leetcode260 260. Single Number III

package leetcode;

public class Solution260 extends Solution {
    @Override
    public void test() {
        int[] nums = {1, 2};
        int[] ints = singleNumber(nums);
        for (int anInt : ints) {
            System.out.println(anInt);
        }
    }

    public int[] singleNumber(int[] nums) {
if (nums.length < 2) return new int[]{};
        if (nums.length < 3) {
            return nums;
        }

        int pro = 0;
        for(int i=0; i<nums.length; i++){
            pro ^= nums[i];
        }
        int idx = 1;
        while((pro & idx) == 0){
            idx <<= 1;
        }
        int res1 = 0, res2 = 0;
        for(int i=0; i<nums.length; i++){
            if ((nums[i] & idx) != 0) {
                res1 ^= nums[i];
            }else{
                res2 ^= nums[i];
            }
        }        
　　　　　return new int[]{res1, res2};
    }
}