public class Palindrome {

 public boolean checkPalindrome(String chkString) {

  /*
   * StringBuilder is Not Thread Safe, but one can do the same, using
   * StringBuffer which is Thread Safe, but in places where Thread Safety
   * is not needed, prefer using StringBuilder as it will not create
   * unnecessary overheads.
   */

  StringBuilder sb = new StringBuilder(chkString);

  String s_1 = sb.reverse().toString();

  // ---- Use equals() if you want the result to be case sensitive

  if (!chkString.equalsIgnoreCase(s_1)) {

   return false;

  }

  return true;

 }

 public static void main(String[] args) {

  boolean isE = new Palindrome().checkPalindrome("Aba");

  if (isE == true) {

   System.out.println("Its a palindrome");

  }

  else if (isE == false) {

   System.out.println("Its not a palidrome");

  }

 }

}