1. TemporalAdjusters
Example to move a date to firstDayOfMonth, firstDayOfNextMonth, next Monday and etc.
TestDate.java
package com.mkyong.time; import java.time.DayOfWeek; import java.time.LocalDate; import java.time.temporal.TemporalAdjusters; public class TestDate { public static void main(String[] args) { LocalDate localDate = LocalDate.now(); System.out.println("current date : " + localDate); LocalDate with = localDate.with(TemporalAdjusters.firstDayOfMonth()); System.out.println("firstDayOfMonth : " + with); LocalDate with1 = localDate.with(TemporalAdjusters.lastDayOfMonth()); System.out.println("lastDayOfMonth : " + with1); LocalDate with2 = localDate.with(TemporalAdjusters.next(DayOfWeek.MONDAY)); System.out.println("next monday : " + with2); LocalDate with3 = localDate.with(TemporalAdjusters.firstDayOfNextMonth()); System.out.println("firstDayOfNextMonth : " + with3); } } Output
current date : 2016-11-15firstDayOfMonth : 2016-11-01lastDayOfMonth : 2016-11-30next monday : 2016-11-21 firstDayOfNextMonth : 2016-12-01
Note Please check this for the entire list of the predefined TemporalAdjusters.
2. Custom TemporalAdjuster
Example to implement TemporalAdjuster to move a date to next Christmas.
NextChristmas.java
package com.mkyong.time; import java.time.temporal.ChronoField; import java.time.temporal.Temporal; import java.time.temporal.TemporalAdjuster; public class NextChristmas implements TemporalAdjuster { @Override public Temporal adjustInto(Temporal temporal) { return temporal.with(ChronoField.MONTH_OF_YEAR, 12).with(ChronoField.DAY_OF_MONTH, 25); } } TestDate.java
package com.mkyong.time; import java.time.LocalDate; public class TestDate { public static void main(String[] args) { LocalDate localDate = LocalDate.now(); System.out.println("current date : " + localDate); localDate = localDate.with(new NextChristmas()); System.out.println("Next Christmas : " + localDate); } } Output
current date : 2016-11-15Next Christmas : 2016-12-25
Alternatively, you can use the following lambda expression :
localDate = localDate.with( temporal -> temporal.with(ChronoField.MONTH_OF_YEAR, 12).with(ChronoField.DAY_OF_MONTH, 25) ); http://www.mkyong.com/java8/java-8-temporaladjusters-examples/