Jtree Java6 Netbeans6 Drag and Drop code

I need to use Jtree that supports drag and drop, from each nodes. this should be really simple for someone that has used Jtrees before. this is to be developed in NetBeans 6 with java 6 . I need it urgently, willing to pay $30. all I need to is for this component to be loaded with some custom nodes and to support drag and drop between the nodes, follow rules like the node can't be dragged to itself, to its parents or to its children. nor can it be dropped on leafs. THE MODEL MUST UPDATE ACCORDINGLY. set up the events so that it prints the change when there is a drag and drop.