Date Calendar Examples Lecture

DateCalendarExamples.java

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
/*
    Date starts from 1900
    Unix epoch:  Time starts from 1970-1-1
 */
public class DateCalendarExamples{
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat simpleDateFormat =
            new SimpleDateFormat("dd/MM/yyyy");
        Date today = new Date();
        System.out.println(simpleDateFormat.format(today));

        System.out.println(today.getDate());
        System.out.println(today.getYear());
        System.out.println(today.getDay());
        System.out.println(today.getMonth());
        System.out.println(today.getTime());

        Date date = simpleDateFormat.parse("29/12/1979");
        System.out.println(date);

        //-------------------------------------------

        System.out.println(new Date());
        Calendar calendar = new GregorianCalendar();

        System.out.println(calendar.get(Calendar.ERA));

        System.out.println(calendar.get(Calendar.YEAR));
        System.out.println(calendar.get(Calendar.MONTH)); // index
        System.out.println(calendar.get(Calendar.WEEK_OF_YEAR));

        System.out.println(calendar.get(Calendar.DATE));
        System.out.println(calendar.get(Calendar.DAY_OF_MONTH));
        System.out.println(calendar.get(Calendar.DAY_OF_YEAR));
        System.out.println(calendar.get(Calendar.DAY_OF_WEEK)); // not index

        System.out.println(calendar.get(Calendar.HOUR));
        System.out.println(calendar.get(Calendar.HOUR_OF_DAY));
        System.out.println(calendar.get(Calendar.MINUTE));
        System.out.println(calendar.get(Calendar.SECOND));
        System.out.println(calendar.get(Calendar.MILLISECOND));
        System.out.println(calendar.get(Calendar.AM_PM)); // 0: AM, 1: PM
    }
}