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AC代码：
public class Solution { public int hammingDistance(int x, int y) { return Integer.toString(x^y,2).replaceAll("0","").length(); } }
题目来源： https://leetcode.com/problems/hamming-distance/
LeetCode之461. Hamming Distance
原文：http://www.cnblogs.com/cc11001100/p/6240408.html