Home  >  Java 8

Java 8 Time API Example: Period, Year, YearMonth and ZonedDateTime

By Arvind Rai, October 31, 2014
This page provides example of java 8 API like Period, Year, YearMonth and ZonedDateTime. These are new classes introduced in java 8. Period represents a time period. Year class represents an year and in the same way YearMonth represents year and month. ZonedDateTime represents date and time with zone. Find the example for these classes.

java.time.Period

Period is the amount of time in different unit like year, month or days. An example of period can be like 1 year 5 month 10 days.
PeriodDemo.java
package com.cp.time;
import java.time.LocalDate;
import java.time.Period;
public class PeriodDemo {
	public static void main(String[] args) {
		LocalDate start = LocalDate.now();
		System.out.println("Period.between:"+Period.between(start, LocalDate.MAX).getDays());
		System.out.println("Period.ofDays:"+Period.ofDays(5).getDays());
	}
} 
Find the output.
Period.between:19
Period.ofDays:5 

java.time.Year

Year class represents year like 2014. This class plays only with year. We can use it to know leap year or can fetch the current year.
YearDemo.java
package com.cp.time;
import java.time.Year;
public class YearDemo {
	public static void main(String[] args) {
		System.out.println("Year.now():"+Year.now());		
		System.out.println("Year.MAX_VALUE:"+Year.MAX_VALUE);
		System.out.println("Year.isLeap(2014):"+Year.isLeap(2014));
		System.out.println("Year.isLeap(2016):"+Year.isLeap(2016));
	}
} 
Find the output.
Year.now():2014
Year.MAX_VALUE:999999999
Year.isLeap(2014):false
Year.isLeap(2016):true 

java.time.YearMonth

YearMonth is the class that represents the combination of year and month like 2014-09. This class provides methods to get year and month for a given date string.
YearMonthDemo.java
package com.cp.time;
import java.time.YearMonth;
public class YearMonthDemo {
	public static void main(String[] args) {
		System.out.println("YearMonth.now():"+YearMonth.now());
		System.out.println("getMonthValue():"+YearMonth.parse("2014-09").getMonthValue());		
		System.out.println("getYear():"+YearMonth.parse("2014-09").getYear());
		System.out.println("isLeapYear():"+YearMonth.parse("2014-09").isLeapYear());		
	}
} 
Find the output.
YearMonth.now():2014-09
getMonthValue():9
getYear():2014
isLeapYear():false 

java.time.ZonedDateTime

ZonedDateTime class represents date and time with zone. The example can be 2014-09-12T18:32:29.636+05:30[Asia/Calcutta]. This class provides the methods to get year, month, day, hour, minute, seconds and zone offset.
ZonedDateTimeDemo.java
package com.cp.time;
import java.time.ZonedDateTime;
public class ZonedDateTimeDemo {
	public static void main(String[] args) {
		System.out.println(ZonedDateTime.now());
		ZonedDateTime zdt = ZonedDateTime.parse("2014-09-12T10:15:30+01:00[Europe/Paris]");
		System.out.println("getDayOfYear:"+zdt.getDayOfYear());
		System.out.println("zdt.getYear():"+zdt.getYear());
	}
} 
Find the output.
2014-09-12T18:32:29.636+05:30[Asia/Calcutta]
getDayOfYear:255
zdt.getYear():2014 
POSTED BY
ARVIND RAI
ARVIND RAI
FIND MORE TUTORILAS


©2019 concretepage.com | Privacy Policy | Contact Us