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
return ReorgAction.canActivate(new DeleteRefactoring(selection.toList()));
	}
	
	private boolean confirmDelete() {
		Assert.isTrue(getProjects().isEmpty());
		String title= ReorgMessages.getString("deleteAction.confirm.title"); 
		String label= ReorgMessages.getString("deleteAction.confirm.message"); 
		Shell parent= JavaPlugin.getActiveWorkbenchShell();
		return MessageDialog.openConfirm(parent, title, label);
	}
	
	private List getProjects() {
		List result= new ArrayList(getStructuredSelection().size());
		for(Iterator iter= getStructuredSelection().iterator(); iter.hasNext(); ) {
			Object element= iter.next();
			if (element instanceof IJavaProject) {
				try {
					result.add(((IJavaProject)element).getUnderlyingResource());
				} catch (JavaModelException e) {
					if (!e.isDoesNotExist()) {
						
						JavaPlugin.log(e);
					}
				}
			}
		}
		return result;
	}	
}