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Language: Java
Expertise: Intermediate
Apr 30, 2019
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Expore the TemporalAdjusters Class in Java

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();
   public void proceed() 
      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

M S Sridhar
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