java输出每月有多少天

package test;public class DateTest {public static void main(String[] args) {System.out.println(DateTest.getDay(2000, 2));}public static int getDay(int year,int month){int day = 0;switch (month) {case 1:case 3:case 5:case 7:case 8:case 10:case 12:day = 31;break;case 4:case 6:case 9:case 11: day = 30;break;default:if((year%4==0&&year%100!=0)||year%400==0)day = 29;elseday = 28;break;}return day;}}