题解 | #字符串加密#

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);
        while (in.hasNext()) { 
            String key = in.next();
            String value = in.next();
            char[] chars = key.toLowerCase().toCharArray();
            char[] dict = new char[26];
            int index=0;
            tag1:
            for(char ch : chars){
                for(int i=0;i<index;i++){
                    if(ch==dict[i]){
                        continue tag1;
                    }
                }
                dict[index]=ch;
                index++;
            }
            char ch = 'a';
            tag2:
            for(int i=0;i<26;i++){
                for(int j=0;j<index;j++){
                    if(dict[j]==ch){
                        ch++;
                        continue tag2;
                    }
                }
                dict[index]=ch;
                index++;
                ch++;

            }
            char[] res = value.toCharArray();
            for(int i=0;i<res.length;i++){
                if(res[i]-'a'>=0){
                    res[i] = dict[res[i]-'a'];
                }else{
                    res[i] = dict[res[i]-'A'];
                }
            }
            System.out.println(String.valueOf(res));
        }
    }
}