题解HJ21 | #简单密码#

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);

        String s = in.nextLine();

        StringBuilder result = new StringBuilder();

        for (int i = 0; i < s.length(); i++) {
            if ('1' == s.charAt(i))
                result.append(1);
            else if ('a' == s.charAt(i) || 'b' == s.charAt(i) || 'c' == s.charAt(i))
                result.append(2);
            else if ('d' == s.charAt(i) || 'e' == s.charAt(i) || 'f' == s.charAt(i))
                result.append(3);
            else if ('g' == s.charAt(i) || 'h' == s.charAt(i) || 'i' == s.charAt(i))
                result.append(4);
            else if ('j' == s.charAt(i) || 'k' == s.charAt(i) || 'l' == s.charAt(i))
                result.append(5);
            else if ('m' == s.charAt(i) || 'n' == s.charAt(i) || 'o' == s.charAt(i))
                result.append(6);
            else if ('p' == s.charAt(i) || 'q' == s.charAt(i) || 'r' == s.charAt(i) ||
                     's' == s.charAt(i))
                result.append(7);
            else if ('t' == s.charAt(i) || 'u' == s.charAt(i) || 'v' == s.charAt(i))
                result.append(8);
            else if ('w' == s.charAt(i) || 'x' == s.charAt(i) || 'y' == s.charAt(i) ||
                     'z' == s.charAt(i))
                result.append(9);
            else if ('0' == s.charAt(i))
                result.append(0);
            else if (Character.isUpperCase(s.charAt(i)) && 'Z' != s.charAt(i))
                result.append((char) (Character.toLowerCase(s.charAt(i)) + 1));
            else if ('Z' == s.charAt(i))
                result.append('a');
            else result.append(s.charAt(i));
        }

        System.out.println(result);
    }
}