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Java 8 Time API Example: MonthDay, Month, OffsetDateTime and OffsetTime

By Arvind Rai, October 18, 2014
MonthDay, Month, OffsetDateTime and OffsetTime has been introduced in Java 8 in time API. MonthDay represents the combination of month and day. Month is an enum that stores all the fields of month. OffsetDateTime represents date and time with offset and OffsetTime represents time with offset

java.time.MonthDay

MonthDay represents the combination of the month and day. This class does not provide year. In the example I am showing some uses and working of MonthDay.
MonthDayDemo.java
package com.cp.time;
import java.time.MonthDay;
public class MonthDayDemo {
	public static void main(String[] args) {
		MonthDay mday = MonthDay.now();
		System.out.println(mday.getDayOfMonth());
		System.out.println(mday.getMonth());
		System.out.println(mday.atYear(2014));
	}
} 
Find the output. Output
11
SEPTEMBER
2014-09-11 

java.time.Month

Month is an enum and represents the complete months of the year. Find the uses of Month enum.
MonthDemo.java
package com.cp.time;
import java.time.Month;
public class MonthDemo {
	public static void main(String[] args) {
		System.out.println(Month.MARCH);
		System.out.println(Month.MARCH.getValue());
		System.out.println(Month.of(3));
		System.out.println(Month.valueOf("MARCH"));
	}
} 
Find the output. Output
MARCH
3
MARCH
MARCH 

java.time.OffsetDateTime

OffsetDateTime represents all date and time fields. This class represents date and time with an offset. Find the uses of the OffsetDateTime.
OffsetDateTimeDemo.java
package com.cp.time;
import java.time.OffsetDateTime;
public class OffsetDateTimeDemo {
	public static void main(String[] args) {
		OffsetDateTime offsetDT = OffsetDateTime.now();
		System.out.println(offsetDT.getDayOfMonth());
		System.out.println(offsetDT.getDayOfYear());
		System.out.println(offsetDT.getDayOfWeek());
		System.out.println(offsetDT.toLocalDate());
	}
} 
Find the output. Output
11
254
THURSDAY
2014-09-11 

java.time.OffsetTime

OffsetTime represents time with an offset that can be viewed as hour-minute-second-offset. Find the use of OffsetTime.
OffsetTimeDemo.java
package com.cp.time;
import java.time.OffsetTime;
public class OffsetTimeDemo {
	public static void main(String[] args) {
	  OffsetTime offTime = OffsetTime.now();
	  System.out.println(offTime.getHour() +" hour");
	  System.out.println(offTime.getMinute() +" minute");
	  System.out.println(offTime.getSecond() +" second");
	}
} 
Find the output Output
16 hour
39 minute
24 second 
POSTED BY
ARVIND RAI
ARVIND RAI
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