作业帮：给定一个整数数组，找出其中两个数相加等于目标值（去重set）

题目描述

给定一个整数数组，找出其中两个数相加等于目标值

输入　　

[1,3,5,7,9,11]
10

输出
1,9
3,7

 

代码：

import java.util.HashMap;
import java.util.HashSet;
import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        String[] vals= str.substring(1, str.length()-1).split(",");
        int[] num = new int[vals.length];
        for (int i = 0; i < num.length; i++) {
            num[i] = Integer.valueOf(vals[i]);
        }
        int sum = sc.nextInt();
        HashSet<Integer> set = getNums(num, sum);
        for (Integer integer : set) {
            System.out.println(integer + "," + (sum-integer));
        }
        
    }
    public static HashSet<Integer> getNums(int[] num, int sum){
        HashMap<Integer,Integer> map = new HashMap<Integer,Integer>();
        HashSet<Integer> set = new HashSet<Integer>();
        for (int i = 0; i < num.length; i++) {
            map.put(num[i], i);
        }
        for (int i = 0; i < num.length; i++) {
            int value = sum - num[i];
            if(map.containsKey(value) && sum != 2*value){
                if(!(set.contains(num[i])||set.contains(value))){
                    set.add(num[i]);
                    continue;
                }
            }
        }
        return set;
    }
}