题解 | #回文昵称#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param s string字符串 
     * @return bool布尔型
     */
    public boolean isPalindromeNickname (String s) {
        // write code here
        int left = 0;
        int right = s.length() - 1;
        s = s.toLowerCase();
        while(left < right){
            while(!Character.isLetterOrDigit(s.charAt(left))){
                left++;
            }
            while(!Character.isLetterOrDigit(s.charAt(right))){
                right--;
            }
            if(s.charAt(left) == s.charAt(right)){
                left++;
                right--;
            }
            else{
                return false;
            }
        }
        return true;
    }
}