Java.lang.Integer.reverse() Method

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Description

The java.lang.Integer.reverse() method returns the value obtained by reversing the order of the bits in the two's complement binary representation of the specified int value.

Declaration

Following is the declaration for java.lang.Integer.reverse() method

public static int reverse(int i)

Parameters

i − This is the int value.

Return Value

This method returns the value obtained by reversing order of the bits in the specified int value.

Exception

NA

Example

The following example shows the usage of java.lang.Integer.reverse() method.

package com.tutorialspoint;

import java.lang.*;

public class IntegerDemo {

   public static void main(String[] args) {

      int i = 170;
      System.out.println("Number = " + i);

      /* returns the string representation of the unsigned integer value 
         represented by the argument in binary (base 2) */
      System.out.println("Binary = " + Integer.toBinaryString(i));

      // returns the number of one-bits 
      System.out.println("Number of one bits = " + Integer.bitCount(i)); 

      /*  returns the value obtained by reversing order of the bits in 
         the specified int value */ 
      System.out.println("After reversing = " + Integer.reverse(i));
   }
} 

Let us compile and run the above program, this will produce the following result −

Number = 170
Binary = 10101010
Number of one bits = 4
After reversing = 1426063360