Shift Operator in Java

• Last Updated : 26 Oct, 2021

Operators in Java are used to performing operations on variables and values.

Examples of operators: +, -, *,  /,  >>, <<.

Types of operators:

• Arithmetic Operator,
• Shift Operator,
• Relational Operator,
• Bitwise Operator,
• Logical Operator,
• Ternary Operator and
• Assignment Operator.

In this article, we will mainly focus on the Shift Operators in Java.

By shifting the bits of its first operand right or left, a shift operator performs bit manipulation on data. The shift operators available in the Java programming language are listed below. The shift operator is a java operator that is used to shift bit patterns right or left.

1. SignedLeft Shift Operator in Java

This operator is represented by a symbol <<, read as double less than.

Syntax:

left_operand  <<  number

Description:

Calculate the value of number<<2 if number=2.

When the value of a number is shifted to the left two places, the leftmost two bits are lost. The number has a value of two. 0010 is the binary representation of the number 2. In the following example, the method for doing a left shift is explained:

In the example above, the binary number 0010 (in decimal 2) becomes 1000 after shifting the bits to the left (in decimal 8).

Example:

Java

 // Java program to demonstrate// the Signed left shift operatorimport java.io.*;  class GFG {    public static void main(String[] args)    {        int number = 2;                  // 2 bit left shift operation        int Ans = number << 2;                 System.out.println(Ans);    }}
Output
8

2. Signed Right Shift Operator in Java

The Right Shift Operator moves the bits of a number a given number of places to the right. The >> sign represents the right shift operator, which is understood as double greater than. When you type x>>n, you tell the computer to move the bits x to the right n places.

When we shift a number to the right, the least significant bits (rightmost) are deleted, and the sign bit is filled in the most considerable place (leftmost).

Syntax:

left_operand  >>  number

Description:

Calculate the value of number>>2 if number=8.

When the value of a number is shifted to the right two places, the rightmost two bits are lost. The number has a value of eight. 1000 is the binary representation of the number 8. The following is an example of how to perform the right shift:

In the example above, the binary number 1000 (in decimal 8) becomes 0010 after shifting the bits to the right (in decimal 2).

Example:

Java

 // Java program to demonstrate// the Signed right shift operatorimport java.io.*;  class GFG     {    public static void main (String[] args) {    {                 int number = 8;                // 2 bit signed right shift        int Ans = number >> 2;                System.out.println(Ans);        }}
Output
2

3. Unsigned Right Shift Operator in Java

Unsigned Right Shift Operator moves the bits of the integer a given number of places to the right. The sign bit was filled with 0s. The Bitwise Zero Fill Right Shift Operator is represented by the symbol >>>.

Syntax:

left_operand  >>>  number

Java

 // Java program to demonstrate// the Unsigned right shift operatorimport java.io.*;  class GFG     {    public static void main (String[] args)     {        byte num1 = 8;        byte num2 = -8;               System.out.println(num1 >>> 2);            System.out.println(num2 >>> 2);        }}
Output
2
1073741822

Note: For negative bits, the signed and unsigned right shift operators provide different results.

4. Unsigned Left Shift Operator in Java

Unlike unsigned Right Shift, there is no “<<<” operator in Java because the logical (<<) and arithmetic left-shift (<<<) operations are identical.

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