When I\'m editing a Java class in Eclipse, when my cursor is over a class variable, I can do Ctrl+T to have a popup that shows all its parents and subc
For Mac users who come here, this is the shortcut for IntelliJ 14.1.4:
⌃+H by default.
I don't know about prior versions, but in IntelliJ version 13 you can go into your Keymap preferences, search for "Implementations", and bind that to Ctrl+T. It will work very much like the Eclipse equivalent.
In IntelliJ IDEA 12, it's Navigate > Type Hierarchy (Ctrl+H by default).