java.lang.Long reverseBytes(long i)


The Long.reverseBytes(long i) java method returns the value obtained by reversing the order of the bytes in the two’s complement representation of the specified long value.

Make a note that the reverseBytes() method of Long class is static thus it should be accessed statically which means the we would be calling this method in this format:

Long.reverseBytes(method args)

Non static method is usually called by just declaring method_name(argument) however in this case since the method is static, it should be called by appending the class name as suffix. We will be encountering a compilation problem if we call the java reverseBytes method non statically.

Method Syntax

public static int reverseBytes(long i)

Method Argument

Data Type Parameter Description
long i the value whose bytes are to be reversed

Method Returns

The reverseBytes(long i) method of Long class returns the value obtained by reversing the bytes in the specified long value.


Requires Java 1.5 and up

Java Long reverseBytes(long i) Example

Below is a simple java example on the usage of reverseBytes(long i) method of Long class.


import java.util.Scanner;

 * This example source code demonstrates the use of  
 * reverseBytes(long i) method of Long class

public class LongReverseBytesExample {

	public static void main(String[] args) {

		// Ask for user input
		System.out.print("Enter a value:");

		// declare a scanner object to read the user input
		Scanner s = new Scanner(;

		// assign the input to a variable
		long value = s.nextLong();

		// get the value obtained by reversing the order of the bytes in the
		// two's complement representation
		long result = Long.reverseBytes(value);

		// print the result
		System.out.println("Result:" + result);

		// close the scanner object



Sample Output

Below is the sample output when you run the above example.

Java Long reverseBytes(long i) example output