How to visualise hierarchy of classes when using them?

Question

Some classes extend other class that extend other class how is one ment to think about that?

Answer 1

Nobody I believe you will find this little tool handy http://www.class-visualizer.net/ Hope it helps.

Answer 2

if it is standard api there is tree option in menu, it shows hierarchy of package
https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/package-tree.html