题解 | #字符串加密#

import java.util.Scanner;
import java.util.ArrayList;
import java.util.List;

// 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);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) { // 注意 while 处理多个 case
            String key = in.next();
            String str = in.next();
            System.out.println(encode(key,str));
        }

    }
    private static String encode(String key, String str) {
        List<Character> list = new ArrayList<>();
        for (int i = 0; i < key.length(); i++) {
            if (!list.contains(key.charAt(i))){
                list.add(key.charAt(i));
            }
        }
        for (int i = 0; i < 26; i++) {
            char c = (char) ((char) i+97);
            if (!list.contains(c)){
                list.add(c);
            }
        }
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < str.length(); i++) {
            stringBuilder.append(list.get(str.charAt(i)-97));
        }
        return stringBuilder.toString();
    }
}