import java.awt.dnd.*;
import java.awt.datatransfer.*;

DropTarget dt = new DropTarget(this, new DropTargetListener() {
 public void dragEnter(DropTargetDragEvent event) {
   // debug messages for diagnostics
   //System.out.println("dragEnter " + event);
   event.acceptDrag(DnDConstants.ACTION_COPY);
 }

 public void dragExit(DropTargetEvent event) {
   //System.out.println("dragExit " + event);
 }

 public void dragOver(DropTargetDragEvent event) {
   //System.out.println("dragOver " + event);
   event.acceptDrag(DnDConstants.ACTION_COPY);
 }

 public void dropActionChanged(DropTargetDragEvent event) {
   //System.out.println("dropActionChanged " + event);
 }

 public void drop(DropTargetDropEvent event) {
   //System.out.println("drop " + event);
   event.acceptDrop(DnDConstants.ACTION_COPY);

   Transferable transferable = event.getTransferable();
   DataFlavor flavors[] = transferable.getTransferDataFlavors();
   int successful = 0;

   for (int i = 0; i < flavors.length; i++) {
     try {
       Object stuff = transferable.getTransferData(flavors[i]);
       if (!(stuff instanceof java.util.List)) continue;
       java.util.List list = (java.util.List) stuff;

       for (int j = 0; j < list.size(); j++) {
         Object item = list.get(j);
         if (item instanceof File) {
           File file = (File) item;

         
           String filename = file.getPath();
           loadFile(filename);
         }
       }

     }
     catch (Exception e) {
       e.printStackTrace();
     }
   }
 }
}
);