java笔记9之switch

 1 import java.util.Scanner;
 2 
 3 class SwitchDemo2 {
 4     public static void main(String[] args) {
 5         //创建键盘录入对象
 6         Scanner sc = new Scanner(System.in);
 7         
 8         //控制键盘录入数据
 9         System.out.println("请输入一个数据(1-7):");
10         int week = sc.nextInt(); //3
11         
12         //定义常量
13         //int number = 3;
14         //然后把case后面的值改为number，就会报错
15         
16         //switch判断语句
17         switch(week) {
18             case 1:
19                 System.out.println("星期一");
20                 break;
21             case 2:
22                 System.out.println("星期二");
23                 break;
24             case 3:
25                 System.out.println("星期三");
26                 break;
27             case 4:
28                 System.out.println("星期四");
29                 break;
30             case 5:
31                 System.out.println("星期五");
32                 break;
33             case 6:
34                 System.out.println("星期六");
35                 break;
36             case 7:
37                 System.out.println("星期日");
38                 break;
39             default:
40                 System.out.println("你输入的数据有误");
41                 //break;
42         }
43     }
44 }