Java Calendar before() Method

java.util.Calendar.before() is a method in Calendar class of java.util package. The method returns true if the time represented by this Calendar is before the time represented by when Object. If it is not the case, false is returned.

Syntax

Parameter

When - when is the Object that is to be compared.

Returns

This method return True or false value

Throws

Example 1

import java.util.Calendar;
import java.util.Date;
public class CalendarbeforeExample1 {
    	 public static void main(String[] args) {
   // create calendar objects.
       Calendar cal = (Calendar) Calendar.getInstance();
      Calendar past = (Calendar) Calendar.getInstance();
      // print the current date
      System.out.println("Current date: " + cal.getTime());
      // change year in future calendar
      past.set(Calendar.YEAR, 2015);
      System.out.println("Year is " + past.get(Calendar.YEAR));
      // check if calendar date is after current date
      Date time = past.getTime();
           if (past.before(cal)) {
         System.out.println("Date " + time + " is before current date.");
      }
   }
}

Output:

Current date: Mon Jul 30 04:08:30 PDT 2018
Year is 2015
Date Thu Jul 30 04:08:30 PDT 2015 is before current date.

Example 2

import java.util.Calendar;
import java.util.Date;
public class CalendarbeforeExample2 {   
public static void main(String[] args) {  
     // create calendar objects.
       Calendar cal = (Calendar) Calendar.getInstance();
     Calendar cal2 = (Calendar) Calendar.getInstance();
      // print the current date
      System.out.println("Current date: " + cal.getTime());
      // change year in future calendar
      cal2.set(Calendar.MONTH, 4);
      System.out.println("Year is " + cal2.get(Calendar.MONTH));
      // check if calendar date is after current date
      Date time = cal2.getTime();     
      if (cal2.before(cal)) {
         System.out.println("Date " + time + " is before current date.");
      }
   }
}

Output:

Current date: Mon Jul 30 04:13:04 PDT 2018
Year is 4
Date Wed May 30 04:13:04 PDT 2018 is before current date.

Example 3

import java.util.Calendar;
import java.util.Date;
public class CalendarbeforeExample3 {
public static void main(String[] args) {
      // create calendar objects.
       Calendar cal = (Calendar) Calendar.getInstance();
      Calendar cal3 = (Calendar) Calendar.getInstance();
      // print the current date
      System.out.println("Current date: " + cal.getTime());
      // change year in future calendar
      cal3.set(Calendar.DAY_OF_MONTH, 23);
      System.out.println("Year is " + cal3.get(Calendar.DAY_OF_MONTH));
      // check if calendar date is after current date
      Date time = cal3.getTime();
      if (cal3.before(cal)) {
         System.out.println("Date " + time + " is before current date.");
      }   
  }   
 }

Output:

Current date: Mon Jul 30 06:19:04 PDT 2018
Year is 23
Date Mon Jul 23 06:19:04 PDT 2018 is before current date.

Example 4

import java.util.Calendar;
import java.util.Date;
public class CalendarbeforeExample4 {    
public static void main(String[] args) {   
      // create calendar objects.
       Calendar cal = (Calendar) Calendar.getInstance();
      Calendar cal3 = (Calendar) Calendar.getInstance();
      // print the current date
      System.out.println("Current date: " + cal.getTime());
      // change year in future calendar
      cal3.set(Calendar.HOUR, 30);
      System.out.println("Now date is  " + cal3.getTime());
       cal3.set(Calendar.MINUTE, 60);
      System.out.println("Now date is  " + cal3.getTime());  
       cal3.set(Calendar.SECOND, 30);
      System.out.println("Now date is  " + cal3.getTime());    
      // check if calendar date is after current date
      Date time = cal3.getTime();     
      if (cal3.before(cal)) {
         System.out.println("Date " + time + " is after current date.");
      }
}
}

Output:

Current date: Mon Jul 30 06:23:37 PDT 2018
Now date is  Tue Jul 31 06:23:37 PDT 2018
Now date is  Tue Jul 31 07:00:37 PDT 2018
Now date is  Tue Jul 31 07:00:30 PDT 2018

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