With this example we are going to demonstrate how to check if Days and Calendars match. We are using the org.apache.commons.lang3.time.DateUtils Class, that is a suite of utilities surrounding the use of the Calendar and Date object. DateUtils contains a lot of common methods considering manipulations of Dates or Calendars. In short, to check if Days and Calendars match you should:

• Create two new Date objects.
• Use isSameDay(Date date1, Date date2) API method of DateUtils to check if the two date objects are on the same day ignoring time.
• Then create two new Calendar objects.
• Use isSameDay(Calendar cal1, Calendar cal2) API method of DateUtils to check if two calendar objects are on the same day ignoring time.

Let’s take a look at the code snippet that follows:  

package com.javacodegeeks.snippets.core;

import org.apache.commons.lang3.time.DateUtils;
 
import java.util.Calendar;
import java.util.Date;
 
public class CheckDays {
    public static void main(String[] args) {

  Date date1 = new Date();

  Date date2 = new Date();
 

  System.out.print("Date 1 = " + date1 + " and Date 2 = " +date2);

  

  // Check if two instances of Date are the same 

  if (DateUtils.isSameDay(date1, date2)) {


System.out.println(" ->Dates match");

  }

  else 

  	System.out.println(" ->Dates not match");

  	

  Calendar cal1 = Calendar.getInstance();

  Calendar cal2 = Calendar.getInstance();
 

  System.out.print("Calendar 1 = " + date1 + " and Calendar 2 = " +date2);

  

  // Check if two instances of Calendar are the same 

  if (DateUtils.isSameDay(cal1, cal2)) {

  	System.out.println(" ->Calendars match");

  }

  else 

  	System.out.println(" ->Calendars not match");
 

  // Change month o the second calendar and test the values

  cal2.add(Calendar.DAY_OF_MONTH, 10);

  System.out.print("Calendar 1 = " + date1 + " and Calendar 2 = " +date2);

  if (DateUtils.isSameDay(cal1, cal2)) {

  	System.out.println(" ->Calendars match");

  }

  else 

  	System.out.println(" ->Calendars not match");
    }
}

Output:

Date 1 = Fri Jul 13 12:52:26 EEST 2012 and Date 2 = Fri Jul 13 12:52:26 EEST 2012 ->Dates match
Calendar 1 = Fri Jul 13 12:52:26 EEST 2012 and Calendar 2 = Fri Jul 13 12:52:26 EEST 2012 ->Calendars match
Calendar 1 = Fri Jul 13 12:52:26 EEST 2012 and Calendar 2 = Fri Jul 13 12:52:26 EEST 2012 ->Calendars don't match

  
This was an example of how to check if Days and Calendars match in Java.