题解 | #整型数组合并#

import java.util.*;
import java.util.stream.Collectors;

public class Main {
    static ArrayList<Integer> arr1;
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n1 = in.nextInt();
        arr1 = new ArrayList<>();
        for (int i = 0; i < n1; i++) {
            arr1.add(in.nextInt());
        }
        int n2 = in.nextInt();
        for (int i = 0; i < n2; i++) {
            arr1.add(in.nextInt());
        }
        List<Integer> collect = arr1.stream().distinct().sorted().collect(
                                    Collectors.toList());
        StringBuffer stringBuffer = new StringBuffer();
        for (Integer integer : collect) {
            stringBuffer.append(integer);
        }
        System.out.println(stringBuffer);
    }
}

解题思路:

1, 将所有整数, 放置到一个集合中, 然后进行相应的去重和排序操作