Re: [jgrapht-users] Bug help

[John S. <js...@gm...>]

Since you are overriding equals/hashCode, you are opting for object value
semantics rather than object identity semantics.  As a result, there can be
multiple equivalent objects floating around for the same vertex.  This
doesn't play well together with having additional data (such as the
children array) hanging off of those objects.

So to fix your bug, you have two options:

a) remove both equals and hashCode to make sure your vertex objects are
unique

or

b) use a String for your vertex type, and keep a separate map from String
to Node