编辑代码

import java.util.*;
class Main {
    public static int[] twoSum(int[] nums, int target) {
        Map<Integer, Integer> map = new HashMap<>();
        int n = nums.length;
        for(int i=0; i<n; i++){
            map.put(nums[i], i);
        }
        for(int i=0; i<n; i++){
            if(map.containsKey(target-nums[i])){
                return new int[]{i, map.get(target-nums[i])};
            }
        }
        return new int[]{-1, -1};
    }
    
	public static void main(String[] args) {
        int[] nums = new int[]{2,7,11,15};
        int target = 9;
        int[] ans = twoSum(nums, target);
        System.out.println(Arrays.toString(ans));
	}
}