public final boolean isSet(int calndr_field)

// Java code to illustrate
// isSet() method
   
import java.util.*;
public class CalendarDemo {
    public static void main(String args[])
    {
   
        // Creating a calendar object
        Calendar calndr = Calendar.getInstance();
   
        // Displaying the calendar object
        System.out.println("The Year is: "
                           + calndr.get(Calendar.YEAR));
   
        // Querying for the value if set or not
        boolean val = calndr.isSet(Calendar.YEAR);
        System.out.println("Is the"
                           + " Value set? " + val);
   
        // Clearing the instance
        calndr.clear(Calendar.YEAR);
   
        // Performing isSet() operation
        val = calndr.isSet(Calendar.YEAR);
        System.out.println("Is the"
                           + " Value set? " + val);
    }
}

The Year is: 2019
Is the Value set? true
Is the Value set? false

// Java code to illustrate
// isSet() method
   
import java.util.*;
public class CalendarDemo {
    public static void main(String args[])
    {
   
        // Creating a calendar object
        Calendar calndr = Calendar.getInstance();
   
        // Displaying the calendar object
        System.out.println("Todays Day is: "
                           + calndr.get(
                                 Calendar.DAY_OF_MONTH));
   
        // Querying for the value if set or not
        boolean val
            = calndr.isSet(Calendar.DAY_OF_MONTH);
        System.out.println("Is the"
                           + " Value set? " + val);
   
        // Clearing the instance
        calndr.clear(Calendar.DAY_OF_MONTH);
   
        // Performing isSet() operation
        val = calndr.isSet(Calendar.DAY_OF_MONTH);
        System.out.println("Is the"
                           + " Value set? " + val);
    }
}

Todays Day is: 21
Is the Value set? true
Is the Value set? false