Tài liệu Introduction to Java: 1-Abstract Window Toolkit Overview doc

... BSD-based UNIX to System V Release 4–based UNIX , from OpenWindows to Motif, from PC to UNIX to Macintosh (or some combination thereof), and between various other alternatives, too numerous to mention. ... chapter. 1.1.3.2 The Button class A button is little more than a label that you can click on. Selecting a button trig- gers an event telling the program to go to work. Section...

Ngày tải lên: 14/12/2013, 12:15

... provides a Toolkit for Windows NT/95 (sun.awt.win32.MToolkit [Java1.0] or sun.awt.windows.MToolkit [Java1.1]), Solaris/Motif (sun.awt.motif.MToolkit), and Macintosh (sun.awt.macos.MToolkit). Although the Toolkit ... system property awt .toolkit. Since this is a static method, you don’t need to have a Toolkit object to call it; just call Toolkit. getDefaultToolkit(). Currently, only...

Ngày tải lên: 21/01/2014, 06:20

... deliver any data to the ultimate consumer. To use an ImageFilter, you pass it to the FilteredImageSource constructor, which ser ves as an ImageProducer to pass the new pixels to their consumer. ... may use internal buffers to store an intermediate copy of the image so the filter can use adjacent pixel values to smooth or blend pixels together. These filters may need to load the...

Ngày tải lên: 21/01/2014, 06:20

... AWTError if it is executed with this command: java -Dawt .toolkit= foo throwme The error occurs because the Java interpreter tries to use the toolkit foo, which does not exist (assuming that class ... your CLASSPATH). There- fore, getDefaultToolkit() throws an AWTError, and the next statement never exe- cutes. Example 13–1: The throwme class import java.awt .Toolkit; public class throwme...

Ngày tải lên: 21/01/2014, 06:20

... don’t stop an audio clip, the user will have to exit the browser to get the sound to stop playing. Applets can play audio clips simultaneously. Based upon the user’s actions, you may want to play ... a Vector of AudioStreams) as its sole parameter. The construc- tor converts the sequence of audio streams into a single stream to be played in order. An example follows: Vector v = new...

Ngày tải lên: 21/01/2014, 06:20

... system clipboard by ask- ing the Toolkit for it: Toolkit. getDefaultToolkit().getSystemClipboard() When working with the system clipboard, native applications have access to infor- mation created within ... method, which is called in response to a button click. We check which button the user clicked; if the user clicked the Copy button, we read the text field tf and use it to create a...

Ngày tải lên: 21/01/2014, 06:20

... hidden behind classes pro- vided with the toolkit for your platform. On Windows NT/95 platforms, these classes are sun.awt.windows.WPrintGraphics and sun.awt.windows.WPrintJob. Other platforms have ... PRINTING PrintJob pjob = getToolkit().getPrintJob(aFrame, "Job Title", (Properties)null); The Frame is used to hold a print dialog box, asking the user to confirm or cancel the p...

Ngày tải lên: 21/01/2014, 06:20

... example, the Button class contains seven public methods, none of which happens to be setFont(). The font used to display a button’s label is certainly settable—but to find it, you have to look in the ... this chapter: • Introduction to the Reference Chapters • Package diagrams Introduction to the Reference Chapters The preceding seventeen chapters cover just about all there is...

Ngày tải lên: 21/01/2014, 06:20

... e); public void windowActivated(WindowEvent e); public void windowClosed(WindowEvent e); public void windowClosing(WindowEvent e); public void windowDeactivated(WindowEvent e); public void windowDeiconified(WindowEvent ... and b. windowDeactivated public void windowDeactivated (WindowEvent e) Parameters e The window event that occurred. Description Handles the event by passing it on to li...

Ngày tải lên: 21/01/2014, 06:20

... Clipboard class is a repository for a Transferable object and can be used for cut, copy, and paste operations. The system clipboard can be accessed by call- ing Toolkit. getDefaultToolkit().getSystemClipboard(). ... could place a string on the system’s clipboard with the following code: Clipboard c = Toolkit. getDefaultToolkit().getSystemClipboard(); StringSelection s = new StringSelection(...

Ngày tải lên: 21/01/2014, 06:20