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package peace.learn.java.programming; / * @author Created by Peace */ public class Palindrome { public static boolean isPalindrome(String str) { if (str == null || str.length() == 0) { return false; } int len = str.length(); char[] charArr = str.toCharArray(); for (int i = 0; i < len >> 1; i++) { if (charArr[i] != charArr[len - 1 - i]) { return false; } } return true; } public static void main(String[] args) { System.out.println(isPalindrome("hj56k65jh")); System.out.println(isPalindrome("hj56k69h")); System.out.println(isPalindrome("")); System.out.println(isPalindrome(null)); } } /* Output: true false false false */
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