JAVA2D技术下载

The classes for the Java2D demo are contained in the Java2Demo.jar file. To run the Java2D demo : % java -jar Java2Demo.jar - or - % appletviewer Java2Demo.html Although it's not necessary to unpack the Java2Demo.jar file to run the demo, you may want to extract its contents if you plan to modify any of the demo source code. To extract the contents of Java2Demo.jar, run this command from the Java2D directory : jar xvf Java2Demo.jar ----------------------------------------------------------------------- Introduction ----------------------------------------------------------------------- This Java2D demo consists of a set of demos housed in one GUI framework that uses a JTabbedPane. You can access different groups of demos by clicking the tabs at the top of the pane. There are demo groups for Arcs_Curves, Clipping, Colors, Composite, Fonts, Images, Lines, Mix, Paint, Paths and Transforms. On the right-hand side of the pane, the GUI framework features individual and global controls for changing graphics attributes. There's also a memory-usage monitor, and a monitor for tracking the performance, in frames per second, of animation demos. ----------------------------------------------------------------------- Tips on usage ----------------------------------------------------------------------- Click on one of the tabs at the top of the pane to select a demo group. When you select a group, a set of surfaces is displayed, each of which contains one of the group's demos. At the bottom of each surface is a set of tools for controlling the demo. The tools can be displayed by selecting the Tools checkbox in the Global Controls panel or by clicking on the slim strip of gray bumps at the bottom of the demo panel. If you click on a demo surface, that demo is laid out by itself. A new icon button will appear in the demo's tools toolbar one that enables you to create new instances of that demo's surface. To run the demo continuously without user interaction, select the Run Window item in the Options menu and press the run button in the new window that's displayed. To do this from the command line : java -jar Java2Demo.jar -runs=10 To view all the command line options for customizing demo runs : java -jar Java2Demo.jar -help Parameters that can be used in the Java2Demo.html file inside the applet tag to customize demo runs : <param name="runs" value="10"> <param name="delay" value="10"> <param name="ccthread" value=" "> <param name="screen" value="5"> <param name="antialias" value="true"> <param name="rendering" value="true"> <param name="texture" value="true"> <param name="composite" value="true"> <param name="verbose" value=" "> <param name="buffers" value="3,10"> <param name="verbose" value=" "> <param name="zoom" value=" "> You can run the demos in stand-alone mode by issuing a command like this from the Java2D directory: java -cp Java2Demo.jar demos.Clipping.ClipAnim You can run the demos in groups by issuing a command like this from the Java2D directory: java -cp Java2Demo.jar DemoGroup Clipping To recompile a demo, first extract the contents of the Java2Demo.jar file, then issue this command from the Java2D directory: For win32 : javac src\demos\Clipping\ClipAnim.java -d . For solaris : javac src/demos/Clipping/ClipAnim.java -d . To increase or decrease the Memory Monitor sampling rate click on the Memory Monitor's title border, a panel with a TextField will appear. The Java2Demo Intro (the 'Java2D' tab) contains a scene table, click in the gray border and a table will appear. Animated demos have a slider to control the animation rate. Bring up the animated demo toolbar, then click in the gray area of the toolbar panel, the toolbar goes away and the slider appears. Demos that have Custom Controls can have their Custom Control Thread activated and stopped by clicking in the gray area of the demos Custom Control panel. For less garbage collection and smoother animation for the Intro and other animated demos run with command line argument : java -jar -ms48m Java2Demo.jar ----------------------------------------------------------------------- NOTE about demo surfaces ----------------------------------------------------------------------- The demo groups are in separate packages with their class files stored in directories named according to the demo group name. All drawing demos extend the DemoSurface abstract class and implement the DemoSurface's drawDemo method. All animated demos implement the AnimatingContext interface. You can change a demo into a Canvas instead of a DemoSurface by making it extend Canvas rather than DemoSurface. You'll also need to change drawDemo(int w, int h, Graphics2D g2) to paint(Graphics g), and declare and intialize g2. For those demos that animate, the run(), start() and stop() methods will be needed to handle the thread, and you should create and draw into an off screen image for double buffering. As an example, the conversion for Curves.java (non-animated) would be: public class Curves extends DemoSurface { public void drawDemo(int w, int h, Graphics2D g2) { ... } } Becomes : public class Curves extends Canvas { public void paint(Graphics g) { Graphics2D g2 = (Graphics2D) g; Dimension d = getSize(); ... } } Most of the Java2Demo demos can be found as stand-alone Samples : http://java.sun.com/products/java-media/2D/samples/index.html ====================================================================== For a Java2D API Guide & Tutorial : http://java.sun.com/products/jdk/1.2/docs/guide/2d/spec/j2d-bookTOC.doc.html http://java.sun.com/docs/books/tutorial/2d/index.html For the latest version of the Java2D demo : http://java.sun.com/products/java-media/2D/index.html You may send comments via the java2d-comments@sun.com alias, which is a one-way alias to Sun's Java 2D API developers, or via the java2d-interest@sun.com alias, which is a public discussion list.