题解 | #字符串字符匹配#

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 str1 = in.nextLine();
        String str2 = in.nextLine();

        int flag = 0;

        // 遍历所有字符
        for (int i = 0; i < str1.length(); i++) {
            flag = 0;
            //判断是否出现过
            for (int j = 0; j < str2.length(); j++) {
                if (str1.charAt(i) == str2.charAt(j)) {
                    flag = 1;
                    break;
                }
            }
            if (flag == 0) {
                System.out.print("false");
                return;
            }
        }

        if (flag == 1) {
            System.out.print("true");
        }
    }
}