Palindrome.java

// Java implementation of the approach
public class Solution {

  // Function that returns true if
  // str is a palindrome
  static boolean isPalindrome(String str) {

    // Pointers pointing to the beginning
    // and the end of the string
    int i = 0, j = str.length() - 1;

    // While there are characters toc compare
    while (i < j) {

      // If there is a mismatch
      if (str.charAt(i) != str.charAt(j))
        return false;

      // Increment first pointer and
      // decrement the other
      i++;
      j--;
    }

    // Given string is a palindrome
    return true;
  }

  // Driver code
  public static void main(String[] args) {
    String str = "geeks";

    if (isPalindrome(str))
      System.out.print("Yes");
    else
      System.out.print("No");
  }
}