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/ReorgDestinationAction.java
public DestinationRenderer(int flags) {
			super(flags);
		}
	
		public String getText(Object element) {
			try {
				if (element instanceof IPackageFragmentRoot) {
					IPackageFragmentRoot root= (IPackageFragmentRoot)element;
					if (root.getUnderlyingResource() instanceof IProject)
						return ReorgMessages.getString("DestinationRenderer.packages"); 
				}
			} catch (JavaModelException e) {
				ExceptionHandler.handle(e, "Exception", "Unexpected exception occurred. See log for details.");
			}
			return super.getText(element);
		}
	}
	
	private static class ReorgSelectionValidator implements ISelectionValidator {