Example: Reverse Number using StringBuilder in Java

// Reverse Number using StringBuilder
import java.util.Scanner;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Step 1: Get input from the user
        System.out.print("Enter a number to reverse: ");
        int originalNumber = scanner.nextInt();

        // Step 2: Convert the number to a String
        String numberAsString = String.valueOf(originalNumber);

        // Step 3: Use StringBuilder to reverse the string
        StringBuilder stringBuilder = new StringBuilder(numberAsString);
        stringBuilder.reverse();

        // Step 4: Convert the reversed string back to an integer
        int reversedNumber = Integer.parseInt(stringBuilder.toString());

        // Step 5: Print the reversed number
        System.out.println("Original number: " + originalNumber);
        System.out.println("Reversed number: " + reversedNumber);

        scanner.close();
    }
}