java输入年份和月份，输出天数
import java.util.Scanner;
/**
* Switch case 实现从键盘录入年份月份，输出天数
*/
public class Test02 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入年份：");
int year = sc.nextInt();
System.out.println("请输入月份：");
int month = sc.nextInt();
switch (month){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
System.out.println(year+"年"+month+"月有31天");
break;
case 4:
case 6:
case 9:
case 11:
System.out.println(year+"年"+month+"月有30天");
break;
case 2:
if (year%4==0&&year%100!=0||year%400==0){
System.out.println(year+"年"+month+"月有29天");
}else {
System.out.println(year+"年"+month+"月有28天");
}
break;
default:
System.out.println("月份有误");
}
sc.close();
}
}