Java Integer reverseBytes() method with Examples

by Online Tutorials Library July 22, 2014

Java Integer reverseBytes (int i) Method

The reverseBytes() method of Java Integer class numerically returns the value obtained by reversing the order of the bytes in the 2’s complement binary representation of the specified integer value.

Syntax:

Following is the declaration of reverseBytes() method:

Parameter:

DataType	Parameter	Description	Required/Optional
int	i	Integer value whose bytes are to be reversed.	Required

Returns:

The reverseBytes() method returns the numeric value obtained by reversing order of the bytes in the specified int value.

Exceptions:

Compatibility Version:

Java 1.5 and above

Example 1

  public class IntegerReverseBytesExample1 {  public static void main(String[] args) {        int i = 202;        System.out.println(“Number = ” + i);        //returns the value obtained by reversing order of the bytes in the specified int value        System.out.println(“After reversing = ” + Integer.reverseBytes(i));      }  }  

Test it Now

Output:

Number = 202  After reversing = -905969664

Example 2

  import java.util.Scanner;  public class IntegerReverseBytesExample2 {  public static void main(String[] args) {      System.out.print(“Enter Integer Value: “);      Scanner readInput = new Scanner(System.in);      int i = readInput.nextInt();      readInput.close();      System.out.println(“Number = ” + i);      // returns the integer value in binary               System.out.println(“Binary Representation = ” + Integer.toBinaryString(i));      //returns the value obtained by reversing order of the bytes in the specified int value      System.out.println(“After reversing = ” + Integer.reverseBytes(i));      }  }  

Output:

Enter Integer Value: 208  Number = 208  Binary Representation = 11010000  After reversing = -805306368

Example 3

  public class IntegerReverseBytesExample3 {  public static void main(String[] args) {        int a = 202;        int b = -50;        System.out.println(“Number = ” + a);                 System.out.println(“Binary Representation = ” + Integer.toBinaryString(a));              System.out.println(“After reversing = ” + Integer.reverseBytes(a));        System.out.println(“nNumber = ” + b);                 System.out.println(“Binary Representation = ” + Integer.toBinaryString(b));              System.out.println(“After reversing = ” + Integer.reverseBytes(b));      }  }  

Test it Now

Output:

Number = 202  Binary Representation = 11001010  After reversing = -905969664    Number = -50  Binary Representation = 11111111111111111111111111001110  After reversing = -822083585

Example 4

  import java.util.Scanner;  public class LongReverseBytesExample4 {  public static void main(String[] args) {  System.out.print(“Enter Number from console: “);  Scanner sc = new Scanner(System.in);  // assign the input to a variable  long value = sc.nextLong();  // get the value by reversing the order of the bytes   long result = Long.reverseBytes(value);  // print the result  System.out.println(“Result: ” + result);  sc.close();  }  }  

Output:

Enter Number from console: 850  Result: 5909567136040222720

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Java Integer reverseBytes() method with Examples

Java Integer reverseBytes (int i) Method

Syntax:

Parameter:

Returns:

Exceptions:

Compatibility Version:

Example 1

Example 2

Example 3

Example 4

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