题解 | #字符串加密#

import java.util.ArrayList;
import java.util.List;
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);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) { // 注意 while 处理多个 case
            char[] key = in.next().toCharArray();
            char[] str = in.next().toCharArray();
            StringBuilder sb = new StringBuilder();
            List<Character> encryptTable = new ArrayList<>();
            for (char c : key) {
                if (!encryptTable.contains(c)) {
                    encryptTable.add(c);
                }
            }
            for (int i = 0; i < 26; ++i) {
                char temp = (char) ('a' + i);
                if (!encryptTable.contains(temp)) {
                    encryptTable.add(temp);
                }
            }
            for (int i = 0; i < str.length; ++i) {
                int index = str[i] - 'a';
                sb.append(encryptTable.get(index));
            }
            System.out.println(sb);
        }
    }
}