Example: Reverse String using StringBuilder in Java

// Reverse String using StringBuilder

public class Main {
    public static void main(String[] args) {
        // Step 1: Define the original string
        String originalString = "Hello, World!";
        System.out.println("Original String: " + originalString);

        // Step 2: Create a StringBuilder instance from the original string
        // StringBuilder is mutable, allowing its content to be modified.
        StringBuilder stringBuilder = new StringBuilder(originalString);

        // Step 3: Reverse the content of the StringBuilder
        // The reverse() method modifies the StringBuilder in-place.
        stringBuilder.reverse();

        // Step 4: Convert the reversed StringBuilder back to an immutable String
        String reversedString = stringBuilder.toString();

        // Step 5: Print the reversed string
        System.out.println("Reversed String: " + reversedString);

        System.out.println("\n--- Another Example ---");
        String textToReverse = "Java Programming";
        System.out.println("Original: " + textToReverse);
        String reversedText = new StringBuilder(textToReverse).reverse().toString();
        System.out.println("Reversed: " + reversedText);
    }
}