题解 | 字符串加密

import java.util.ArrayList;
import java.util.LinkedHashSet;
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.hasNextLine()) { // 注意 while 处理多个 case
            // int a = in.nextInt();
            // int b = in.nextInt();
            // System.out.println(a + b);
            String s = in.nextLine();
            String t = in.nextLine();

            LinkedHashSet<Character> lSet = new LinkedHashSet<>();
            for (char c : s.toCharArray()) {
                lSet.add(c);
            }
            for (char c = 'a';c<='z';c++) {
                lSet.add(c);
            }
            ArrayList<Character> list = new ArrayList<>(lSet);

            for (char c : t.toCharArray()) {
                System.out.print(list.get(c - 'a'));
            }
        }
    }
}