The clear() method in Calendar class is used to set all the calendar field values and the time value of this Calendar undefined.
Note: Implementation of calendar class may use default field values for date and time calculations.
Syntax:
public final void clear()
Parameters: The method does not take any parameters.
Return Value: The method does not return any value.
Below programs illustrate the working of clear() Method of Calendar class:
Example:
// Java Code to illustrate clear() Method  import java.util.Calendar;  public class CalendarClassDemo {    public static void main(String args[])    {        // Creating a calendar object        Calendar calndr = Calendar.getInstance();          // Displaying the Current Date        System.out.println("Current Date&Time: "                           + calndr.getTime());          // Clear method for undefining the values        // of the calendar        calndr.clear();          // Displaying the final result        System.out.println("After clear method: "                           + calndr.getTime());    }} |
Output:
Current Date&Time: Tue Feb 12 13:01:42 UTC 2019 After clear method: Thu Jan 01 00:00:00 UTC 1970
Example 2:
// Java Code to illustrate clone() Method  import java.util.*;  public class CalendarClassDemo {    public static void main(String args[])    {        // Creating a calendar object        Calendar calndr1 = new GregorianCalendar(2018, 12, 2);          // Displaying current calendar        System.out.println("Original calendar: "                           + calndr1.getTime());          // Clear method for undefining the values        // of the calendar        calndr1.clear();          // Displaying the final result        System.out.println("After clear method: "                           + calndr1.getTime());    }} |
Output:
Original calendar: Wed Jan 02 00:00:00 UTC 2019 After clear method: Thu Jan 01 00:00:00 UTC 1970
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html#clear()
