Java 2 day 

 1 package Joker;
 2 /*
 3 * StringBuilder
 4 * StringBuilder append(String str):在原有字符串末尾加给定字符串str
 5 * StringBuilder replace(int 1,int 2,String 3):用3替换原字符串中1之间的内容
 6 * StringBuilder reverse():反转
 7 * toString():StringBuilder转化成String
 8 */
 9 public class Biu {
10 　　public static void main(String[] args) {
11 
12 
13 　　StringBuilder a=new StringBuilder("abc");
14 　　a.append("def");
15 　　System.out.println(a);
16 　　a.replace(1, 3, "hf");
17 　　System.out.println(a);
18 　　a.reverse();
19 　　System.out.println(a);
20 　　a.toString();
21 　　}
22 }

 

 1 package Joker;
 2 import java.util.Scanner;
 3 public class Show {
 4     public static void main(String[] args) {
 5         Scanner hf=new Scanner(System.in);
 6         String xxx=hf.nextLine();
 7         StringBuilder show=new StringBuilder(xxx);
 8         if(show.reverse().toString().equals(xxx)){
 9             System.out.println("答对了");
10         }else{
11             System.out.println("惊喜");
12         }
13     }
14 }

 

posted @ 2021-04-09 15:05  WakkJoker  阅读(38)  评论(0)    收藏  举报