太简单了，发现大家都懒得做

import java.util.Scanner;

// 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 in = new Scanner(System.in);
        String string1 = in.next();
        String string2 = in.next();
        char[] charArray1 = string1.toCharArray();
        int count = 0;
        for (int i = 0; i < charArray1.length; i++) {
            if (string2.indexOf(charArray1[i]) != -1) {
                count++;
            }
        }
        if (count == string1.length()) {
            System.out.println(true);
        } else {
            System.out.println(false);
        }
    }
}