The object java should be attached to the bottom node. So is this error present in the formal context?
Hang on this isn't a bug. Java doesn't imply javax or org. The diagram is ok.
But what in Java is dependent on JComponent?
Here is an elaboration of the diagram.
It seems that awt.component makes a call to swing.JComponent. Interesting. If it weren't for this dependency then AWT would not (for static calls at least) be dependent on Swing.
Oh and there was bug in the object contingent computation of the bottom concept (caused by not handling the case of no lower covers). It has been fixed now.