Java package: Difference between revisions

Revision as of 16:54, 5 January 2006

Revision as of 18:00, 5 January 2006

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Related [[Datatype|types]] in Java are placed in a common package.

{{cleanup-date|December 2005}}

*A package provides a unique [[namespace|namespace]] for the types it contains.

Packages are collections of classes and interfaces in Java. Each package is a simply a folder created by programmer.

*A package facilitates access protection.

Ther are basically two types of packages in Java:

*A package can contain the following kinds of [[Datatypes|types]].

**[[Class (computer science)|Classes]]

**[[interface (computer science)|Interfaces]]

**Enumerated Types

**Annotations

A package is represented in Java code by a series of textual names delimited by the '.' (dot) character.

e.g

import java.awt.event.*;

And is stored on disk {or in a compressed file such as a [[Jar (file format)|jar]] or Ear (Enterprise Archive)}

as a series of nested directories.

e.g.

/java/awt/event

# User Defined packages

# API Packages or Inbuild packages

'''User''' defined packages are the packages where programmer can crate it it base / super classes. [[By importing]] these packages programmer can develop new classes by inheriting attributes and behaviours of these classes.

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