Bug 7914 Cannot copy a Java project in the packages view
There is no way to copy a Java project in the packages view. You can copy a project in the Navigator. This is a functional gap.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/reorg/MoveAction.java
String[] labels= new String[] {IDialogConstants.YES_LABEL, IDialogConstants.YES_TO_ALL_LABEL,
															 IDialogConstants.NO_LABEL,  IDialogConstants.CANCEL_LABEL };
		final MessageDialog dialog = new MessageDialog(shell,	title, null, question, MessageDialog.QUESTION,	labels,  0);
		shell.getDisplay().syncExec(new Runnable() {
			public void run() {
				dialog.open();
			}
		});
		int result = dialog.getReturnCode();
		if (result == 0)
			return IDialogConstants.YES_ID;
		if (result == 1)
			return IDialogConstants.YES_TO_ALL_ID;
		if (result == 2)
			return IDialogConstants.NO_ID;
		return IDialogConstants.CANCEL_ID;
	}
	
	
	protected void setShowPreview(boolean showPreview) {
		fShowPreview = showPreview;
	}
	
	private static boolean isOkToMoveReadOnly(ReorgRefactoring refactoring){
		if (! hasReadOnlyElements(refactoring))
			return true;
		
		return  MessageDialog.openQuestion(
				JavaPlugin.getActiveWorkbenchShell(),
				ReorgMessages.getString("moveAction.checkMove"),