string palindrome in java without using inbuilt function or method code example

Example 1: Java program to check whether string is palindrome using library methods

public class StringPalindromeJava
{
   public static void isPalindrome(String str)
   {
      String strReverse = new StringBuffer(str).reverse().toString();
       // checking for palindrome
      if(str.equals(strReverse))
      {
         System.out.println(str + " is palindrome string.");
      }
      else
      {
         System.out.println(str + " is not palindrome string.");
      }
   }
   public static void main(String[] args)
   {
      // palindrome java
      isPalindrome("eye");
      isPalindrome("rotator");
   }
}

Example 2: String palindrome in java using stringbuffer

// String palindrome in java using stringbuffer
public class PalindromeUsingStringBuffer
{
   public static void main(String[] args)
   {
      String strInput = "nayan";
      StringBuffer sb = new StringBuffer(strInput);
      sb.reverse();
      String str = sb.toString();
      if(strInput.equals(str))
      {
         System.out.println("string is palindrome.");
      }
      else
      {
         System.out.println("string is not palindrome.");
      }
   }
}