I need to implement a function in Java that tests rather the user input string is character based palindrome using queues. How do I edit this code to achieve this:

public class isPalindrome $\{$

public static boolean isPalindrome$($String str$)$

$\{$

$//$test for end of recursion

if$($str$.$length$()<2)\{$return true;$\}$

$//$check first and last character for equality

if$($str$.$charAt$(0)!=$ str$.$charAt$($str$.$length$()-1))\{$return false;$\}$

$//$recursion call

return isPalindrome$($str$.$substring$(1,$ str$.$length$()-1))$;