leetcode oj1

新get

1、java异常处理  ppt：https://wenku.baidu.com/view/c29c06c489eb172ded63b7bf.html?from=search

throw new IllegalArgumentException("No two sum solution");

中文：https://leetcode-cn.com/problems/two-sum/solution/

英文：https://leetcode.com/problems/two-sum/description/

2、java数组定义

int【】 nums

return new int[] {i,j}