Date before() method in Java with Examples

The before() method of Java Date class tests whether the date is before the specified date or not.

Syntax:

public boolean before(Date when)

Parameters: The function accepts a single parameter when which specifies the date that has to be checked.

Return Value: It returns a Boolean value. It will return true if this date is before the specified date otherwise false.

Exception: The function throws a single exception that is NullPointerException if when is null.

Program below demonstrates the above mentioned function:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate
// before() function of Date class
  
import java.util.Date;
import java.util.Calendar;
public class GfG {
    // main method
    public static void main(String[] args)
    {
  
        // creating a Calendar object
        Calendar c = Calendar.getInstance();
  
        // set Month
        // MONTH starts with 0 i.e. ( 0 - Jan)
        c.set(Calendar.MONTH, 11);
  
        // set Date
        c.set(Calendar.DATE, 05);
  
        // set Year
        c.set(Calendar.YEAR, 1996);
  
        // creating a date object with specified time.
        Date dateOne = c.getTime();
  
        System.out.println("Date 1: " + dateOne);
  
        // creating a date of object
        // storing the current date
        Date currentDate = new Date();
  
        System.out.println("Date 2: " + currentDate);
  
        System.out.println("Is Date 2 before Date 1: "
                         + currentDate.before(dateOne));
    }
}

chevron_right


Output:

Date 1: Thu Dec 05 08:15:01 UTC 1996
Date 2: Wed Jan 02 08:15:01 UTC 2019
Is Date 2 before Date 1: false
filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate
// before() function of Date class
  
import java.util.Date;
  
public class GfG {
    // main method
    public static void main(String[] args)
    {
  
        // creating a date of object
        // storing the current date
        Date currentDate = new Date();
  
        System.out.println("Date 1: " + currentDate);
  
        // specifiedDate is assigned to null.
        Date specifiedDate = null;
  
        System.out.println("Date 1: " + specifiedDate);
  
        System.out.println("On checking these 2 dates: ");
  
        try {
            // throws NullPointerException
            System.out.println(currentDate
                                   .before(specifiedDate));
        }
        catch (Exception e) {
            System.out.println("Exception: " + e);
        }
    }
}

chevron_right


Output:

Date 1: Wed Jan 02 08:15:06 UTC 2019
Date 1: null
On checking these 2 dates: 
Exception: java.lang.NullPointerException


My Personal Notes arrow_drop_up

Contented with little yet wishing for more

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.