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Convert Date To Calendar


In this example we are converting  date into Calendar. Here we are using format method to convert date into string. 

We are using java.util. Calendar class in this example. The GregorianCalendar class is subclass of the Calendar class. Calendar is an abstract base class for converting between a Date object and a set of integer fields such as YEAR, MONTH, DAY, HOUR, and so on. A Date object represents a specific instant of time with millisecond precision The subclasses of Calendar class  interpret a Date according to the rules of a specific calendar system. Calendar class  provides a class method getInstance to get a generally useful object of this type. Calendar's getInstance method returns a Calendar object whose time fields have been initialized with the current date and time. e.g
Calendar rightNow = Calendar.getInstance();

A Calendar object can produce all the time field values needed to implement the date-time format for a particular language and calendar style.

The method used:
This method is define as public, static and final in Calendar class The return type of this method is DateFormat. This method is used  to get a default date/time formatter that uses the SHORT style for both date and time.

setTime(long time):
This method is used to set the date object to represent a time in milliseconds after January 1, 1970 00:00:00 GMT. 

In this example we are going to get date instance from system then parse and convert it into a Calendar set formatted date in a Calendar object.

The code of the program is given below:

import java.util.*;
import java.text.*;
public class DateToCalender {
public static void main(String[] args) {
 try {    String str_date="11-June-07";
          DateFormat formatter ; 
      Date date ; 
          formatter = new SimpleDateFormat("dd-MMM-yy");
              date = (Date)formatter.parse(str_date); 
         Calendar cal=Calendar.getInstance();
             System.out.println("Today is " +cal );
  catch (ParseException e)
    {System.out.println("Exception :"+e);    }    

The output of the program is given below:

C:\date>javac DateToCalender.java
C:\date>java DateToCalender
Today is java.util.GregorianCalendar[time=1181500200000,areFieldsSet=true,areAll

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