switch的用法

Switch的用法

一、语句格式

switch(表达式){

case值1：

​ 语句体1；

​ break;

case值2：

​ 语句体2；

​ break;

…

default:

​ 语句体n+1；

​ [break;]

}

代码演示：

```java

```java
package com.slxy;
import java.util.Scanner;
public class SwitchTest {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入数字1——7");
        int week = sc.nextInt();
        switch (week){
            case 1:
            System.out.println("星期一" );
            break;
            case 2:
                System.out.println("星期二");
                break;
            case 3:
                System.out.println("星期三" );
                break;
            case 4:
                System.out.println("星期四" );
                break;
            case 5:
                System.out.println("星期五" );
                break;
            case 6:
                System.out.println("星期六" );
                break;
            case 7:
                System.out.println("星期天" );
                break;
            default:
                System.out.println("你输入的信息有误");
                break;
        }
    }
}

```java
package com.slxy;
import java.util.Scanner;
public class switchdemo {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入月份");
        int mood = sc.nextInt();
        switch (mood){
            case 1:
            case 2:
            case 12:
                System.out.println("冬季");
                break;
            case 3:
            case 4:
            case 5:
                System.out.println("春季");
                break;
            case 6:
            case 7:
            case 8:
                System.out.println("夏季");
                break;
            case 9:
            case 10:
            case 11:
                System.out.println("秋季");
                break;
            default:
                System.out.println("你输入的月份有误，请检查");
        }
    }
}