3. Essential Java Classes 3. Date and Time

Date and Time Classes

Date - represents a specific instant in time,

Class Date

represents a specific instant in time, with millisecond precision
new Date()

Some Date methods

equals(Object obj) - compares dates
after(Date date) - compares dates
before(Date

Class Calendar

Abstract class that provides methods for converting between a specific

Calendar Methods

Calendar rightNow = Calendar.getInstance(); - gets current date and time
set(int

Class GregorianCalendar

Concrete subclass of Calendar
Provides the standard calendar system used

Calendar Examples

Задание даты:
GregorianCalendar calendar = new GregorianCalendar(2012, Calendar.May, 14);
Добавление к дате

Date & Calendar Transformations

Calendar c = Calendar.getInstance();
Date dt = new Date();
Calendar

Class SimpleDateFormat

is a concrete class for formatting and parsing dates in

SimpleDateFormat Example

SimpleDateFormat dtFrm =
new SimpleDateFormat("dd.MM.yyyy");
Date start = new Date();
String

Class Locale

represents a specific geographical, political, or cultural region
Locale lc =

Класс SimpleTimeZone

A concrete subclass of TimeZone class that represents a time

SimpleDateFormat Localization

SimpleDateFormat dtFrmL = new
SimpleDateFormat("dd.MMMM.yyyy", Locale.ENGLISH);
Date dt = new

DateFormat Localization

DateFormat dtFrmD = DateFormat.getDateInstance(DateFormat.DEFAULT, Locale.ENGLISH);
System.out.println("Locale.ENGLISH: " + dtFrmD.format(dt));
Locale.ENGLISH: Oct 5,

Date Localization

http://docs.oracle.com/javase/tutorial/i18n/format/dateFormat.html

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Exercise 3.3.1

Print the following:
Current date
Date in 6 weeks
Date 4 month

Exercise 3.3.1

See 331DateActions project for the full text

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Exercise 3.3.2.

Create a static method that gets some date and

Exercise 3.3.2.

See 332NextBankDay project for full text

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