package leetcode.single_number;

public class Solution {
	public int singleNumber(int[] A) {
        int ans = 0;
        for(int i : A){
            ans ^= i;
        }
        return ans;
    }
}

Add java solution for 136. Single Number
Add java solution for 136. Single Number

136. Single Number: https://leetcode.com/problems/single-number/