Java Foundation Classes in a Nutshell: A Desktop Quick by David Flanagan

By David Flanagan

Java beginning periods in a Nutshell is an quintessential fast reference for Java programmers who're writing functions that use images or graphical consumer interfaces. the writer of the bestsellingJava in a Nutshell has written fast moving introductions to the Java APIs that contain the Java starting place sessions (JFC), equivalent to the Swing GUI elements and Java 2nd, for you to commence utilizing those intriguing new applied sciences correct away.This e-book additionally comprises O'Reilly's classic-style, quick-reference fabric for all the periods within the javax.swing and java.awt programs and their a number of subpackages. This reference fabric covers the entire new JFC periods within the Java 2 platform, in addition to the prevailing Java 1.1 AWT periods. as soon as you could have discovered concerning the JFC, you will continue this ebook subsequent for your keyboard for convenient reference whereas you program.Java beginning sessions in a Nutshell includes the following:

  • An evaluate of the structure of graphical consumer interfaces outfitted with either the hot Swing API and the older AWT
  • An creation to the $64000 parts and alertness prone supplied through the Swing API
  • An complete clarification of the good points of the hot Java 2nd photos API
  • A entire speedy reference for the images- and GUI-related periods within the Java 2 platform

This ebook is a part of the two-volume set of fast references that each Java programmer wishes. it's an important spouse to Java in a Nutshell, third Edition, which covers the main nongraphical APIs in Java 1.2. a 3rd quantity, Java company in a Nutshell, makes a speciality of the Java firm APIs and is of curiosity to programmers engaged on server-side or company Java applications.

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These effects provide feedback to the user that the drop target Component is interested in receiving the drop. dragExit() Called when a previously accepted drag leaves the DropTarget. If the dragEnter() method performed any custom drag under effects, this method should undo them. dragOver() Invoked continuously while the mouse pointer remains over the DragTarget. In most cases, this method need not do anything. If the DropTarget is a complex one that is capable of accepting drags in some regions but not in other regions, this method should behave like dragEnter() and call the acceptDrag() or rejectDrag() methods of the event object to inform the system whether a drag is possible at the current location.

Create a DropTarget by specifying the Component with which it is to be associated and the DropTargetListener that responds to interesting events during a drag-and-drop operation. You may optionally specify a bit mask of drop actions that this DropTarget can support and a boolean value that indicates whether the DropTarget is currently active. If you do not specify these optional values, your DropTarget supports ACTION_COPY_OR_MOVE and is active. Once you have created a DropTarget, you often never have to do anything else with it.

For example, if the action is ACTION_MOVE, the DragSourceListener deletes its copy of the data once it receives notification that the DropTargetListener has successfully copied it. Transferable getTransferable (); // Public Instance Methods 50 Chapter 12. dnd Package Chapter 12. 2 serializable event This class is the superclass of both DropTargetDragEvent and DropTargetDropEvent. getDropTargetContext() returns the DropTargetContext object that generated the event, and getSource() returns the corresponding DropTarget object.

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