leecode刷题（8）-- 两数之和

import java.util.Arrays;

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

    public static void main(String[] args) {
        int[] nums = {2, 7, 11, 15};
        TwoSum twoSum = new TwoSum();
        int[] result = twoSum.twoSum(nums,9);
        System.out.println(Arrays.toString(result));
    }
}