Leetcode ---两数之和

直接上JAVA代码：

class Solution {
    public int[] twoSum(int[] nums, int target) {
        int firstIndex = 0;
        int secondIndex = 0;
        int [] result = new int[2];
        for(int i = 0; i < nums.length; i++){
            for(int j = i + 1; j < nums.length; j++){
                if(nums[i] + nums[j] == target){
                    firstIndex = i;
                    secondIndex = j;
                }
            }
        }
        result[0] = firstIndex;
        result[1] = secondIndex;
        return result;
    }
}