Arrastar componentes no JList

import java.awt.BorderLayout; 
import java.awt.datatransfer.StringSelection; 
import java.awt.dnd.DnDConstants; 
import java.awt.dnd.DragGestureEvent; 
import java.awt.dnd.DragGestureListener; 
import java.awt.dnd.DragGestureRecognizer; 
import java.awt.dnd.DragSource; 
import java.awt.dnd.DragSourceDragEvent; 
import java.awt.dnd.DragSourceDropEvent; 
import java.awt.dnd.DragSourceEvent; 
import java.awt.dnd.DragSourceListener; 
import java.awt.event.WindowAdapter; 
import java.awt.event.WindowEvent; 

import javax.swing.JFrame; 
import javax.swing.JList; 
import javax.swing.JScrollPane; 
import javax.swing.ListSelectionModel; 

public class DragTest extends JFrame implements DragSourceListener, 
    DragGestureListener { 

  DragSource ds; 

  JList jl; 

  StringSelection transferable; 

  String[] items = { "Java", "C", "C++", "Lisp", "Perl", "Python" }; 

  public DragTest() { 
    super("Drag Test"); 
    setSize(200, 150); 
    addWindowListener(new WindowAdapter() { 
      public void windowClosing(WindowEvent we) { 
        System.exit(0); 
      } 
    }); 
    jl = new JList(items); 
    jl.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 
    getContentPane().add(new JScrollPane(jl), BorderLayout.CENTER); 

    ds = new DragSource(); 
    DragGestureRecognizer dgr = ds.createDefaultDragGestureRecognizer(jl, 
        DnDConstants.ACTION_COPY, this); 
    setVisible(true); 
  } 

  public void dragGestureRecognized(DragGestureEvent dge) { 
    System.out.println("Drag Gesture Recognized!"); 
    transferable = new StringSelection(jl.getSelectedValue().toString()); 
    ds.startDrag(dge, DragSource.DefaultCopyDrop, transferable, this); 
  } 

  public void dragEnter(DragSourceDragEvent dsde) { 
    System.out.println("Drag Enter"); 
  } 

  public void dragExit(DragSourceEvent dse) { 
    System.out.println("Drag Exit"); 
  } 

  public void dragOver(DragSourceDragEvent dsde) { 
    System.out.println("Drag Over"); 
  } 

  public void dragDropEnd(DragSourceDropEvent dsde) { 
    System.out.print("Drag Drop End: "); 
    if (dsde.getDropSuccess()) { 
      System.out.println("Succeeded"); 
    } else { 
      System.out.println("Failed"); 
    } 
  } 

  public void dropActionChanged(DragSourceDragEvent dsde) { 
    System.out.println("Drop Action Changed"); 
  } 

  public static void main(String args[]) { 
    new DragTest(); 
  } 
}