剑指 Offer II 004. 只出现一次的数字-java

直接暴力破解

 public static int singleNumber(int[] nums){
        int length = nums.length;
        int k;
        int result = 0;
        for (int i = 0;i < length;i ++){
            k = 1;
            for (int j = 0;j < length;j ++){
                    if(nums[i] == nums[j]){
                        if(i != j){
                            k ++;
                        }
                }
            }
            if (k == 1)result = nums[i];
        }
        return result;
    }