Example: String Reversal using Two Pointers in Java

// String Reversal using Two Pointers
public class Main {
    public static void main(String[] args) {
        String originalString = "interview";
        
        // Step 1: Convert the string to a character array
        char[] charArray = originalString.toCharArray();
        
        // Step 2: Initialize two pointers
        int left = 0;
        int right = charArray.length - 1;

        // Step 3: Swap characters until pointers meet or cross
        while (left < right) {
            // Step 3a: Swap charArray[left] and charArray[right]
            char temp = charArray[left];
            charArray[left] = charArray[right];
            charArray[right] = temp;

            // Step 3b: Move pointers towards the center
            left++;
            right--;
        }
        
        // Step 4: Convert the modified char array back to a String
        String reversedString = new String(charArray);

        System.out.println("Original String: " + originalString);
        System.out.println("Reversed String: " + reversedString);
    }
}