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Java Calendar computeFields() Method with Example

Calendar Class computeFields() method: Here, we are going to learn about the computeFields() method of Calendar Class with its syntax and example.
Submitted by Preeti Jain, on January 26, 2020

Calendar Class computeFields() method

• computeFields() method is available in java.util package.
• computeFields() method is used to convert current ms(milliseconds) time value time to calendar field values in fields.
• computeFields() method is a non-static method, it is accessible with the class object and if we try to access these methods with the class name then we will get an error.
• computeFields() method does not throw an exception at the time of computing Calendar fields.

Syntax:

    protected void computeFields();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is void, it returns nothing.

Example:

// Java Program to demonstrate the example of
// void computeFields() method of Calendar

import java.util.*;

public class ComputeFieldOfCalendar extends GregorianCalendar {
    public static void main(String[] args) {
        // Instantiating a Calendar object
        ComputeFieldOfCalendar ca = new ComputeFieldOfCalendar();

        // Display current calendar
        System.out.println("ca: " + ca.getTime());

        // By using clear(int fi) method to set the field unset
        ca.clear(GregorianCalendar.MONTH);

        // Display calendar
        System.out.println("ca.clear(GregorianCalendar.MONTH): " + ca.getTime());

        // By using set() method is to set a month 
        // and invoke computeFields()
        ca.set(GregorianCalendar.MONTH, 6);
        ca.computeFields();

        // Display calendar
        System.out.println("ca.set(GregorianCalendar.MONTH,6): " + ca.getTime());
    }
}

Output

ca: Fri Jan 24 12:24:23 GMT 2020
ca.clear(GregorianCalendar.MONTH): Fri Jan 24 12:24:23 GMT 2020
ca.set(GregorianCalendar.MONTH,6): Fri Jan 24 12:24:23 GMT 2020