Java에서 특정 연도의 특정 달의 일수를 찾는 방법은 무엇입니까?

public int getActualMaximum(int field)

import java.util.*; public class NoOfDaysInAMonthOfAYearTest { public static void main(String []args) { for (int i = 2000; i < 2018; i++) { Calendar calendar = new GregorianCalendar(i, Calendar.FEBRUARY, 1); int numberOfDays = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); System.out.println("February " + i + ": " + numberOfDays + " days"); } } }

February 2000: 29 days February 2001: 28 days February 2002: 28 days February 2003: 28 days February 2004: 29 days February 2005: 28 days February 2006: 28 days February 2007: 28 days February 2008: 29 days February 2009: 28 days February 2010: 28 days February 2011: 28 days February 2012: 29 days February 2013: 28 days February 2014: 28 days February 2015: 28 days February 2016: 29 days February 2017: 28 days