I'm working on a program where I want to show a bunch of categories and sub-categories using one of those menu trees. I'm using NetBeans to do most of the GUI grunt work, and I used it to add a JTree ...

Over the ages, drag and drop with the Swing component set has changed considerably. Early versions had a basic API in the java.awt.dnd package (with support from java.awt.datatransfer), but you had to ...