Java provides a set of operators to manipulate variables.

We can divide all the Java operators into the following groups:

• Arithmetic Operators
• Relational Operators
• Bitwise Operators
• Logical Operators
• Assignment Operators
• Miscellaneous Operators

Arithmetic Operators:

Arithmetic operators are used in mathematical expressions in the same way that they are used in algebra.

Relational Operators

There are following relational operators supported by Java language.
Assume variable A and B. A value is 20 and B value is 30

Bitwise Operators

• Java defines several bitwise operators, which can be applied to the integer types, long, int, short, char, and byte.
• Bitwise operator works on bits and performs bit-by-bit operation.

Assume if a = 60 and b = 13;
In binary format :
a = 0011 1100 and b = 0000 1101

a&b = 0000 1100

a|b = 0011 1101

a^b = 0011 0001

~a = 1100 0011

Logical Operators

Assume Boolean variables A holds true and variable B holds false, then

Assignment Operators:

The assignment operators are supported by Java language.

Miscellaneous Operators

There are few other operators supported by Java Language.

• Conditional Operator ( ? : )
• Conditional operator is also known as the ternary operator.
• This operator consists of three operands and is used to evaluate Boolean expressions.
• The goal of the operator is to decide, which value should be assigned to the variable.

The operator is written as:
variable x = (expression) ? value if true : value if false

instanceof Operator

• This operator is used only for object reference variables.
• The operator checks whether the object is of a particular type (class type or interface type).

instanceof operator is written as:
( Object reference variable ) instanceof (class/interface type)

• If the object referred by the variable on the left side of the operator passes the IS-A check for the class/interface type on the right side, then the result will be true.
• Arithmetic Compound Assignment Operators In Java

Consider General Syntax:
num1 = num1 + 2
Now after using arithmetic Compound Assignment Statement , Equivalent Statement for above statement is written as:
num1 += 2

• Step 1 : Write Statement (With using Arithmetic Operator inside Two Operands)
• Step 2 : Write Arithmetic Operator before Assignment Sign.
• Step 3 : Remove First Operand which is same as “Left Value”.
• Step 4 : We will get Arithmetic Compound Assignment Statement Expression.

Examples :

Arithmetic Compound Assignment Operators

Example 1:

class WikitechyCompoundAssignment {
  public static void main(String args[]) {
    int a = 4;
    int b = 5;
    int c = 3;

    a += 1;
    b *= 1;
    c %= 1;

    System.out.println("a = " + a);
    System.out.println("b = " + b);
    System.out.println("c = " + c);
  }
}

OUTPUT:
a = 5
b = 5
c = 0

Example 2:

class WikitechyCompoundAssignmentDemo {
  public static void main(String args[]) {
    int a = 4;
    int b = 5;
    int c = 6;

    a += b * c;

    System.out.println("a = " + a);
  }
}

Output :

a = 34

Explanation :

• We have used multiplication Operator inside Expression.
• Multiplication Operator have High Priority than Compound Assignment.
• It will be executed first and after completing multiplication , Value is Added with “a”.