SECRET

 

7877708574708274728174838A78707C70717470848378758

47B7678817B8A857481888574818871747084837875847B8A

 

package junit_test;

import java.util.Scanner;

//字母--暗文转换
public class Change {
    
    public static String a2n(char a){
        String b = "FF";
        if(a == 'a' || a == 'A'){
            b = "70";
        }
        else if(a == 'b' || a == 'B'){
            b = "71";
        }
        else if(a == 'c' || a == 'C'){
            b = "72";
        }
        else if(a == 'd' || a == 'D'){
            b = "73";
        }
        else if(a == 'e' || a == 'E'){
            b = "74";
        }
        else if(a == 'f' || a == 'F'){
            b = "75";
        }
        else if(a == 'g' || a == 'G'){
            b = "76";
        }
        else if(a == 'h' || a == 'H'){
            b = "77";
        }
        else if(a == 'i' || a == 'I'){
            b = "78";
        }
        else if(a == 'j' || a == 'J'){
            b = "79";
        }
        else if(a == 'k' || a == 'K'){
            b = "7A";
        }
        else if(a == 'l' || a == 'L'){
            b = "7B";
        }
        else if(a == 'm' || a == 'M'){
            b = "7C";
        }
        else if(a == 'n' || a == 'N'){
            b = "7D";
        }
        else if(a == 'o' || a == 'O'){
            b = "7E";
        }
        else if(a == 'p' || a == 'P'){
            b = "7F";
        }
        else if(a == 'q' || a == 'Q'){
            b = "80";
        }
        else if(a == 'r' || a == 'R'){
            b = "81";
        }
        else if(a == 's' || a == 'S'){
            b = "82";
        }
        else if(a == 't' || a == 'T'){
            b = "83";
        }
        else if(a == 'u' || a == 'U'){
            b = "84";
        }
        else if(a == 'v' || a == 'V'){
            b = "85";
        }
        else if(a == 'w' || a == 'W'){
            b = "86";
        }
        else if(a == 'x' || a == 'X'){
            b = "87";
        }
        else if(a == 'y' || a == 'Y'){
            b = "88";
        }
        else if(a == 'z' || a == 'Z'){
            b = "89";
        }
        else if(a == ',' || a == '.'){
            b = "8A";
        }
        else if(a == ' '){
            b = "8B";
        }
        else b = "8C";
        return b;
    }
    
    public static char n2a(String a){
        char b = '0';
        if(a.equals("70")){
            b = 'a';
        }
        else if(a.equals("71")){
            b = 'b';
        }
        else if(a.equals("72")){
            b = 'c';
        }
        else if(a.equals("73")){
            b = 'd';
        }
        else if(a.equals("74")){
            b = 'e';
        }
        else if(a.equals("75")){
            b = 'f';
        }
        else if(a.equals("76")){
            b = 'g';
        }
        else if(a.equals("77")){
            b = 'h';
        }
        else if(a.equals("78")){
            b = 'i';
        }
        else if(a.equals("79")){
            b = 'j';
        }
        else if(a.equals("7A")){
            b = 'k';
        }
        else if(a.equals("7B")){
            b = 'l';
        }
        else if(a.equals("7C")){
            b = 'm';
        }
        else if(a.equals("7D")){
            b = 'n';
        }
        else if(a.equals("7E")){
            b = 'o';
        }
        else if(a.equals("7F")){
            b = 'p';
        }
        else if(a.equals("80")){
            b = 'q';
        }
        else if(a.equals("81")){
            b = 'r';
        }
        else if(a.equals("82")){
            b = 's';
        }
        else if(a.equals("83")){
            b = 't';
        }
        else if(a.equals("84")){
            b = 'u';
        }
        else if(a.equals("85")){
            b = 'v';
        }
        else if(a.equals("86")){
            b = 'w';
        }
        else if(a.equals("87")){
            b = 'x';
        }
        else if(a.equals("88")){
            b = 'y';
        }
        else if(a.equals("89")){
            b = 'z';
        }
        else if(a.equals("8A")){
            b = '.';
        }
        else if(a.equals("8B")){
            b = ' ';
        }
        else b = '.';
        return b;
    }

    public static void write(){
        System.out.println("  ========================================" );
        System.out.println("============================================");
        System.out.println("                  请输入原文,并以“#”结束：" );
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine(); 
        char c[]=str.toCharArray(); 
        int i = 0;
        System.out.println("============================================");
        System.out.println("  ========================================" );
        System.out.println("                      叮咚~ 转换成功啦~" );
        System.out.print("   " );
        for(i = 0; c[i] != '#'&& i < 1000; i++){
            String s = a2n(c[i]);
            System.out.print( s );
        }
        System.out.println(" ");
    }
    
    private static void read() {
        System.out.println("  ========================================" );
        System.out.println("============================================");
        System.out.println("                  请输入暗文,并以“#”结束：" );
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine(); 
        char c[]=str.toCharArray(); 
        int i = 0;
        System.out.println("============================================");
        System.out.println("  ========================================" );
        System.out.println("                      叮咚~ 转换成功啦~" );
        System.out.print(" " );
        for(i = 0; c[i] != '#'&& i < 2000; i = i + 2){
            String s = str.substring(i, i+2);
            char m = n2a(s);
            System.out.print(m);
        }
        System.out.println(" ");
        
    }
    
    public static void main(String[] args) {
        System.out.println("  ========================================" );
        System.out.println("============================================");
        System.out.println("           您好，欢迎进入字母--暗文转换系统。" );
        System.out.println(" 请按照指示使用本系统。如有出错，请重启本系统。");
        System.out.println("============================================");
        System.out.println("  ========================================" );
        int b = 0;
        while(b != 3){
            System.out.println("        ——————————————————————————" );
            System.out.println("        |   请选择您所需要的操作： |");
            System.out.println("        |   1.原文转换                     |" );
            System.out.println("        |   2.暗文解读                     |" );
            System.out.println("        |   3.退出系统                     |" );
            System.out.println("        ——————————————————————————" );
            Scanner sc = new Scanner(System.in);
            b = sc.nextInt(); 
            if(b == 1){
                write();
            }
            else if(b == 2){
                read();
            }
            System.out.println("  ========================================" );
            System.out.println("============================================");
            System.out.println("  ========================================" );
        }
        System.out.println("                              感谢使用！" );
        System.out.println("  ========================================" );
        System.out.println("============================================");
        System.out.println("  ========================================" );
    }


}