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A Drag and Drop Example by Sheetal Gupta

About the example

This simple example contains two lists from which a user can drag and drop items from one list to another. It illustrates the concept that a Component can act as a "Drop Target" and as a "Drag Source." Here's a snapshot of this example:

The example uses JList, but any other Component could easily replace JList. All you would have to do is revise implementations of the DNDComponentInterface methods.

About the files

• DNDList.java: the specialized JList which can behave as a DropTarget and as a DragSource.
• DNDComponentInterface.java: the interface that all components must implement to add/remove elements to itself and to detect when a drop/drag occurs.
• TestDND.java: the tester for this class.

Running this example

To run this example, do the following using JDK 1.2:

1. javac DNDList.java
2. javac DNDComponentInterface.java
3. javac TestDND.java
4. java TestDND

About the Author

Sheetal Gupta is a Senior Consultant with Ernst and Young's Java Service Line, based in New York.

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