题解 | #整型数组合并#

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int array_length1 = Integer.parseInt(scanner.nextLine());
        String[] strArray1 = scanner.nextLine().split(" ");
        int array_length2 = Integer.parseInt(scanner.nextLine());
        String[] strArray2 = scanner.nextLine().split(" ");
        List<Integer> lists = new ArrayList<>();
        for (String s : strArray1) {
            if (!lists.contains(Integer.parseInt(s))) {
                lists.add(Integer.parseInt(s));
            }
        }
        for (String s : strArray2) {
            if (!lists.contains(Integer.parseInt(s))) {
                lists.add(Integer.parseInt(s));
            }
        }
        Collections.sort(lists, new Comparator<Integer>() {
            @Override
            public int compare(Integer o1, Integer o2) {
                return o1 - o2;
            }
        });
        StringBuilder stringBuilder = new StringBuilder();
        for (Integer s : lists) {
            stringBuilder.append(String.valueOf(s));
        }
        System.out.println(stringBuilder.toString());
    }
}