Are there Java libraries to do drag and drop

Question

Are there open source libraries for Java to make implementation of drag and drop easier?

I plan to make something like the one shown below:

The program is Alice, where you can drag some elements on the left and nest them to the right. It's open source, but they did not use any libraries I think. I'm wondering if we anyone know of open source frameworks that work this way, or assist in doing complex drag and drops.

Answer 1

If you use Swing I recommend working with the AWT internal drag and drop system.

As Sun mentions on their guides:

We do not recommend that you create your own drag and drop support using the AWT classes. This implementation would require significant complex support internal to each component.
[source]

For a deeper look at swing dnd you should try the Drag and Drop-Guide.

If you decide to use a different toolkit than Swing you could be successfull finding any good third party drag and drop libraries.

Answer 2

You don't need third party libraries. All is provided in Java default libraries:

May this can help you:

Drag and drop of complex custom objects