题解 | 字符串字符匹配

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 scan = new Scanner(System.in);
        while (scan.hasNext()) {
            String shortStr = scan.nextLine().trim();
            String longStr = scan.nextLine().trim();
            if ("exit".equalsIgnoreCase(shortStr) || "exit".equalsIgnoreCase(longStr)) {
                break;
            }
            Set set1  = new HashSet<>();
            Set set2  = new HashSet<>();
            for (char c : shortStr.toCharArray()) {
                set1.add(c);
            }
            for (char c : longStr.toCharArray()) {
                set2.add(c);
            }
            if (set2.containsAll(set1)) {
                System.out.println("true");
            } else {
                System.out.println("false");
            }
        }
        scan.close();
    }
}