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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 Solution:

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

Program/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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