简单的switch语句------（1）季节判断 （2）计算器

（1）季节判断 

package cn.itcast.day;
import java.util.Scanner;
public class Demo9 {
    public static void main(String[] args) {
        int x = 3;
        switch (x) {
            case 3:
            case 4:
            case 5:
                System.out.println("spring");
                break;
            case 6:
            case 7:
            case 8:
                System.out.println("sunmer");
                break;
            case 9:
            case 10:
            case 11:
                System.out.println("autumn");
                break;
            case 12:
            case 0:
            case 1:
                System.out.println("winter");
            default:
                System.out.println("ok");
                break;
        }
    }
}

运行结果

spring

Process finished with exit code 0

（2）计算器

package cn.itcast.day;
import java.util.Scanner;
public class Demo9 {
    public static void main(String[] args) {
        int x = 1, y = 2;
        char ch = '-';
        switch (ch) {
            case '+':
                System.out.println("x*y=" + (x + y));
                break;
            case '-':
                System.out.println("x-y=" + (x - y));
                break;
            case '*':
                System.out.println("x*y=" + (x * y));
                break;
            case '/':
                System.out.println("x/y=" + (x / y));
                break;
            default:
                System.out.println("不靠谱");
        }
    }
}

运行结果：

x-y=-1

Process finished with exit code 0