题解 | #判断是否为回文字符串#

import java.util.*;


public class Solution {
    public boolean judge (String str) {
        int c = str.length()-1>>1;
        int s1 = c-str.length()%2;
        int s2 = c+1;
        while(s1>=0 && s2<str.length()){
            if(str.charAt(s1--)!=str.charAt(s2++)){
                return false;
            }
        }
        return true;
    }
}