Java学习_007_Switch语句

需求：输入一到七的任意一个数，输出该数字对应的星期数。

使用Switch语句：

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4     public static void main(String[] args) {
 5         Scanner sc = new Scanner(System.in);
 6         System.out.println("请输入一个星期数（1-7）:");
 7         int week = sc.nextInt();
 8 
 9         switch (week){
10             case 1:
11                 System.out.println("星期一");
12                 break;
13             case 2:
14                 System.out.println("星期二");
15                 break;
16             case 3:
17                 System.out.println("星期三");
18                 break;
19             case 4:
20                 System.out.println("星期四");
21                 break;
22             case 5:
23                 System.out.println("星期五");
24                 break;
25             case 6:
26                 System.out.println("星期六");
27                 break;
28             case 7:
29                 System.out.println("星期日");
30                 break;
31             default:
32                 System.out.println("您输入的星期数有误！");
33                 break;
34         }
35     }
36 }

结果：

使用if语句：

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4     public static void main(String[] args) {
 5         Scanner sc = new Scanner(System.in);
 6         System.out.println("请输入一个星期数（1-7）:");
 7         int week = sc.nextInt();
 8 
 9         if (week == 1){
10             System.out.println("星期一");
11         }else
12         if (week == 2){
13             System.out.println("星期二");
14         }else
15         if (week == 3){
16             System.out.println("星期三");
17         }else
18         if (week == 4){
19             System.out.println("星期四");
20         }else
21         if (week == 5){
22             System.out.println("星期五");
23         }else
24         if (week == 6){
25             System.out.println("星期六");
26         }else
27         if (week == 7){
28             System.out.println("星期日");
29         }else {
30             System.out.println("您输入的星期数有误！");
31         }
32     }
33 }