力扣第一题，两数之和

class Solution {
    public int[] twoSum(int[] nums, int target) {
        int temp;
        int arr = new int[2];
        for(int i = 0; i < nums.length;i++){
            for(int j = i+1;j < nums.length-i-1;j++){
                temp = nums[i]+nums[j];
                if(target == temp){
                    // System.out.println("["+i+","+j+"]");
                    arr[i] = i;
                    arr[j] = j;
                }
            }
        }
        return arr;
    }
}

上面就是我的代码，执行成功，我以为自己解决了，于是提交了，结果系统给我的多余一种结果的数组，系统报错，我的arr数组超出容量。

当我把数组的容量改为4，系统出现一个巨长的测试数组

[230,863,916,585,981,404,316,785,88,12,70,435,384,778,887,755,740,337,86,92,325,422,815,650,920,125,277,336,221,847,168,23,677,61,400,136,874,363,394,199,863,997,794,587,124,321,212,957,764,173,314,422,927,783,930,282,306,506,44,926,691,568,68,730,933,737,531,180,414,751,28,546,60,371,493,370,527,387,43,541,13,457,328,227,652,365,430,803,59,858,538,427,583,368,375,173,809,896,370,789] 

？？这是想弄死我的arr数组吗？？？

偷偷的看了一下官方的代码

public int[] twoSum(int[] nums, int target) {
    for (int i = 0; i < nums.length; i++) {
        for (int j = i + 1; j < nums.length; j++) {
            if (nums[j] == target - nums[i]) {
                return new int[] { i, j };
            }
        }
    }
    throw new IllegalArgumentException("No two sum solution");
}

我的代码很弱！