2023.7.9

 1 //选择结构
 2 public class Main
 3 {
 4     public static void main(String[] args)
 5     {
 6         Scanner scanner = new Scanner(System.in);
 7         System.out.println("请输入内容：");
 8         String s = scanner.nextLine();
 9         if(s.equals("Hello"))//equals判断字符串是否相等
10         {
11             System.out.println("Hello");
12         }
13         System.out.println("end");
14         scanner.close();
15     }
16 }
17 
18 
19 public class test
20 {
21     public static void main(String[] args)
22     {
23         Scanner scanner = new Scanner(System.in);
24         String s = scanner.nextLine();
25         switch(s)
26         {
27             case "袁天罡":
28                 System.out.println("参见大帅");
29                 break;
30             case "李星云":
31                 System.out.println("天暗星");
32                 break;
33             case "姬如雪":
34                 System.out.println("思如雪");
35                 break;
36             default:
37                 System.out.println("你干嘛");
38                 break;
39         }
40         scanner.close();
41     }
42 }