TemporalAdjusters
is a class in Java that is oriented towards bettering the options of Calendar. You can easily compute the dates of firstDayOfNextMonth
, lastDayOfMonth
, next Wednesday, etc.
TemporalAdjusters
have many more methods defined and it is good to explore a few of them yourself. The API is available at https://docs.oracle.com/javase/8/docs/api/java/time/temporal/TemporalAdjusters.html.
import java.time.LocalDate;
import java.time.DayOfWeek;
import java.time.temporal.TemporalAdjusters;
public class UnderstandingTemporalAdjusters
{
public static void main(String args[]) {
UnderstandingTemporalAdjusters understandingTemporalAdjusters = new UnderstandingTemporalAdjusters();
understandingTemporalAdjusters.proceed();
}
public void proceed()
{
//Today
LocalDate today = LocalDate.now();
System.out.println("Today's date: " + today);
//Last day of current month
LocalDate lastDayOfMonth = today.with(TemporalAdjusters.lastDayOfMonth());
System.out.println("lastDayOfMonth : " + lastDayOfMonth);
//First day of next month
LocalDate firstDayOfNextMonth = today.with(TemporalAdjusters.firstDayOfNextMonth());
System.out.println("firstDayOfNextMonth : " + firstDayOfNextMonth);
//Next Wednesday
LocalDate nextWednesday = today.with(TemporalAdjusters.next(DayOfWeek.WEDNESDAY));
System.out.println("Next Wednesday is on: " + nextWednesday);
}
}
/*
Expected output:
[root@mypc]# java UnderstandingTemporalAdjusters
Today's date: 2019-02-21
lastDayOfMonth : 2019-02-28
firstDayOfNextMonth : 2019-03-01
Next Wednesday is on: 2019-02-27
*/
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