The Geek Diary

Java Operators

by

Java – Operators

Operators are used to perform operations on variables and values/multiple conditions. JAVA divides the operators in the following groups:

  • Arithmetic operators
  • Assignment operators
  • Comparison operators
  • The Bitwise Operators
  • Logical operators

Arithmetic Operators

JAVA arithmetic operators are used with numeric values to perform common arithmetical operations, such as addition, subtraction, multiplication etc.

Operator Name Example Result
+ Addition x + y Sum of x and y
– Subtraction x – y Difference of x and y
* Multiplication x * y Product of x and y
/ Division x / y Quotient of x and y
% Modulus x % y Remainder of $x divided by $y
** Exponentiation x ** y Raising x to the y’th power

Assignment Operators

The Java assignment operators are used with numeric values to write a value to a variable. The basic assignment operator in java is “=”. It means that the left operand gets set to the value of the assignment expression on the right.

Assignment Same as… Description
x = y x = y The left operand the expression is equal to right
x += y x = x + y Addition
x -= y x = x – y Subtraction
x *= y x = x * y Multiplication
x /= y x = x / y Division
x %= y x = x % y Modulus

Comparison Operators

The java comparison operators are used to compare two values (number or string):

Operator Name Example Result
== Equal x == y Returns true if x is equal to y
=== Identical x === y Returns true if x is equal to y, and they are of the same type
!= Not equal x != y Returns true if x is not equal to y
<> Not equal x <> y Returns true if $x is not equal to y
!== Not identical x !== y Returns true if x is not equal to y, or they are not of the same type
> Greater than x > y Returns true if $x is greater than $y
< Less than x < y Returns true if $x is less than $y
>= Greater than or equal to x >= y Returns true if x is greater than or equal to y
<= Less than or equal to x <= y Returns true if x is less than or equal to y

The Bitwise Operators

ThE Java have many bitwise operators such as integer types, long, int, short, char, and byte.

Operator Name Description Example
& bitwise and Binary AND Operator copies a bit to the result if it exists in both operands. 0000 1100
| bitwise or Binary OR Operator copies a bit if it exists in either operand. 0011 1101
^ bitwise XOR Binary XOR Operator copies the bit if it is set in one operand but not both. 0011 0001
~ bitwise compliment Binary Ones Complement Operator is unary and has the effect of ‘flipping’ bits. (~A ) will give -61 which is 1100 0011 in 2’s complement form due to a signed binary number.
<< left shift The left operands value is moved left by the number of bits specified by the right operand. –
>> right shift The left operands value is moved right by the number of bits specified by the right operand. –

Logical Operators

The JAVA logical operators are used to combine conditional statements.

Operator Name Example Result
and And x and y True if both x and y are true
or Or x or y True if either x or y is true
xor Xor x xor y True if either x or y is true, but not both
&& And x && y True if both x and y are true
|| Or x || y True if either x or y is true
! Not !x True if x is not true

Conditional Operator ( ? : )

Conditional operator is also known as the ternary operator. This operator consists of three operands and is used to evaluate Boolean expressions.

Syntax

variable x = (expression) ? value if true : value if false

Example

public class Test {

   public static void main(String args[]) {
      int a, b;
      a = 30;
      b = (a == 1) ? 40: 50;
      System.out.println( "Value of b is : " +  b );

      b = (a == 30) ? 40: 50;
      System.out.println( "Value of b is : " + b );
   }
}

output

Value of b is : 50
Value of b is : 40

instanceof Operator

operator checks whether the object is of class type or interface type.

Syntax

( Object reference variable ) instanceof  (class/interface type)

Example

public class Test {

   public static void main(String args[]) {

      String name = "Jhon";

      // following will return true since name is type of String
      boolean result = name instanceof String;
      System.out.println( result );
   }
}

Output

true

You May Also Like