Drag and Drop woes driving me up a creek!

Question

Hello:
I went the the following link and downloaded the many samples for DnD.
http://www.rockhoppertech.com/dndsrc-beta-1.0.jar
My problem is that I do not know how to run any of the samples.
Can someone please, please, please tell me how to run even one
of the examples with step-by-step instructions? I have already
tried putting the jar and the entire directory path in my
classpath statement, and I am bombarded with import errors.
Thanks!

Answer 1

Can someone please help? Attached is a piece of code I am trying to modify so that I can drag and drop objects. However, the compiler gives me an error for the container.add(obj) line. Any suggestions/solutions? Thanks so much!
import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import java.io.*;
import javax.swing.*;
public class ObjTransfer extends TransferHandler
implements Transferable {
private static final DataFlavor flavors[] = {null};
static {       
try { flavors[0] = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType); }
catch (Exception ex) { ex.printStackTrace(); }
private Object obj;
public int getSourceActions(JComponent c) { return TransferHandler.COPY;  }
public boolean canImport(JComponent comp, DataFlavor flavor[]) {
if (!(comp instanceof Object)) {
return false;
for (int i=0, n=flavor.length; i<n; i++) {
if (flavor.equals(flavors[0])) {
return true;
return false;
public Transferable createTransferable(JComponent comp) {
obj = null;
obj = (Object)comp;
return this;
public boolean importData(JComponent comp, Transferable t) {
try {
if (t.isDataFlavorSupported(flavors[0])) {
obj = (Object)t.getTransferData(flavors[0]);
if (comp instanceof Object) {
Container container = (Container)comp;
container.add(obj);
return true;
} catch (UnsupportedFlavorException ignored) { }
catch (IOException ignored) {}
return false;
//Transferable
public Object getTransferData(DataFlavor flavor) {
if (isDataFlavorSupported(flavor)) {  return obj;   }
else return null;
public DataFlavor[] getTransferDataFlavors() {  return flavors;  }
public boolean isDataFlavorSupported(DataFlavor flavor) {
return flavor.equals(flavors[0]);
} // end of ObjTransfer class