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 (int i) Method

Syntax:

Parameter:

Returns:

Exceptions:

Compatibility Version:

Example 1

Example 2

Example 3

Example 4

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