题解 | #简单密码#

用replaceAll和ASCII码判断

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);
        // 注意 hasNext 和 hasNextLine 的区别
        // while (in.hasNextInt()) { // 注意 while 处理多个 case
        //     int a = in.nextInt();
        //     int b = in.nextInt();
        //     System.out.println(a + b);
        // }
        String str=in.nextLine();
        char[] scre=str.toCharArray();
        
        str=str.replaceAll("a|b|c","2");
        str=str.replaceAll("d|e|f","3");
        str=str.replaceAll("g|h|i","4");
        str=str.replaceAll("j|k|l","5");
        str=str.replaceAll("m|n|o","6");
        str=str.replaceAll("p|q|r|s","7");
        str=str.replaceAll("t|u|v","8");
        str=str.replaceAll("w|x|y|z","9");
        for(int i=0;i<str.length();i++){
            char temp1=str.charAt(i);
            if(temp1>=65&&temp1<=90){
                if(temp1!=90){
                    char temp2=(char)(temp1+33);
                    str=str.replace(temp1,temp2);
                }else
                {
                    char temp2=97;
                    str=str.replace(temp1,temp2);
                }
                
            }
        }
        System.out.println(str);

    }
}

}