题解 | 字符串加密

import java.util.*;

// 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 s = in.nextLine();
        String t = in.nextLine();
        char[] charArray1 = s.toCharArray();
        Set<Character> set = new HashSet<>();
        StringBuilder sb = new StringBuilder();
        StringBuilder result = new StringBuilder();
        for(char c : charArray1){
            if(set.add(c)){
                sb.append(c);
            }
        }
        for(int i = 0;i <26;i++){
            char x = (char) ('a'+i);
            if(sb.indexOf(x+"") < 0){
                sb.append(x);
            }
        }
        for(int i = 0;i < t.length();i++){
            int index = t.charAt(i)-'a';
            result.append(sb.charAt(index));
        }
        System.out.println(result);
    }
}