两数之和5.30：

两数之和（字符串法）：

class Solution {
    public int[] twoSum(int[] nums, int target) {
        int[] temp = {0, 0}; // 初始化为默认值
        boolean is = false;
        for (int i = 0; i < nums.length; i++) {
            for (int j = i + 1; j < nums.length; j++) {
                if (nums[i] + nums[j] == target) {
                    temp = new int[]{i, j}; // 找到匹配，更新temp
                    is = true;
                    break;
                }
            } 
            if(is) break;
        }
        return temp;
    }
}