Java Swing Введение
Материал из Wiki.crossplatform.ru
This is an introductory Swing tutorial. The purpose of this tutorial is to get you started with the Java Swing toolkit. The tutorial has been created and tested on Linux.
О Swing
Swing library is an official Java GUI toolkit released by Sun Microsystems.
The main characteristics of the Swing toolkit
- platform independent
- customizable
- extensible
- configurable
- lightweight
Swing consists of the following packages
- javax.swing
- javax.swing.border
- javax.swing.colorchooser
- javax.swing.event
- javax.swing.filechooser
- javax.swing.plaf
- javax.swing.plaf.basic
- javax.swing.plaf.metal
- javax.swing.plaf.multi
- javax.swing.plaf.synth
- javax.swing.table
- javax.swing.text
- javax.swing.text.html
- javax.swing.text.html.parser
- javax.swing.text.rtf
- javax.swing.tree
- javax.swing.undo
Swing is probably the most advanced toolkit on this planet. It has a rich set of widgets. From basic widgets like Buttons, Labels, Scrollbars to advanced widgets like Trees and Tables.
Swing is written in 100% java.
Swing is a part of JFC, Java Foundation Classes. It is a collection of packages for creating full featured desktop applications. JFC consists of AWT, Swing, Accessibility, Java 2D, and Drag and Drop. Swing was released in 1997 with JDK 1.2. It is a mature toolkit.
The Java platform has Java2D library, which enables developers to create advanced 2D graphics and imaging.
There are basically two types of widget toolkits.
- Lightweight
- Heavyweight
A heavyweight toolkit uses OS's API to draw the widgets. For example Borland's VCL is a heavyweight toolkit. It depends on WIN32 API, the built in Windows application programming interface. On Unix systems, we have GTK+ toolkit, which is built on top of X11 library. Swing is a lightweight toolkit. It paints it's own widgets. It is in fact the only lightweight toolkit I know about.
SWT библиотека
There is also another GUI library for the Java programming language. It is called SWT. The Standard widget toolkit. The SWT library was initially developed by the IBM corporation. Now it is an open source project, supported by IBM. The SWT is an example of a heavyweight toolkit. It lets the underlying OS to create GUI. SWT uses the java native interface to do the job. The main advantages of the SWT are speed and native look and feel. The SWT is on the other hand more error prone. It is less powerful then Swing. It is also quite Windows centric library.
