Java Reference
In-Depth Information
Listing 12-13.
Using Year, YearMonth, and MonthDay Partials
// Partials.java
package com.jdojo.datetime;
import java.time.Month;
import java.time.MonthDay;
import java.time.Year;
import java.time.YearMonth;
public class Partials {
public static void main(String[] args) {
// Use Year
Year y1 = Year.of(2012); // 2012
Year y2 = y1.minusYears(1); // 2011
Year y3 = y1.plusYears(1); // 2013
Year y4 = Year.now(); // current year
if (y1.isLeap()) {
System.out.println(y1 + " is a leap year.");
}
else {
System.out.println(y1 + " is not a leap year.");
}
// Use YearMonth
YearMonth ym1 = YearMonth.of(2012, Month.MAY); // 2012-05
// Get the number of days in the month
int monthLen = ym1.lengthOfMonth(); // 31
System.out.println("Days in month in " + ym1 + ": " + monthLen);
// Get the number of days in the year
int yearLen = ym1.lengthOfYear(); // 366
System.out.println("Days in year in " + ym1 + ": " + yearLen);
// Use MonthDay
MonthDay md1 = MonthDay.of(Month.DECEMBER, 25);
MonthDay md2 = MonthDay.of(Month.FEBRUARY, 29);
if (md2.isValidYear(2009)) {
System.out.println(md2 + " occurred in 2009");
}
else {
System.out.println(md2 + " did not occur in 2009");
}
}
}
2012 is a leap year.
Days in month in 2012-05: 31
Days in year in 2012-05: 366
--02-29 did not occur in 2009.
