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 ...

Adding drag-and-drop support to JTrees has been covered already in Java Tip 97: Add Drag and Drop to Your JTrees. I encourage you to read that tip first to get a good understanding of the ...