++ | Increment | Increases the value of a variable by 1 | ++x | |
-- | Decrement | Decreases the value of a variable by 1 | --x |
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Java Assignment Operators
Assignment operators are used to assign values to variables.
In the example below, we use the assignment operator ( = ) to assign the value 10 to a variable called x :
The addition assignment operator ( += ) adds a value to a variable:
A list of all assignment operators:
Operator | Example | Same As | Try it |
---|---|---|---|
= | x = 5 | x = 5 | |
+= | x += 3 | x = x + 3 | |
-= | x -= 3 | x = x - 3 | |
*= | x *= 3 | x = x * 3 | |
/= | x /= 3 | x = x / 3 | |
%= | x %= 3 | x = x % 3 | |
&= | x &= 3 | x = x & 3 | |
|= | x |= 3 | x = x | 3 | |
^= | x ^= 3 | x = x ^ 3 | |
>>= | x >>= 3 | x = x >> 3 | |
<<= | x <<= 3 | x = x << 3 |
Java Comparison Operators
Comparison operators are used to compare two values (or variables). This is important in programming, because it helps us to find answers and make decisions.
The return value of a comparison is either true or false . These values are known as Boolean values , and you will learn more about them in the Booleans and If..Else chapter.
In the following example, we use the greater than operator ( > ) to find out if 5 is greater than 3:
Operator | Name | Example | Try it |
---|---|---|---|
== | Equal to | x == y | |
!= | Not equal | x != y | |
> | Greater than | x > y | |
< | Less than | x < y | |
>= | Greater than or equal to | x >= y | |
<= | Less than or equal to | x <= y |
Java Logical Operators
You can also test for true or false values with logical operators.
Logical operators are used to determine the logic between variables or values:
Operator | Name | Description | Example | Try it |
---|---|---|---|---|
&& | Logical and | Returns true if both statements are true | x < 5 && x < 10 | |
|| | Logical or | Returns true if one of the statements is true | x < 5 || x < 4 | |
! | Logical not | Reverse the result, returns false if the result is true | !(x < 5 && x < 10) |
Java Bitwise Operators
Bitwise operators are used to perform binary logic with the bits of an integer or long integer.
Operator | Description | Example | Same as | Result | Decimal |
---|---|---|---|---|---|
& | AND - Sets each bit to 1 if both bits are 1 | 5 & 1 | 0101 & 0001 | 0001 | 1 |
| | OR - Sets each bit to 1 if any of the two bits is 1 | 5 | 1 | 0101 | 0001 | 0101 | 5 |
~ | NOT - Inverts all the bits | ~ 5 | ~0101 | 1010 | 10 |
^ | XOR - Sets each bit to 1 if only one of the two bits is 1 | 5 ^ 1 | 0101 ^ 0001 | 0100 | 4 |
<< | Zero-fill left shift - Shift left by pushing zeroes in from the right and letting the leftmost bits fall off | 9 << 1 | 1001 << 1 | 0010 | 2 |
>> | Signed right shift - Shift right by pushing copies of the leftmost bit in from the left and letting the rightmost bits fall off | 9 >> 1 | 1001 >> 1 | 1100 | 12 |
>>> | Zero-fill right shift - Shift right by pushing zeroes in from the left and letting the rightmost bits fall off | 9 >>> 1 | 1001 >>> 1 | 0100 | 4 |
Note: The Bitwise examples above use 4-bit unsigned examples, but Java uses 32-bit signed integers and 64-bit signed long integers. Because of this, in Java, ~5 will not return 10. It will return -6. ~00000000000000000000000000000101 will return 11111111111111111111111111111010
In Java, 9 >> 1 will not return 12. It will return 4. 00000000000000000000000000001001 >> 1 will return 00000000000000000000000000000100
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1.7 Java | Assignment Statements & Expressions
An assignment statement designates a value for a variable. An assignment statement can be used as an expression in Java.
After a variable is declared, you can assign a value to it by using an assignment statement . In Java, the equal sign = is used as the assignment operator . The syntax for assignment statements is as follows:
An expression represents a computation involving values, variables, and operators that, when taking them together, evaluates to a value. For example, consider the following code:
You can use a variable in an expression. A variable can also be used on both sides of the = operator. For example:
In the above assignment statement, the result of x + 1 is assigned to the variable x . Let’s say that x is 1 before the statement is executed, and so becomes 2 after the statement execution.
To assign a value to a variable, you must place the variable name to the left of the assignment operator. Thus the following statement is wrong:
Note that the math equation x = 2 * x + 1 ≠ the Java expression x = 2 * x + 1
Which is equivalent to:
And this statement
is equivalent to:
Note: The data type of a variable on the left must be compatible with the data type of a value on the right. For example, int x = 1.0 would be illegal, because the data type of x is int (integer) and does not accept the double value 1.0 without Type Casting .
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- 1.1 Preface
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1.4. Expressions and Assignment Statements ¶
In this lesson, you will learn about assignment statements and expressions that contain math operators and variables.
1.4.1. Assignment Statements ¶
Remember that a variable holds a value that can change or vary. Assignment statements initialize or change the value stored in a variable using the assignment operator = . An assignment statement always has a single variable on the left hand side of the = sign. The value of the expression on the right hand side of the = sign (which can contain math operators and other variables) is copied into the memory location of the variable on the left hand side.
Figure 1: Assignment Statement (variable = expression) ¶
Instead of saying equals for the = operator in an assignment statement, say “gets” or “is assigned” to remember that the variable on the left hand side gets or is assigned the value on the right. In the figure above, score is assigned the value of 10 times points (which is another variable) plus 5.
The following video by Dr. Colleen Lewis shows how variables can change values in memory using assignment statements.
As we saw in the video, we can set one variable to a copy of the value of another variable like y = x;. This won’t change the value of the variable that you are copying from.
Click on the Show CodeLens button to step through the code and see how the values of the variables change.
The program is supposed to figure out the total money value given the number of dimes, quarters and nickels. There is an error in the calculation of the total. Fix the error to compute the correct amount.
Calculate and print the total pay given the weekly salary and the number of weeks worked. Use string concatenation with the totalPay variable to produce the output Total Pay = $3000 . Don’t hardcode the number 3000 in your print statement.
Assume you have a package with a given height 3 inches and width 5 inches. If the package is rotated 90 degrees, you should swap the values for the height and width. The code below makes an attempt to swap the values stored in two variables h and w, which represent height and width. Variable h should end up with w’s initial value of 5 and w should get h’s initial value of 3. Unfortunately this code has an error and does not work. Use the CodeLens to step through the code to understand why it fails to swap the values in h and w.
1-4-7: Explain in your own words why the ErrorSwap program code does not swap the values stored in h and w.
Swapping two variables requires a third variable. Before assigning h = w , you need to store the original value of h in the temporary variable. In the mixed up programs below, drag the blocks to the right to put them in the right order.
The following has the correct code that uses a third variable named “temp” to swap the values in h and w.
The code is mixed up and contains one extra block which is not needed in a correct solution. Drag the needed blocks from the left into the correct order on the right, then check your solution. You will be told if any of the blocks are in the wrong order or if you need to remove one or more blocks.
After three incorrect attempts you will be able to use the Help Me button to make the problem easier.
Fix the code below to perform a correct swap of h and w. You need to add a new variable named temp to use for the swap.
1.4.2. Incrementing the value of a variable ¶
If you use a variable to keep score you would probably increment it (add one to the current value) whenever score should go up. You can do this by setting the variable to the current value of the variable plus one (score = score + 1) as shown below. The formula looks a little crazy in math class, but it makes sense in coding because the variable on the left is set to the value of the arithmetic expression on the right. So, the score variable is set to the previous value of score + 1.
Click on the Show CodeLens button to step through the code and see how the score value changes.
1-4-11: What is the value of b after the following code executes?
- It sets the value for the variable on the left to the value from evaluating the right side. What is 5 * 2?
- Correct. 5 * 2 is 10.
1-4-12: What are the values of x, y, and z after the following code executes?
- x = 0, y = 1, z = 2
- These are the initial values in the variable, but the values are changed.
- x = 1, y = 2, z = 3
- x changes to y's initial value, y's value is doubled, and z is set to 3
- x = 2, y = 2, z = 3
- Remember that the equal sign doesn't mean that the two sides are equal. It sets the value for the variable on the left to the value from evaluating the right side.
- x = 1, y = 0, z = 3
1.4.3. Operators ¶
Java uses the standard mathematical operators for addition ( + ), subtraction ( - ), multiplication ( * ), and division ( / ). Arithmetic expressions can be of type int or double. An arithmetic operation that uses two int values will evaluate to an int value. An arithmetic operation that uses at least one double value will evaluate to a double value. (You may have noticed that + was also used to put text together in the input program above – more on this when we talk about strings.)
Java uses the operator == to test if the value on the left is equal to the value on the right and != to test if two items are not equal. Don’t get one equal sign = confused with two equal signs == ! They mean different things in Java. One equal sign is used to assign a value to a variable. Two equal signs are used to test a variable to see if it is a certain value and that returns true or false as you’ll see below. Use == and != only with int values and not doubles because double values are an approximation and 3.3333 will not equal 3.3334 even though they are very close.
Run the code below to see all the operators in action. Do all of those operators do what you expected? What about 2 / 3 ? Isn’t surprising that it prints 0 ? See the note below.
When Java sees you doing integer division (or any operation with integers) it assumes you want an integer result so it throws away anything after the decimal point in the answer, essentially rounding down the answer to a whole number. If you need a double answer, you should make at least one of the values in the expression a double like 2.0.
With division, another thing to watch out for is dividing by 0. An attempt to divide an integer by zero will result in an ArithmeticException error message. Try it in one of the active code windows above.
Operators can be used to create compound expressions with more than one operator. You can either use a literal value which is a fixed value like 2, or variables in them. When compound expressions are evaluated, operator precedence rules are used, so that *, /, and % are done before + and -. However, anything in parentheses is done first. It doesn’t hurt to put in extra parentheses if you are unsure as to what will be done first.
In the example below, try to guess what it will print out and then run it to see if you are right. Remember to consider operator precedence .
1-4-15: Consider the following code segment. Be careful about integer division.
What is printed when the code segment is executed?
- 0.666666666666667
- Don't forget that division and multiplication will be done first due to operator precedence.
- Yes, this is equivalent to (5 + ((a/b)*c) - 1).
- Don't forget that division and multiplication will be done first due to operator precedence, and that an int/int gives an int result where it is rounded down to the nearest int.
1-4-16: Consider the following code segment.
What is the value of the expression?
- Dividing an integer by an integer results in an integer
- Correct. Dividing an integer by an integer results in an integer
- The value 5.5 will be rounded down to 5
1-4-17: Consider the following code segment.
- Correct. Dividing a double by an integer results in a double
- Dividing a double by an integer results in a double
1-4-18: Consider the following code segment.
- Correct. Dividing an integer by an double results in a double
- Dividing an integer by an double results in a double
1.4.4. The Modulo Operator ¶
The percent sign operator ( % ) is the mod (modulo) or remainder operator. The mod operator ( x % y ) returns the remainder after you divide x (first number) by y (second number) so 5 % 2 will return 1 since 2 goes into 5 two times with a remainder of 1. Remember long division when you had to specify how many times one number went into another evenly and the remainder? That remainder is what is returned by the modulo operator.
Figure 2: Long division showing the whole number result and the remainder ¶
In the example below, try to guess what it will print out and then run it to see if you are right.
The result of x % y when x is smaller than y is always x . The value y can’t go into x at all (goes in 0 times), since x is smaller than y , so the result is just x . So if you see 2 % 3 the result is 2 .
1-4-21: What is the result of 158 % 10?
- This would be the result of 158 divided by 10. modulo gives you the remainder.
- modulo gives you the remainder after the division.
- When you divide 158 by 10 you get a remainder of 8.
1-4-22: What is the result of 3 % 8?
- 8 goes into 3 no times so the remainder is 3. The remainder of a smaller number divided by a larger number is always the smaller number!
- This would be the remainder if the question was 8 % 3 but here we are asking for the reminder after we divide 3 by 8.
- What is the remainder after you divide 3 by 8?
1.4.5. FlowCharting ¶
Assume you have 16 pieces of pizza and 5 people. If everyone gets the same number of slices, how many slices does each person get? Are there any leftover pieces?
In industry, a flowchart is used to describe a process through symbols and text. A flowchart usually does not show variable declarations, but it can show assignment statements (drawn as rectangle) and output statements (drawn as rhomboid).
The flowchart in figure 3 shows a process to compute the fair distribution of pizza slices among a number of people. The process relies on integer division to determine slices per person, and the mod operator to determine remaining slices.
Figure 3: Example Flow Chart ¶
A flowchart shows pseudo-code, which is like Java but not exactly the same. Syntactic details like semi-colons are omitted, and input and output is described in abstract terms.
Complete the program based on the process shown in the Figure 3 flowchart. Note the first line of code declares all 4 variables as type int. Add assignment statements and print statements to compute and print the slices per person and leftover slices. Use System.out.println for output.
1.4.6. Storing User Input in Variables ¶
Variables are a powerful abstraction in programming because the same algorithm can be used with different input values saved in variables.
Figure 4: Program input and output ¶
A Java program can ask the user to type in one or more values. The Java class Scanner is used to read from the keyboard input stream, which is referenced by System.in . Normally the keyboard input is typed into a console window, but since this is running in a browser you will type in a small textbox window displayed below the code. The code below shows an example of prompting the user to enter a name and then printing a greeting. The code String name = scan.nextLine() gets the string value you enter as program input and then stores the value in a variable.
Run the program a few times, typing in a different name. The code works for any name: behold, the power of variables!
Run this program to read in a name from the input stream. You can type a different name in the input window shown below the code.
Try stepping through the code with the CodeLens tool to see how the name variable is assigned to the value read by the scanner. You will have to click “Hide CodeLens” and then “Show in CodeLens” to enter a different name for input.
The Scanner class has several useful methods for reading user input. A token is a sequence of characters separated by white space.
Method | Description |
---|---|
nextLine() | Scans all input up to the line break as a String |
next() | Scans the next token of the input as a String |
nextInt() | Scans the next token of the input as an int |
nextDouble() | Scans the next token of the input as a double |
nextBoolean() | Scans the next token of the input as a boolean |
Run this program to read in an integer from the input stream. You can type a different integer value in the input window shown below the code.
A rhomboid (slanted rectangle) is used in a flowchart to depict data flowing into and out of a program. The previous flowchart in Figure 3 used a rhomboid to indicate program output. A rhomboid is also used to denote reading a value from the input stream.
Figure 5: Flow Chart Reading User Input ¶
Figure 5 contains an updated version of the pizza calculator process. The first two steps have been altered to initialize the pizzaSlices and numPeople variables by reading two values from the input stream. In Java this will be done using a Scanner object and reading from System.in.
Complete the program based on the process shown in the Figure 5 flowchart. The program should scan two integer values to initialize pizzaSlices and numPeople. Run the program a few times to experiment with different values for input. What happens if you enter 0 for the number of people? The program will bomb due to division by zero! We will see how to prevent this in a later lesson.
The program below reads two integer values from the input stream and attempts to print the sum. Unfortunately there is a problem with the last line of code that prints the sum.
Run the program and look at the result. When the input is 5 and 7 , the output is Sum is 57 . Both of the + operators in the print statement are performing string concatenation. While the first + operator should perform string concatenation, the second + operator should perform addition. You can force the second + operator to perform addition by putting the arithmetic expression in parentheses ( num1 + num2 ) .
More information on using the Scanner class can be found here https://www.w3schools.com/java/java_user_input.asp
1.4.7. Programming Challenge : Dog Years ¶
In this programming challenge, you will calculate your age, and your pet’s age from your birthdates, and your pet’s age in dog years. In the code below, type in the current year, the year you were born, the year your dog or cat was born (if you don’t have one, make one up!) in the variables below. Then write formulas in assignment statements to calculate how old you are, how old your dog or cat is, and how old they are in dog years which is 7 times a human year. Finally, print it all out.
Calculate your age and your pet’s age from the birthdates, and then your pet’s age in dog years. If you want an extra challenge, try reading the values using a Scanner.
1.4.8. Summary ¶
Arithmetic expressions include expressions of type int and double.
The arithmetic operators consist of +, -, * , /, and % (modulo for the remainder in division).
An arithmetic operation that uses two int values will evaluate to an int value. With integer division, any decimal part in the result will be thrown away, essentially rounding down the answer to a whole number.
An arithmetic operation that uses at least one double value will evaluate to a double value.
Operators can be used to construct compound expressions.
During evaluation, operands are associated with operators according to operator precedence to determine how they are grouped. (*, /, % have precedence over + and -, unless parentheses are used to group those.)
An attempt to divide an integer by zero will result in an ArithmeticException to occur.
The assignment operator (=) allows a program to initialize or change the value stored in a variable. The value of the expression on the right is stored in the variable on the left.
During execution, expressions are evaluated to produce a single value.
The value of an expression has a type based on the evaluation of the expression.
- Java Operators
Last updated: January 8, 2024
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1. Overview
Operators are a fundamental building block of any programming language. We use operators to perform operations on values and variables.
Java provides many groups of operators. They are categorized by their functionalities.
In this tutorial, we’ll walk through all Java operators to understand their functionalities and how to use them.
2. Arithmetic Operators
We use arithmetic operators to perform simple mathematical operations. We should note that arithmetic operators only work with primitive number types and their boxed types , such as int and Integer .
Next, let’s see what operators we have in the arithmetic operator group.
2.1. The Addition Operator
The addition operator (+) allows us to add two values or concatenate two strings:
2.2. The Subtraction Operator
Usually, we use the subtraction operator (-) to subtract one value from another:
2.3. The Multiplication Operator
The multiplication operator (*) is used to multiply two values or variables:
2.4. The Division Operator
The division operator (/) allows us to divide the left-hand value by the right-hand one:
When we use the division operator on two integer values ( byte , short , int , and long ), we should note that the result is the quotient value. The remainder is not included .
As the example above shows, if we calculate 15 / 2 , the quotient is 7, and the remainder is 1 . Therefore, we have 15 / 2 = 7 .
2.5. The Modulo Operator
We can get the quotient using the division operator. However, if we just want to get the remainder of a division calculation, we can use the modulo operator (%):
3. Unary Operators
As the name implies, unary operators only require one single operand . For example, we usually use unary operators to increment, decrement, or negate a variable or value.
Now, let’s see the details of unary operators in Java.
3.1. The Unary Plus Operator
The unary plus operator (+) indicates a positive value. If the number is positive, we can omit the ‘+’ operator:
3.2. The Unary Minus Operator
Opposite to the unary plus operator, the unary minus operator (-) negates a value or an expression:
3.3. The Logical Complement Operator
The logical complement operator (!) is also known as the “NOT” operator . We can use it to invert the value of a boolean variable or value:
3.4. The Increment Operator
The increment operator (++) allows us to increase the value of a variable by 1:
3.5. The Decrement Opeartor
The decrement operator (–) does the opposite of the increment operator. It decreases the value of a variable by 1:
We should keep in mind that the increment and decrement operators can only be used on a variable . For example, “ int a = 5; a++; ” is fine. However, the expression “ 5++ ” won’t be compiled.
4. Relational Operators
Relational operators can be called “comparison operators” as well. Basically, we use these operators to compare two values or variables.
4.1. The “Equal To” Operator
We use the “equal to” operator (==) to compare the values on both sides. If they’re equal, the operation returns true :
The “equal to” operator is pretty straightforward. On the other hand, the Object class has provided the equals() method. As the Object class is the superclass of all Java classes, all Java objects can use the equals() method to compare each other.
When we want to compare two objects – for instance, when we compare Long objects or compare String s – we should choose between the comparison method from the equals() method and that of the “equal to” operator wisely .
4.2. The “Not Equal To” Operator
The “not equal to” operator (!=) does the opposite of the ‘==’ operator. If the values on both sides are not equal, the operation returns true :
4.3. The “Greater Than” Operator
When we compare two values with the “greater than” operator (>), it returns true if the value on the left-hand side is greater than the value on the right-hand side:
4.4. The “Greater Than or Equal To” Operator
The “greater than or equal to” operator (>=) compares the values on both sides and returns true if the left-hand side operand is greater than or equal to the right-hand side operand:
4.5. The “Less Than” Operator
The “less than” operator (<) compares two values on both sides and returns true if the value on the left-hand side is less than the value on the right-hand side:
4.6. The “Less Than or Equal To” Operator
Similarly, the “less than or equal to” operator (<=) compares the values on both sides and returns true if the left-hand side operand is less than or equal to the right-hand side:
5. Logical Operators
We have two logical operators in Java: the logical AND and OR operators. Basically, their function is pretty similar to the AND gate and the OR gate in digital electronics.
Usually, we use a logical operator with two operands, which are variables or expressions that can be evaluated as boolean .
Next, let’s take a closer look at them.
5.1. The Logical AND Operator
The logical AND operator ( && ) returns true only if both operands are true :
5.2. The Logical OR Operator
Unlike the ‘ && ‘ operator, the logical OR operator ( || ) returns true if at least one operand is true :
We should note that the logical OR operator has the short-circuiting effect : It returns true as soon as one of the operands is evaluated as true, without evaluating the remaining operands.
6. Ternary Operator
A ternary operator is a short form of the if-then-else statement. It has the name ternary as it has three operands. First, let’s have a look at the standard if-then-else statement syntax:
We can convert the above if-then-else statement into a compact version using the ternary operator:
Let’s look at its syntax:
Next, let’s understand how the ternary operator works through a simple example:
7. Bitwise and Bit Shift Operators
As the article “ Java bitwise operators ” covers the details of bitwise and bit shift operators, we’ll briefly summarize these operators in this tutorial.
7.1. The Bitwise AND Operator
The bitwise AND operator (&) returns the bit-by-bit AND of input values:
7.2. The Bitwise OR Operator
The bitwise OR operator (|) returns the bit-by-bit OR of input values:
7.3. The Bitwise XOR Operator
The bitwise XOR (exclusive OR) operator (^) returns the bit-by-bit XOR of input values:
7.4. The Bitwise Complement Operator
The bitwise complement operator (~) is a unary operator. It returns the value’s complement representation, which inverts all bits from the input value:
7.5. The Left Shift Operator
Shift operators shift the bits to the left or right by the given number of times.
The left shift operator (<<) shifts the bits to the left by the number of times defined by the right-hand side operand. After the left shift, the empty space in the right is filled with 0.
Next, let’s left shift the number 12 twice:
n << x has the same effect of multiplying the number n with x power of two.
7.6. The Signed Right Shift Operator
The signed right shift operator (>>) shifts the bits to the right by the number of times defined by the right-hand side operand and fills 0 on voids left as a result.
We should note that the leftmost position after the shifting depends on the sign extension .
Next, let’s do “signed right shift” twice on the numbers 12 and -12 to see the difference:
As the second example above shows, if the number is negative, the leftmost position after each shift will be set by the sign extension.
n >> x has the same effect of dividing the number n by x power of two.
7.7. The Unsigned Right Shift Operator
The unsigned right shift operator (>>>) works in a similar way as the ‘>>’ operator. The only difference is that after a shift, the leftmost bit is set to 0 .
Next, let’s unsigned right shift twice on the numbers 12 and -12 to see the difference:
As we can see in the second example above, the >>> operator fills voids on the left with 0 irrespective of whether the number is positive or negative .
8. The “ instanceof ” Operator
Sometimes, when we have an object, we would like to test if it’s an instance of a given type . The “ instanceof ” operator can help us to do it:
9. Assignment Operators
We use assignment operators to assign values to variables. Next, let’s see which assignment operators we can use in Java.
9.1. The Simple Assignment Operator
The simple assignment operator (=) is a straightforward but important operator in Java. Actually, we’ve used it many times in previous examples. It assigns the value on its right to the operand on its left:
9.2. Compound Assignments
We’ve learned arithmetic operators. We can combine the arithmetic operators with the simple assignment operator to create compound assignments.
For example, we can write “ a = a + 5 ” in a compound way: “ a += 5 “.
Finally, let’s walk through all supported compound assignments in Java through examples:
10. Conclusion
Java provides many groups of operators for different functionalities. In this article, we’ve passed through the operators in Java.
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Java - Assignment Operators with Examples
Java assignment operators.
Following are the assignment operators supported by Java language −
Operator | Description | Example |
---|---|---|
= | Simple assignment operator. Assigns values from right side operands to left side operand. | C = A + B will assign value of A + B into C |
+= | Add AND assignment operator. It adds right operand to the left operand and assign the result to left operand. | C += A is equivalent to C = C + A |
-= | Subtract AND assignment operator. It subtracts right operand from the left operand and assign the result to left operand. | C -= A is equivalent to C = C − A |
*= | Multiply AND assignment operator. It multiplies right operand with the left operand and assign the result to left operand. | C *= A is equivalent to C = C * A |
/= | Divide AND assignment operator. It divides left operand with the right operand and assign the result to left operand. | C /= A is equivalent to C = C / A |
%= | Modulus AND assignment operator. It takes modulus using two operands and assign the result to left operand. | C %= A is equivalent to C = C % A |
<<= | Left shift AND assignment operator. | C <<= 2 is same as C = C << 2 |
>>= | Right shift AND assignment operator. | C >>= 2 is same as C = C >> 2 |
&= | Bitwise AND assignment operator. | C &= 2 is same as C = C & 2 |
^= | bitwise exclusive OR and assignment operator. | C ^= 2 is same as C = C ^ 2 |
|= | bitwise inclusive OR and assignment operator. | C |= 2 is same as C = C | 2 |
The following programs are simple examples which demonstrate the assignment operators. Copy and paste the following Java programs as Test.java file, and compile and run the programs −
In this example, we're creating three variables a,b and c and using assignment operators . We've performed simple assignment, addition AND assignment, subtraction AND assignment and multiplication AND assignment operations and printed the results.
In this example, we're creating two variables a and c and using assignment operators . We've performed Divide AND assignment, Multiply AND assignment, Modulus AND assignment, bitwise exclusive OR AND assignment, OR AND assignment operations and printed the results.
In this example, we're creating two variables a and c and using assignment operators . We've performed Left shift AND assignment, Right shift AND assignment, operations and printed the results.
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- getAnnotationsByType()
- getAnnotations()
- getCanonicalName()
- getClasses()
- getClassLoader()
- getComponentType
- getConstructor()
- getConstructors()
- getDeclaredAnnotation()
- getDeclaredAnnotationsByType()
- getDeclaredAnnotations()
- getDeclaredConstructor()
- getDeclaredConstructors()
- getDeclaredField()
- getDeclaredFields()
- getDeclaredMethod()
- getDeclaredMethods()
- getDeclaringClass()
- getFields()
- getGenericInterfaces()
- getGenericSuperClass()
- getInterfaces()
- getMethod()
- getMethods()
- getModifiers()
- getPackage()
- getPackageName()
- getProtectionDomain()
- getResource()
- getSigners()
- getSimpleName()
- getSuperClass()
- isAnnotation()
- isAnnotationPresent()
- isAnonymousClass()
- isInstance()
- isInterface()
- isPrimitive()
- isSynthetic()
- Java Collections class
- asLifoQueue()
- binarySearch()
- checkedCollection()
- checkedList()
- checkedMap()
- checkedNavigableMap()
- checkedNavigableSet()
- checkedQueue()
- checkedSet()
- checkedSortedMap()
- checkedSortedSet()
- emptyEnumeration()
- emptyIterator()
- emptyList()
- emptyListIterator()
- emptyNavigableMap()
- emptyNavigableSet()
- emptySortedMap()
- emptySortedSet()
- enumeration()
- frequency()
- indexOfSubList()
- lastIndexOfSubList()
- newSetFromMap()
- replaceAll()
- reverseOrder()
- singleton()
- singletonList()
- singletonMap()
- synchronizedCollection()
- synchronizedList()
- synchronizedMap()
- synchronizedNavigableMap()
- synchronizedNavigableSet()
- synchronizedSet()
- synchronizedSortedMap()
- synchronizedSortedSet()
- unmodifiableCollection()
- unmodifiableList()
- unmodifiableMap()
- unmodifiableNavigableMap()
- unmodifiableNavigableSet()
- unmodifiableSet()
- unmodifiableSortedMap()
- unmodifiableSortedSet()
Java Compiler Class
- Java Compiler
- compileClass()
- compileClasses()
CopyOnWriteArrayList
- Java CopyOnWriteArrayList
- lastIndexOf()
Java Math Methods
- Math.round()
- Math.sqrt()
- Math.cbrt()
- Math.signum()
- Math.ceil()
- Math.copySign()
- Math.nextAfter()
- Math.nextUp()
- Math.nextDown()
- Math.floor()
- Math.floorDiv()
- Math.random()
- Math.rint()
- Math.hypot()
- Math.getExponent()
- Math.IEEEremainder()
- Math.addExact()
- Math.subtractExact()
- Math.multiplyExact()
- Math.incrementExact()
- Math.decrementExact()
- Math.negateExact()
- Math.toIntExact()
- Math.log10()
- Math.log1p()
- Math.expm1()
- Math.asin()
- Math.acos()
- Math.atan()
- Math.sinh()
- Math.cosh()
- Math.tanh()
- Math.toDegrees
- Math.toRadians
LinkedBlockingDeque
- Java LinkedBlockingDeque
- descendingIterator()
- offerFirst()
- offerLast()
- peekFirst()
- pollFirst()
- Java Long class
LinkedTransferQueue
- Java LinkedTransferQueue
- spliterator()
- Difference between Array and ArrayList
- When to use ArrayList and LinkedList in Java
- Difference between ArrayList and Vector
- How to Compare Two ArrayList in Java
- How to reverse ArrayList in Java
- How to make ArrayList Read Only
- Difference between length of array and size() of ArrayList in Java
- How to Synchronize ArrayList in Java
- How to convert ArrayList to Array and Array to ArrayList in java
- Array vs ArrayList in Java
- How to Sort Java ArrayList in Descending Order
- How to remove duplicates from ArrayList in Java
- Java MulticastSocket
- getInterface()
- getLoopbackMode()
- getNetworkInterface()
- getTimeToLive()
- joinGroup()
- leaveGroup()
- setInterface()
- setLoopbackMode()
- setNetworkInterface()
- setTimeToLive()
- Java Number Class
Java Phaser Class
- Java Phaser
- arriveAndAwaitAdvance()
- arriveAndDeregister()
- getParent()
- awaitAdvanceInterruptibly()
- awaitAdvance()
- bulkRegister()
- forceTermination()
- getArrivedParties()
- getRegisteredParties()
- getUnarrivedParties()
- isTerminated()
ArrayList Methods
- listIterator()
- removeRange
Java Thread Methods
- currentThread()
- getPriority()
- setPriority()
- setDaemon()
- interrupt()
- isinterrupted()
- interrupted()
- activeCount()
- checkAccess()
- dumpStack()
- getStackTrace()
- enumerate()
- getThreadGroup()
- notifyAll()
- setContextClassLoader()
- getContextClassLoader()
- getDefaultUncaughtExceptionHandler()
- setDefaultUncaughtExceptionHandler()
Java Projects
- Free Java Projects
- Payment Bill(JSP)
- Transport (JSP)
- Connect Globe (JSP)
- Online Banking (JSP)
- Online Quiz (JSP)
- Classified (JSP)
- Mailcasting (JSP)
- Online Library (JSP)
- Pharmacy (JSP)
- Mailer (Servlet)
- Baby Care (Servlet)
- Chat Server (Core)
- Library (Core)
- Exam System (Core)
- Java Apps (Core)
- Fee Report (Core)
- Fee (Servlet)
- eLibrary (Servlet)
- Fire Detection
- Attendance System
- Fibonacci Series in Java
- Prime Number Program in Java
- Palindrome Program in Java
- Factorial Program in Java
- Armstrong Number in Java
- How to Generate Random Number in Java
- How to Print Pattern in Java
- How to Compare Two Objects in Java
- How to Create Object in Java
- How to Print ASCII Value in Java
- How to Reverse a Number in Java
- Java Program to convert Number to Word
- Automorphic Number Program in Java
- Peterson Number in Java
- Sunny Number in Java
- Tech Number in Java
- Fascinating Number in Java
- Keith Number in Java
- Neon Number in Java
- Spy Number in Java
- ATM program Java
- Autobiographical Number in Java
- Emirp Number in Java
- Sphenic Number in Java
- Buzz Number Java
- Duck Number Java
- Evil Number Java
- ISBN Number Java
- Krishnamurthy Number Java
- Bouncy Number in Java
- Mystery Number in Java
- Smith Number in Java
- Strontio Number in Java
- Xylem and Phloem Number in Java
- nth Prime Number Java
- Java Program to Display Alternate Prime Numbers
- Java Program to Find Square Root of a Number Without sqrt Method
- Java Program to Swap Two Numbers Using Bitwise Operator
- Java Program to Find GCD of Two Numbers
- Java Program to Find Largest of Three Numbers
- Java Program to Find Smallest of Three Numbers Using Ternary Operator
- Java Program to Check if a Number is Positive or Negative
- Java Program to Check if a Given Number is Perfect Square
- Java Program to Display Even Numbers From 1 to 100
- Java Program to Display Odd Numbers From 1 to 100
- Java Program to Find Sum of Natural Numbers
- Java Program to copy all elements of one array into another array
- Java Program to find the frequency of each element in the array
- Java Program to left rotate the elements of an array
- Java Program to print the duplicate elements of an array
- Java Program to print the elements of an array
- Java Program to print the elements of an array in reverse order
- Java Program to print the elements of an array present on even position
- Java Program to print the elements of an array present on odd position
- Java Program to print the largest element in an array
- Java Program to print the smallest element in an array
- Java Program to print the number of elements present in an array
- Java Program to print the sum of all the items of the array
- Java Program to right rotate the elements of an array
- Java Program to sort the elements of an array in ascending order
- Java Program to sort the elements of an array in descending order
- Java Program to Find 3rd Largest Number in an array
- Java Program to Find 2nd Largest Number in an array
- Java Program to Find Largest Number in an array
- Java to Program Find 2nd Smallest Number in an array
- Java Program to Find Smallest Number in an array
- Java Program to Remove Duplicate Element in an array
- Java Program to Print Odd and Even Numbers from an array
- How to Sort an Array in Java
- Java Matrix Programs
- Java Program to Add Two Matrices
- Java Program to Multiply Two Matrices
- Java Program to subtract the two matrices
- Java Program to determine whether two matrices are equal
- Java Program to display the lower triangular matrix
- Java Program to display the upper triangular matrix
- Java Program to find the frequency of odd & even numbers in the given matrix
- Java Program to find the product of two matrices
- Java Program to find the sum of each row and each column of a matrix
- Java Program to find the transpose of a given matrix
- Java Program to determine whether a given matrix is an identity matrix
- Java Program to determine whether a given matrix is a sparse matrix
- Java Program to Transpose matrix
- Java Program to count the total number of characters in a string
- Java Program to count the total number of characters in a string 2
- Java Program to count the total number of punctuation characters exists in a String
- Java Program to count the total number of vowels and consonants in a string
- Java Program to determine whether two strings are the anagram
- Java Program to divide a string in 'N' equal parts.
- Java Program to find all subsets of a string
- Java Program to find the longest repeating sequence in a string
- Java Program to find all the permutations of a string
- Java Program to remove all the white spaces from a string
- Java Program to replace lower-case characters with upper-case and vice-versa
- Java Program to replace the spaces of a string with a specific character
- Java Program to determine whether a given string is palindrome
- Java Program to determine whether one string is a rotation of another
- Java Program to find maximum and minimum occurring character in a string
- Java Program to find Reverse of the string
- Java program to find the duplicate characters in a string
- Java program to find the duplicate words in a string
- Java Program to find the frequency of characters
- Java Program to find the largest and smallest word in a string
- Java Program to find the most repeated word in a text file
- Java Program to find the number of the words in the given text file
- Java Program to separate the Individual Characters from a String
- Java Program to swap two string variables without using third or temp variable.
- Java Program to print smallest and biggest possible palindrome word in a given string
- Reverse String in Java Word by Word
- Reserve String without reverse() function
- Linear Search in Java
- Binary Search in Java
- Bubble Sort in Java
- Selection Sort in Java
- Insertion Sort in Java
- How to convert String to int in Java
- How to convert int to String in Java
- How to convert String to long in Java
- How to convert long to String in Java
- How to convert String to float in Java
- How to convert float to String in Java
- How to convert String to double in Java
- How to convert double to String in Java
- How to convert String to Date in Java
- How to convert Date to String in Java
- How to convert String to char in Java
- How to convert char to String in Java
- How to convert String to Object in Java
- How to convert Object to String in Java
- How to convert int to long in Java
- How to convert long to int in Java
- How to convert int to double in Java
- How to convert double to int in Java
- How to convert char to int in Java
- How to convert int to char in Java
- How to convert String to boolean in Java
- How to convert boolean to String in Java
- How to convert Date to Timestamp in Java
- How to convert Timestamp to Date in Java
- How to convert Binary to Decimal in Java
- How to convert Decimal to Binary in Java
- How to convert Hex to Decimal in Java
- How to convert Decimal to Hex in Java
- How to convert Octal to Decimal in Java
- How to convert Decimal to Octal in Java
- Java program to print the following spiral pattern on the console
- Java program to print the following pattern
- Java program to print the following pattern 2
- Java program to print the following pattern 3
- Java program to print the following pattern 4
- Java program to print the following pattern 5
- Java program to print the following pattern on the console
- Java program to print the following pattern on the console 2
- Java program to print the following pattern on the console 3
- Java program to print the following pattern on the console 4
- Java program to print the following pattern on the console 5
- Java program to print the following pattern on the console 6
- Java program to print the following pattern on the console 7
- Java program to print the following pattern on the console 8
- Java program to print the following pattern on the console 9
- Java program to print the following pattern on the console 10
- Java program to print the following pattern on the console 11
- Java program to print the following pattern on the console 12
- Singly linked list Examples in Java
- Java Program to create and display a singly linked list
- Java program to create a singly linked list of n nodes and count the number of nodes
- Java program to create a singly linked list of n nodes and display it in reverse order
- Java program to delete a node from the beginning of the singly linked list
- Java program to delete a node from the middle of the singly linked list
- Java program to delete a node from the end of the singly linked list
- Java program to determine whether a singly linked list is the palindrome
- Java program to find the maximum and minimum value node from a linked list
- Java Program to insert a new node at the middle of the singly linked list
- Java program to insert a new node at the beginning of the singly linked list
- Java program to insert a new node at the end of the singly linked list
- Java program to remove duplicate elements from a singly linked list
- Java Program to search an element in a singly linked list
- Java program to create and display a Circular Linked List
- Java program to create a Circular Linked List of N nodes and count the number of nodes
- Java program to create a Circular Linked List of n nodes and display it in reverse order
- Java program to delete a node from the beginning of the Circular Linked List
- Java program to delete a node from the end of the Circular Linked List
- Java program to delete a node from the middle of the Circular Linked List
- Java program to find the maximum and minimum value node from a circular linked list
- Java program to insert a new node at the beginning of the Circular Linked List
- Java program to insert a new node at the end of the Circular Linked List
- Java program to insert a new node at the middle of the Circular Linked List
- Java program to remove duplicate elements from a Circular Linked List
- Java program to search an element in a Circular Linked List
- Java program to sort the elements of the Circular Linked List
- Java program to convert a given binary tree to doubly linked list
- Java program to create a doubly linked list from a ternary tree
- Java program to create a doubly linked list of n nodes and count the number of nodes
- Java program to create a doubly linked list of n nodes and display it in reverse order
- Java program to create and display a doubly linked list
- Java program to delete a new node from the beginning of the doubly linked list
- Java program to delete a new node from the end of the doubly linked list
- Java program to delete a new node from the middle of the doubly linked list
- Java program to find the maximum and minimum value node from a doubly linked list
- Java program to insert a new node at the beginning of the Doubly Linked list
- Java program to insert a new node at the end of the Doubly Linked List
- Java program to insert a new node at the middle of the Doubly Linked List
- Java program to remove duplicate elements from a Doubly Linked List
- Java program to rotate doubly linked list by N nodes
- Java program to search an element in a doubly linked list
- Java program to sort the elements of the doubly linked list
- Java Program to calculate the Difference between the Sum of the Odd Level and the Even Level Nodes of a Binary Tree
- Java program to construct a Binary Search Tree and perform deletion and In-order traversal
- Java program to convert Binary Tree to Binary Search Tree
- Java program to determine whether all leaves are at same level
- Java program to determine whether two trees are identical
- Java program to find maximum width of a binary tree
- Java program to find the largest element in a Binary Tree
- Java program to find the maximum depth or height of a tree
- Java program to find the nodes which are at the maximum distance in a Binary Tree
- Java program to find the smallest element in a tree
- Java program to find the sum of all the nodes of a binary tree
- Java program to find the total number of possible Binary Search Trees with N keys
- Java program to implement Binary Tree using the Linked List
- Java program to search a node in a Binary Tree
- Candy Distribution Problem in Java
- Find Rectangle in a Matrix with Corner as 1 in Java
- Minimum Number of Taps to Open to Water a Garden in Java
- Seven Segment Display Problem in Java
- Split Array Largest Sum in Java
- Find Original Array from a Double Array in Java
- Minimum Lights to Activate Problem in Java
- Rotate List in Java
- Count of Range Sum Problem in Java
- Create A Tree of Coprime in Java
- Convert Integer to Roman Numerals in Java
- Check if n and its Double Exist or not in Java
- Array of Doubled Pair Problem in Java
- Tag Content Extractor Problem in Java
- Convert Roman to Integer in Java
- Minimum Number of Flips to Convert Binary Matrix into Zero Matrix in Java
- XOR of Array Elements Except Itself in Java
- Check If the Given Array is Mirror Inverse in Java
- How to Create a Mirror Image of A 2D Array in Java
- Add Numbers Represented by Linked Lists in Java
- Majority Element In an Array in Java
- Block Swap Algorithm or Array Rotation in Java
- Minimum Difference Among Group Size Two in Java
- Missing Number in An Arithmetic Progression in Java
- Peak Index of Mountain Array Problem in Java
- Minimum Number of Meeting Room Required Problem in Java
- Move Zeros to End in Java
- Count Inversions in an array in Java
- Count Smaller Elements on The Right Side in Java
- Interleaving String Problem in Java
- Bulb Chain Problem in Java
- Java Main Method
- System.out.println()
- Java Memory Management
- Java ClassLoader
- Java Decompiler
- Java vs. JavaScript
- Java vs. Kotlin
- Java vs. Python
- Java Absolute Value
- How to Create File
- Delete a File in Java
- Open a File in Java
- Sort a List in Java
- Convert byte Array to String
- Java Basics
- How to Compile & Run Java Program
- How to Run Java Program in Eclipse
- How to Verify Java Version
- Ways to Create an Object in Java
- How to Run a Java program in Windows 10
- Runnable Interface in Java
- Java Keystore
- Get input from user in Java
- Read file line by line in Java
- Take String input in Java
- How to Read Excel File in Java
- Read XML File in Java
- CompletableFuture in Java
- Java ExecutorService
- How to iterate Map in Java
- How to Return an Array in Java
- How to Sort HashMap by Value
- How to Sort HashMap in Java
- Load Factor in HashMap
- Array vs ArrayList
- HashMap vs TreeMap
- HashSet vs HashMap class
- Compare Two ArrayList in Java
- Merge Two Arrays in Java
- Print Array in Java
- Read CSV File in Java
- Remove Special Characters from String
- ArrayIndexOutOfBoundsException
- ConcurrentModificationException
- NoSuchElementException
- NumberFormatException
- How to Sort ArrayList in Java
- How to Download Java
- How to Call a Method in Java
- How to Create Singleton Class in Java
- How to Find Array Length in Java
- How to Read Character in Java
- Can We Overload main() Method in Java
- How to Convert Char Array to String in Java
- How to Run Java Program in CMD Using Notepad
- How to Sort String Array in Java
- How to Compare Dates in Java
- How to Take Multiple String Input in Java Using Scanner
- How to Remove Last Character from String in Java
- How TreeMap Works Internally in Java
- Java Program to Break Integer into Digits
- Java Program to Calculate Area and Circumference of Circle
- What is Diamond Problem in Java
- Java Program to Read Number from Standard Input
- How to Download Minecraft Java Edition
- Can We Override Static Method in Java
- How to Avoid Deadlock in Java
- How to Achieve Abstraction in Java
- How Garbage Collection Works in Java
- How to Take Array Input in Java
- How to Create Array of Objects in Java
- How to Create Package in Java
- How to Print in Java
- What is Framework in Java
- Why Java is Secure
- How to Iterate List in Java
- How to Use Eclipse for Java
- Which Package is Imported by Default in Java
- Could Not Find or Load Main Class in Java
- How to Compare Two Arrays in Java
- How to Convert String to JSON Object in Java
- Which is Better Java or Python
- How to Update Java
- How to Get Value from JSON Object in Java Example
- How to Split a String in Java with Delimiter
- Structure of Java Program
- Why We Use Constructor in Java
- Java Create Excel File
- Java Interpreter
- javac is not Recognized
- Dynamic Array in Java
- Shunting yard algorithm
- Java Destructor
- Custom ArrayList in Java
- ArrayList vs HashMap
- Java Constant
- Java Tokens
- How to Enable Java in Chrome
- Java Semaphore
- Array to List in Java
- JIT in Java
- How to Clear Screen in Java
- Java Logger
- Reverse a String Using Recursion in Java
- Java Path Vs File
- Float Vs Double Java
- Stack vs Heap Java
- Abstraction vs Encapsulation
- Top 10 Java Books
- Public vs Private
- What is Java Used For
- Bitwise Operator in Java
- SOLID Principles Java
- Type Casting in Java
- Conditional Operator in Java
- Ternary Operator Java
- Java Architecture
- REPL in Java
- Types of Exception in Java
- Why String is Immutable or Final in Java
- Java vs Kotlin
- Set in Java
- Why non-static variable cannot be referenced from a static context in Java
- Java Developer Roles and Responsibilities
- Types of Classes in Java
- Marker Interface in Java
- Static Function in Java
- Unary Operators in Java
- What is Advance Java
- ArrayList Implementation
- Convert ArrayList to String Array
- Hashmap vs ConcurrentHashMap
- List vs ArrayList
- Map vs HashMap
- HashSet vs LinkedHashSet
- How TreeSet Works Internally
- LinkedHashMap vs HashMap
- Java Program to Solve Quadratic Equation
- Scope Resolution Operator in Java
- Composition in Java
- File Operations in Java
- NoClassDefFoundError in Java
- Thread Concept in Java
- Upcasting and Downcasting in Java
- Dynamic Polymorphism in Java
- String Pool in Java
- What is constructor chaining in Java
- Add elements to Array in Java
- Advantages and disadvantages of Java
- Advantages of JavaBeans
- AWS SDK for Java with Apache Maven
- AWT and Swing in Java
- AWT Program in Java
- Boolean values in Java
- ByteStream Classes in Java
- CharacterStream Classes in Java
- Class and Interface in Java
- ClassCast Exception in Java
- Cloneable in Java
- Constructor overloading in Java
- Control Flow in Java
- Convert Java Object to Json using GSON
- Convert XML to JSON in Java
- How to avoid null pointer exception in Java
- Java constructor returns a value, but what
- Singleton Class in Java
- Doubly Linked List Program in Java
- Association in Java
- Big data Java vs Python
- Branching Statements in Java
- Collections Sort in Java 8
- List vs Set in Java
- How many days required to learn Java
- Implicitly Typecasting in Java
- Legacy Class in Java
- Character Array in Java
- Equals() and Hashcode() in Java
- Externalization in Java
- Identifiers in Java
- InvocationTargetException
- Java Pass by Value
- Mutable and Immutable in Java
- Power Function in Java
- Primitive Data Types in Java
- String Array in Java
- Virtual Function in Java
- C vs C++ vs Java
- Java String Max Size
- Convert Java object to JSON
- How to Calculate Date Difference in Java
- How to Improve Coding Skills in Java
- Java Email Validation
- Java Testing Tools
- Permutation and Combination in Java
- Unique Number in Java Program
- Java Code for DES
- Pig Latin Program in Java
- Array Rotation in Java
- Equilibrium Index of an Array in Java
- Different Ways to Print Exception Message in Java
- Java Copy Constructor Example
- Why We Use Static Class in Java
- What is Core Java
- Set vs Map in Java
- How to Create a New Folder in Java
- Remove an Element from ArrayList in Java
- How to Create Test Cases for Exceptions in Java
- How to Convert JSON Array to ArrayList in Java
- How to Create a Class File in Java
- Java Spring Pros & Cons
- Java Stack Trace
- Array Slicing in Java
- Flutter vs Java
- Permutation of Numbers in Java
- Magic Number in Java
- Reference Data Types in Java
- Counter variable in Java
- How to take Character Input in Java using BufferedReader Class
- Java employee details program
- Java is case sensitive explain
- Ramanujan Number or Taxicab Number in Java
- Advanced Java Books in 2021
- Fail Fast and Fail Safe Iterator in Java
- How to build a Web Application Using Java
- Is Java Interpreted or Compiled
- Java Big Data Frameworks
- Java Get Data From URL
- No Main Manifest Attribute
- Java missing return statement
- Java program to remove duplicate characters from a string
- JUnit test case example in Java
- List of logical programs in Java
- PermGen space Java
- Unsigned Right Shift Operator in Java
- Infix to Postfix Java
- Memory Leak in Java
- How To Write Test Cases In Java
- Java 32-Bit Download For Windows 10
- FizzBuzz Program in Java
- A Java Runtime Environment JRE Or JDK Must Be Available
- Java Does Not Open
- No Java Virtual Machine was Found
- Java Program Number to Word
- Types of Garbage Collector in Java
- No Suitable Driver Found For JDBC
- AVL Tree program in Java
- Fail-fast and Fail-safe in Java
- Find unique elements in array Java
- Highest precedence in Java
- Java Closure
- Java String Encoding
- Prim's algorithm Java
- Quartz scheduler java
- Red Black Tree Java
- GC Overhead Limit Exceeded
- Generating QR Code in Java
- Delegation Event Model in Java
- Java Profilers
- Java Flight Recorder
- Bucket Sort in Java
- Java Atomic
- Wait vs Sleep in Java
- Executor Framework Java
- Gregorian calendar Java
- int vs Integer Java
- What is truncation in Java
- Java HTTP Proxy Server
- Java Static Constructor
- How to prepare for Java Interview
- Java callback function
- Java 8 vs Java 11
- Login Form Java
- Vaadin Framework Java
- EJB vs. Spring
- Types of Applets in Java
- Visitor Design Pattern Java
- Advantages of Python over Java
- Design Principles in Java
- JSON Validator Java
- Pseudocode Java
- Windows Programming Using Java
- Vert.x Java
- Complex Java Programs
- ORE Number Java
- PalPrime Number Java
- Twin Prime Numbers
- Twisted Prime Number Java
- Ugly number Java
- Achilles Number in Java
- Amicable Pair Number in Java
- Playfair Cipher Program in Java
- Java.lang.outofmemoryerror: java heap space
- Banker's Algorithm Java
- Kruskal Algorithm Java
- Longest Common Subsequence
- Travelling Salesman Problem
- & vs && in Java
- Jumping Number in Java
- Lead Number in Java
- Lucky Number in Java
- Middle Digit Number in Java
- Special Number in Java
- Passing Array to Function In Java
- Lexicographical Order Java
- Adam Number in Java
- Bell Number in Java
- Reduce Java
- LRU Cache Implementation
- Goldbach Number in Java
- How to Find Number of Objects Created in Java
- Multiply Two Numbers Without Using Arithmetic Operator in Java
- Sum of Digits of a Number in Java
- Sum of Numbers in Java
- Power of a Number in Java
- Sum of Prime Numbers in Java
- Cullen Number in Java
- Mobile Number Validation in Java
- Fermat Number in Java
- Instantiation in Java
- Exception Vs Error in Java
- flatMap() Method in Java 8
- How to Print Table in Java
- Java Create PDF
- Mersenne Number in Java
- Pandigital Number in Java
- Pell Number in Java
- Java Get Post
- Fork Join in Java
- Java Callable Example
- Blockchain Java
- Design of JDBC
- Java Anon Proxy
- Knapsack Problem Java
- Session Tracking in Java
- What is Object-Oriented Programming
- Literals in Java
- Square Free Number in Java
- What is an anagram in Java
- What is programming
- Iterate JSON Array Java
- Java Date Add Days
- Javac Command Not Found
- Factorial Program in Java Using while Loop
- Frugal Number in Java
- Java Digital Signature
- Catalan Number in Java
- Partition Number in Java
- Powerful Number in Java
- Practical Number in Java
- Chromatic Number in Java
- Sublime Number in Java
- Advanced Java Viva Questions
- Getter and Setter Method in Java Example
- How to convert String to String array in Java
- How to Encrypt Password in Java
- Instance Variable in Java
- Java File Extension
- Types of Inheritance in Java
- Untouchable Number in Java
- AES 256 Encryption in Java
- Applications of Array in Java
- Example of Static Import in Java
- Hill Cipher Program in Java
- Lazy Loading in Java
- Rectangular Number in Java
- How to Print Table in Java Using Formatter
- IdentityHashMap Class in Java
- Undulating Number in Java
- Java Obfuscator
- Java Switch String
- Applet Life Cycle in Java
- Banking Application in Java
- Duodecimal in Java
- Economical Number in Java
- Figurate Number in Java
- How to resolve IllegalStateException in Java
- Java Coding Software
- Java Create Jar Files
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Java is a popular programming language that software developers use to construct a wide range of applications. It is a simple, robust, and platform-independent object-oriented language. There are various types of assignment operators in Java, each with its own function. In this section, we will look at Java's many types of assignment operators, how they function, and how they are utilized. To assign a value to a variable, use the basic assignment operator (=). It is the most fundamental assignment operator in Java. It assigns the value on the right side of the operator to the variable on the left side.
In the above example, the variable x is assigned the value 10. To add a value to a variable and subsequently assign the new value to the same variable, use the addition assignment operator (+=). It takes the value on the right side of the operator, adds it to the variable's existing value on the left side, and then assigns the new value to the variable.
To subtract one numeric number from another, use the subtraction operator. All numeric data types, including integers and floating-point values, can be utilised with it. Here's an illustration:
In this example, we create two integer variables, a and b, subtract b from a, and then assign the result to the variable c. To combine two numerical numbers, use the multiplication operator. All numeric data types, including integers and floating-point values, can be utilised with it. Here's an illustration:
In this example, we declare two integer variables, a and b, multiply their values using the multiplication operator, and then assign the outcome to the third variable, c. To divide one numerical number by another, use the division operator. All numeric data types, including integers and floating-point values, can be utilised with it. Here's an illustration:
In this example, we declare two integer variables, a and b, divide them by one another using the division operator, and then assign the outcome to the variable c. It's vital to remember that when two numbers are divided, the outcome will also be an integer, and any residual will be thrown away. For instance: The modulus assignment operator (%=) computes the remainder of a variable divided by a value and then assigns the resulting value to the same variable. It takes the value on the right side of the operator, divides it by the current value of the variable on the left side, and then assigns the new value to the variable on the left side.
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Java Assignment Operators
Description.
Assigning a value to a variable seems straightforward enough; you simply assign the stuff on the right side of the '= 'to the variable on the left. Below statement 1 assigning value 10 to variable x and statement 2 is creating String object called name and assigning value "Amit" to it.
Assignment can be of various types. Let’s discuss each in detail.
Primitive Assignment:
The equal (=) sign is used for assigning a value to a variable. We can assign a primitive variable using a literal or the result of an expression.
Primitive Casting
Casting lets you convert primitive values from one type to another. We need to provide casting when we are trying to assign higher precision primitive to lower precision primitive for example If we try to assign int variable (which is in the range of byte variable) to byte variable then the compiler will throw an exception called "possible loss of precision". Eclipse IDE will suggest the solution as well as shown below. To avoid such problem we should use type casting which will instruct compiler for type conversion.
For cases where we try to assign smaller container variable to larger container variables we do not need of explicit casting. The compiler will take care of those type conversions. For example, we can assign byte variable or short variable to an int without any explicit casting.
Assigning Literal that is too large for a variable
When we try to assign a variable value which is too large (or out of range ) for a primitive variable then the compiler will throw exception “possible loss of precision” if we try to provide explicit cast then the compiler will accept it but narrowed down the value using two’s complement method. Let’s take an example of the byte which has 8-bit storage space and range -128 to 127. In below program we are trying to assign 129 literal value to byte primitive type which is out of range for byte so compiler converted it to -127 using two’s complement method. Refer link for two’s complement calculation (http://en.wikipedia.org/wiki/Two's_complement)
Java Code: Go to the editor
Reference variable assignment
We can assign newly created object to object reference variable as below
First line will do following things,
- Makes a reference variable named s of type String
- Creates a new String object on the heap memory
- Assigns the newly created String object to the reference variables
You can also assign null to an object reference variable, which simply means the variable is not referring to any object. The below statement creates space for the Employee reference variable (the bit holder for a reference value) but doesn't create an actual Employee object.
Compound Assignment Operators
Sometime we need to modify the same variable value and reassigned it to a same reference variable. Java allows you to combine assignment and addition operators using a shorthand operator. For example, the preceding statement can be written as:
The += is called the addition assignment operator. Other shorthand operators are shown below table
Operator | Name | Example | Equivalent |
---|---|---|---|
+= | Addition assignment | i+=5; | i=i+5 |
-= | Subtraction assignment | j-=10; | j=j-10; |
*= | Multiplication assignment | k*=2; | k=k*2; |
/= | Division assignment | x/=10; | x=x/10; |
%= | Remainder assignment | a%=4; | a=a%4; |
Below is the sample program explaining assignment operators:
- Assigning a value to can be straight forward or casting.
- If we assign the value which is out of range of variable type then 2’s complement is assigned.
- Java supports shortcut/compound assignment operator.
Java Code Editor:
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1. (=) operator: This is the most straightforward assignment operator, which is used to assign the value on the right to the variable on the left. This is the basic definition of an assignment operator and how it functions. Syntax: num1 = num2; Example: a = 10;
The Simple Assignment Operator. One of the most common operators that you'll encounter is the simple assignment operator "=". You saw this operator in the Bicycle class; it assigns the value on its right to the operand on its left:
Java Assignment Operators. Assignment operators are used to assign values to variables. In the example below, we use the assignment operator (=) to assign the value 10 to a variable called x:
An assignment statement designates a value for a variable. An assignment statement can be used as an expression in Java. After a variable is declared, you can assign a value to it by using an assignment statement. In Java, the equal sign = is used as the assignment operator.
Assignment statements initialize or change the value stored in a variable using the assignment operator =. An assignment statement always has a single variable on the left hand side of the = sign.
We can combine the arithmetic operators with the simple assignment operator to create compound assignments. For example, we can write “a = a + 5” in a compound way: “a += 5“. Finally, let’s walk through all supported compound assignments in Java through examples:
In this example, we're creating three variables a,b and c and using assignment operators. We've performed simple assignment, addition AND assignment, subtraction AND assignment and multiplication AND assignment operations and printed the results.
There are various types of assignment operators in Java, each with its own function. In this section, we will look at Java's many types of assignment operators, how they function, and how they are utilized.
Learn about all Java assignment operators with examples. Understand how to use the 7 assignment operators in Java to assign values to variables.
Java allows you to combine assignment and addition operators using a shorthand operator. For example, the preceding statement can be written as: i +=8; //This is same as i = i+8;