Date before() method in Java with Examples
Last Updated :
02 Jan, 2019
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The before() method of Java Date class tests whether the date is before the specified date or not.
Syntax:
Java
Java
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:
// 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));
}
}
// Java code to demonstrate// before() function of Date classimport 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)); }}
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
// 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);
}
}
}
// Java code to demonstrate// before() function of Date classimport 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); } }}
Output:
Date 1: Wed Jan 02 08:15:06 UTC 2019 Date 1: null On checking these 2 dates: Exception: java.lang.NullPointerException
