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/JdtDeleteResourceAction.java
setDescription(ReorgMessages.getString("deleteAction.description")); 
	}
	/**
	 * The user has invoked this action
	 */
	public void run() {
		if (hasOnlyProjects()){
			deleteProjects();
			return;
		}	
		DeleteRefactoring refactoring= new DeleteRefactoring(getStructuredSelection().toList());
		
		fDeleteProjectContent= false;
		if (!confirmDelete())
			return;
		if (hasReadOnlyResources() && !isOkToDeleteReadOnly()) 
			return;
		refactoring.setDeleteProjectContents(fDeleteProjectContent);
		try{
			MultiStatus status= ReorgAction.perform(refactoring);
			if (!status.isOK()) {
				JavaUIException t= new JavaUIException(status);
				ExceptionHandler.handle(t, "Delete", "Unexpected exception. See log for details.");
			}
		} catch (JavaModelException e){
			ExceptionHandler.handle(e, "Delete", "Unexpected exception. See log for details.");
			return;
		}	
	}