题解 | #两数之和#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param numbers int整型一维数组 
     * @param target int整型 
     * @return int整型一维数组
     */
    public int[] twoSum (int[] numbers, int target) {
        // write code here

        int [] res = new int[2];
        Map<Integer, Integer> map = new HashMap<>();
        for(int i = 0; i<numbers.length; i++) {
            if(map.containsKey(numbers[i])) {
                res[0] = map.get(numbers[i]) + 1;
                res[1] = i + 1;
            } else {
                map.put((target - numbers[i]), i);
            }
        }
        String result = "";
        for(int i = 0; i< res.length; i++) {
            String element = String.valueOf(res[i]);
            result += element;
            if( i != res.length - 1) {
                result += ",";
            }
        }
        System.out.println(result);
        return res;
    }
}