Calendar computeFields() method in Java with Examples
The computeFields() method in Calendar class is used for the conversion operation of the current millisecond time value time to calendar field values mentioned in the fields[].
Note: This allows syncing up the new time that is set for the calendar object with the calendar field values.
Syntax:
protected abstract void computeFields()
Parameters: The method does not take any parameters.
Return Value: The method does not return any value.
Below programs illustrate the working of computeFields() Method of Calendar class:
Example 1:
// Java Code to illustrate// computeFields() Method  import java.util.*;  public class CalendarClassDemo    extends GregorianCalendar {    public static void main(String args[])    {        // Creating calendar object        CalendarClassDemo calndr = new CalendarClassDemo();          // Displaying the current date        System.out.println("The Current "                           + "date is: " + calndr.getTime());          // Clearing the calendar        calndr.clear();          // Set a new year and call        // computeFields()        calndr.set(GregorianCalendar.YEAR, 2016);        calndr.computeFields();          // Displaying the current date        System.out.println("The recent"                           + " date is: " + calndr.getTime());    }} |
Output:
The Current date is: Wed Feb 13 16:15:15 UTC 2019 The recent date is: Wed Feb 13 16:15:15 UTC 2019
Example 2:
// Java Code to illustrate// computeFields() Method  import java.util.*;  public class CalendarClassDemo    extends GregorianCalendar {    public static void main(String args[])    {        // Creating calendar object        CalendarClassDemo calndr = new CalendarClassDemo();          // Displaying the current date        System.out.println("The Current "                           + "date is: " + calndr.getTime());          // Clearing the calendar        calndr.clear();          // Set a new year and call        // computeFields()        calndr.set(GregorianCalendar.YEAR, 2000);        calndr.computeFields();          // Displaying the current date        System.out.println("The recent"                           + " date is: " + calndr.getTime());    }} |
Output:
The Current date is: Wed Feb 13 16:15:18 UTC 2019 The recent date is: Wed Feb 13 16:15:18 UTC 2019
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html#computeFields()
