Equal to operator in java

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:

Example

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:

Example

int sum1 = 100 + 50; // 150 (100 + 50) int sum2 = sum1 + 250; // 400 (150 + 250) int sum3 = sum2 + sum2; // 800 (400 + 400) 

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	Try it »
—	Subtraction	Subtracts one value from another	x — y	Try it »
*	Multiplication	Multiplies two values	x * y	Try it »
/	Division	Divides one value by another	x / y	Try it »
%	Modulus	Returns the division remainder	x % y	Try it »
++	Increment	Increases the value of a variable by 1	++x	Try it »
—	Decrement	Decreases the value of a variable by 1	—x	Try it »

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:

Example

The addition assignment operator ( += ) adds a value to a variable:

Example

A list of all assignment operators:

Operator	Example	Same As	Try it
=	x = 5	x = 5	Try it »
+=	x += 3	x = x + 3	Try it »
-=	x -= 3	x = x — 3	Try it »
*=	x *= 3	x = x * 3	Try it »
/=	x /= 3	x = x / 3	Try it »
%=	x %= 3	x = x % 3	Try it »
&=	x &= 3	x = x & 3	Try it »
|=	x |= 3	x = x | 3	Try it »
^=	x ^= 3	x = x ^ 3	Try it »
>>=	x >>= 3	x = x >> 3	Try it »
	x	x = x	Try it »

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:

Example

int x = 5; int y = 3; System.out.println(x > y); // returns true, because 5 is higher than 3 

Operator	Name	Example	Try it
==	Equal to	x == y	Try it »
!=	Not equal	x != y	Try it »
>	Greater than	x > y	Try it »
	Less than	x < y	Try it »
>=	Greater than or equal to	x >= y	Try it »
	Less than or equal to	x	Try it »

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	Try it »
||	Logical or	Returns true if one of the statements is true	x < 5 || x < 4	Try it »
!	Logical not	Reverse the result, returns false if the result is true	!(x < 5 && x < 10)	Try it »

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Equality, Relational, and Conditional Operators

The equality and relational operators determine if one operand is greater than, less than, equal to, or not equal to another operand. The majority of these operators will probably look familiar to you as well. Keep in mind that you must use » == «, not » = «, when testing if two primitive values are equal.

== equal to != not equal to > greater than >= greater than or equal to < less than 
The following program, ComparisonDemo , tests the comparison operators:
class ComparisonDemo < public static void main(String[] args)< int value1 = 1; int value2 = 2; if(value1 == value2) System.out.println("value1 == value2"); if(value1 != value2) System.out.println("value1 != value2"); if(value1 >value2) System.out.println("value1 > value2"); if(value1 < value2) System.out.println("value1 < value2"); if(value1 >
 
The Conditional Operators
 
The && and || operators perform Conditional-AND and Conditional-OR operations on two boolean expressions. These operators exhibit "short-circuiting" behavior, which means that the second operand is evaluated only if needed.
 
&& Conditional-AND || Conditional-OR
 
The following program, ConditionalDemo1 , tests these operators:
 
Another conditional operator is ?: , which can be thought of as shorthand for an if-then-else statement (discussed in the Control Flow Statements section of this lesson). This operator is also known as the ternary operator because it uses three operands. In the following example, this operator should be read as: "If someCondition is true , assign the value of value1 to result . Otherwise, assign the value of value2 to result ."
 
The following program, ConditionalDemo2 , tests the ?: operator:
 
Because someCondition is true, this program prints "1" to the screen. Use the ?: operator instead of an if-then-else statement if it makes your code more readable; for example, when the expressions are compact and without side-effects (such as assignments).
 
The Type Comparison Operator instanceof
 
The instanceof operator compares an object to a specified type. You can use it to test if an object is an instance of a class, an instance of a subclass, or an instance of a class that implements a particular interface.
 
The following program, InstanceofDemo , defines a parent class (named Parent ), a simple interface (named MyInterface ), and a child class (named Child ) that inherits from the parent and implements the interface.
 
class InstanceofDemo < public static void main(String[] args) < Parent obj1 = new Parent(); Parent obj2 = new Child(); System.out.println("obj1 instanceof Parent: " + (obj1 instanceof Parent)); System.out.println("obj1 instanceof Child: " + (obj1 instanceof Child)); System.out.println("obj1 instanceof MyInterface: " + (obj1 instanceof MyInterface)); System.out.println("obj2 instanceof Parent: " + (obj2 instanceof Parent)); System.out.println("obj2 instanceof Child: " + (obj2 instanceof Child)); System.out.println("obj2 instanceof MyInterface: " + (obj2 instanceof MyInterface)); >> class Parent <> class Child extends Parent implements MyInterface <> interface MyInterface <>
 
obj1 instanceof Parent: true obj1 instanceof Child: false obj1 instanceof MyInterface: false obj2 instanceof Parent: true obj2 instanceof Child: true obj2 instanceof MyInterface: true
 
When using the instanceof operator, keep in mind that null is not an instance of anything.
 
Previous page: Assignment, Arithmetic, and Unary Operators 
Next page: Bitwise and Bit Shift Operators
 
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Relational Operators in Java
 
 
Relational operators in Java are binary Java operators used to check the relations between two operands. They return a boolean value ( true or false ) by comparing the two operands. Java supports a variety of relational operators, including greater than ( > ), less than ( < ), greater than or equal to ( >= ), less than or equal to ( 
 
What are Relational Operators in Java?
 
In programming, we often need to check the relation between two operands such as equality, in-equality, etc. Relational operators in Java are used to check the relations between two operands. After comparison, the relational operators return a boolean value. Relational operators are mainly used for conditional checks in if , else , for , while , etc.
 
Syntax
 
The syntax for relational operators in Java is given below:
 
 
operand1 - The first variable to be compared
 
operand2 - The second variable to be compared
 
relational_operator - The relational operator to check relation between operand1 and operand2 .
 
 
Types of Relational Operators in Java
 
There are six types of relational operators in Java, and they can be found below:
 
 
Equal To ( == ) - Checks if two operands are equal
 
Not Equal To ( != ) - Checks if two operands are not equal
 
Greater Than ( > ) - Checks if one operand is greater than the other
 
Less Than ( < ) - Checks if one operand is less than the other
 
Greater Than or Equal To ( >= ) - Checks if one operand is either greater than or equal to the other.
 
Less Than or Equal To ( 
 
Equal To ( == )
 
The Equal To ( == ) operator checks if two operands are equal. It returns true if two operands are equal; else false . The syntax of the == operator is:
 
Not Equal To ( != )
 
The Not Equal To ( != ) operator checks if two operands are not equal. It returns true if two operands are not equal; else false . The syntax of the != operator is:
 
Greater Than ( > )
 
The Greater Than ( > ) operator checks if one operand is greater than the other. It returns true if the first operand is greater than the other; else false . The syntax for the > operator is:
 
Less Than ( < )
 
Greater Than or Equal To ( >= )
 
The Greater Than or Equal To ( >= ) operator checks whether one operand is greater than or equal to the other. It returns true if the first operand is greater than or equal to the other; else false . The syntax for the >= operator is:
 
Less Than or Equal To ( 
Examples of Relational Operators in Java
 
Equal To ( == )
 
We used the == operator to check if two values are equal.
 
Not Equal To ( != )
 
We used the != operator to check if the two values were not equal equal.
 
Greater Than ( > )
 
We used the > operator to check if one value is greater than the other.
 
Less Than ( < )
 
Greater Than or Equal To ( >= )
 
We used the >= operator to check whether one value is greater than or equal to the other.
 
Less Than or Equal To ( 
Conclusion
 
 
Relational operators in Java are binary operators used to check the relations between two operands
 
Relational operators return a boolean value
 
There are six relational operators in Java: == , != , < , >, =
 
Relational operators are mainly used for conditional checks if, else, for, while, etc.
 
 
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Java Operators
 
 
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