java源码告诉你哪年二月有几天

package month12;


import java.util.Calendar;
import java.util.Scanner;


public class CalendarTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc = new Scanner(System.in);
System.out.println("请输入年份： ");
int year = sc.nextInt();

Calendar c = Calendar.getInstance();
c.set(year,2,1);
c.add(Calendar.DATE, -1);

System.out.println(c.get(Calendar.DATE));



}


}