题解 | #简单密码#

Java

public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String str = in.nextLine();
        StringBuilder sb = new StringBuilder();
        int len = str.length();
        for(int i = 0; i < len; i++){
            char ch = str.charAt(i);
            if(ch >= 'A' && ch <= 'Z'){
                int t = (int)(ch - 'A');
                int index = ((int)(ch - 'A') + 1) % 26;
                char ch2 = (char)(index + (int)'a');
                sb.append(ch2);
            }else if(ch >= 'a' && ch <= 'o'){
                int num = (((int)(ch - 'a')) / 3) + 2;
                sb.append(num);
            }else if(ch >= 'p' && ch <= 's'){
                sb.append(7);
            }else if(ch >= 't' && ch <= 'v'){
                sb.append(8);
            }else if(ch >= 'w' && ch <= 'z'){
                sb.append(9);
            }else{
                sb.append(ch);
            }
        }
        System.out.print(sb);
    }
}