Java Calendar isSet() Method

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Description

The Java Calendar isSet(int field) method checks if the given calendar field has a value set. Cases that the value has been set by internal fields calculations triggered by a get method call are included.

Declaration

Following is the declaration for java.util.Calendar.isSet method

public final boolean isSet(int field)

Parameters

field − The field to be checked.

Return Value

This method returns true if the given calendar field has a value set; false otherwise.

Exception

NA

Checking Day of Month if Set or Not in a Current Dated Calendar Instance Example

The following example shows the usage of Java Calendar isSet() method. We're creating an instance of a Calendar of current date using getInstance() method and printing the date and time using getTime() method and checking a field is set or not. As next step, we're clearing that field, again print the date and set flag.

package com.tutorialspoint;

import java.util.Calendar;

public class CalendarDemo {
   public static void main(String[] args) {
   
      // create a calendar    
      Calendar cal = Calendar.getInstance();

      // print the time
      System.out.println("Date And Time Is: " + cal.getTime());
	  
      // determine if the given calendar field has a value set
      System.out.println("Day of month is set: " + cal.isSet(Calendar.DAY_OF_MONTH));
      
      cal.clear(Calendar.DAY_OF_MONTH);
      
      // print the time
      System.out.println("Date And Time Is: " + cal.getTime());
	  
      // determine if the given calendar field has a value set
      System.out.println("Day of month is set: " + cal.isSet(Calendar.DAY_OF_MONTH));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Date And Time Is: Tue Sep 27 10:42:26 IST 2022
Day of month is set: true
Date And Time Is: Tue Sep 27 10:42:26 IST 2022
Day of month is set: false

Checking Day of Month if Set or Not in a Current Dated GregorianCalendar Instance Example

The following example shows the usage of Java Calendar isSet() method. We're creating an instance of a Calendar of current date using GregorianCalendar() method and printing the date and time using getTime() method and checking a field is set or not. As next step, we're clearing that field, again print the date and set flag.

package com.tutorialspoint;

import java.util.Calendar;
import java.util.GregorianCalendar;

public class CalendarDemo {
   public static void main(String[] args) {
   
      // create a calendar    
      Calendar cal = new GregorianCalendar();

      // print the time
      System.out.println("Date And Time Is: " + cal.getTime());

      // determine if the given calendar field has a value set
      System.out.println("Day of month is set: " + cal.isSet(Calendar.DAY_OF_MONTH));
      
      cal.clear(Calendar.DAY_OF_MONTH);
      
      // print the time
      System.out.println("Date And Time Is: " + cal.getTime());
	  
      // determine if the given calendar field has a value set
      System.out.println("Day of month is set: " + cal.isSet(Calendar.DAY_OF_MONTH));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Date And Time Is: Tue Sep 27 10:43:08 IST 2022
Day of month is set: true
Date And Time Is: Tue Sep 27 10:43:08 IST 2022
Day of month is set: false

Checking Day of Month if Set or Not in a Given Dated GregorianCalendar Instance Example

The following example shows the usage of Java Calendar isSet() method. We're creating an instance of a Calendar of a particular date using GregorianCalendar() method and printing the date and time using getTime() method and checking a field is set or not. As next step, we're clearing that field, again print the date and set flag.

package com.tutorialspoint;

import java.util.Calendar;
import java.util.GregorianCalendar;

public class CalendarDemo {
   public static void main(String[] args) {
   
      // create a calendar    
      Calendar cal = new GregorianCalendar(2025,8,26);

      // print the time
      System.out.println("Date And Time Is: " + cal.getTime());
	  
      // determine if the given calendar field has a value set
      System.out.println("Day of month is set: " + cal.isSet(Calendar.DAY_OF_MONTH));
      
      cal.clear(Calendar.DAY_OF_MONTH);
      
      // print the time
      System.out.println("Date And Time Is: " + cal.getTime());
	  
      // determine if the given calendar field has a value set
      System.out.println("Day of month is set: " + cal.isSet(Calendar.DAY_OF_MONTH));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Date And Time Is: Fri Sep 26 00:00:00 IST 2025
Day of month is set: true
Date And Time Is: Mon Sep 01 00:00:00 IST 2025
Day of month is set: false