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 ofDateUtilsto 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 ofDateUtilsto 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.
