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Java program to swap bytes of an integer number

Given/input an integer number, we have to swap bytes of an integer number.
Submitted by Nidhi, on March 06, 2022

Problem statement

In this program, we will read an integer variable and swap bytes of the given number using bitwise operators.

Source Code

The source code to swap bytes of an integer number is given below. The given program is compiled and executed successfully.

// Java program to swap bytes of 
// an integer number

import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    int num = 0x4567;

    System.out.printf("Number before swapping : %04X\n", num);

    num = ((num << 8) & 0xff00) | ((num >> 8) & 0x00ff);

    System.out.printf("Number after swapping : %04X\n", num);
  }
}

Output

Number before swapping : 4567
Number after swapping : 6745

Explanation

In the above program, we imported the "java.util.Scanner" package to read input from the user. And, created a public class Main. It contains a static method main().

The main() method is an entry point for the program. Here, we created a variable num initialized with 0X4567. Then we swapped the bytes of the number and printed the result.

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