On JDK1.2.2, using StringSelection for transferable string in drag-n-drop cause the java.lang.IllegalArgumentException. Here is the dump:
java.lang.IllegalArgumentException: no representation class specified
for:text/plain; charset=iso8859-1
        at java.awt.datatransfer.DataFlavor.initialize(DataFlavor.java, Compiled
Code)
        at java.awt.datatransfer.DataFlavor.<init>(DataFlavor.java, Compiled
Code)
        at java.awt.datatransfer.SystemFlavorMap.<init>(SystemFlavorMap.java,
Compiled Code)
        at
java.awt.datatransfer.SystemFlavorMap.getDefaultFlavorMap(SystemFlavorMap.java,
Compiled Code)
        at java.awt.dnd.DragSource.<clinit>(DragSource.java:83)
        at DnDTextTest.<init>(DnDTextTest.java, Compiled Code)
        at DnDTextTest.main(DnDTextTest.java, Compiled Code)

This is a regression bug in JDK1.2.2 (works fine in JDK1.2). The test in
/home/tinasu/ws/Drag-n-Drop/SmallTests/SwingButtons demonstrates the problem.