【leetcode389】389. Find the Difference

异或 找不同 —。—

public class Solution {
    public char findTheDifference(String s, String t) {
        char temp = 0x00;
        for(int i = 0;i < s.length();i++){
            temp =(char) (temp ^ s.charAt(i));
        }
        for(int i = 0;i < t.length();i++){
            temp =(char) (temp ^ t.charAt(i));
        }
        return temp;
    }
}