Example: Reverse String using Character Array in Java

// Reverse String using Character Array
public class Main {
    public static void main(String[] args) {
        // Step 1: Define the original string
        String originalString = "madam";

        // Step 2: Convert the string to a character array
        char[] charArray = originalString.toCharArray();

        // Step 3: Initialize two pointers: 'left' at the start, 'right' at the end
        int left = 0;
        int right = charArray.length - 1;

        // Step 4: Loop until the pointers cross each other
        while (left < right) {
            // Swap characters at the left and right positions
            char temp = charArray[left];
            charArray[left] = charArray[right];
            charArray[right] = temp;

            // Move pointers inward
            left++;
            right--;
        }

        // Step 5: Convert the modified character array back to a String
        String reversedString = new String(charArray);

        // Step 6: Print the original and reversed strings
        System.out.println("Original String: " + originalString);
        System.out.println("Reversed String: " + reversedString);
    }
}