Three ways to go about it.
Hyperlink Method (Mouse + Keyboard)
Press CTRL while hovering over the overriden method.
You should see an option called 'Open Super Implementation. Click it !
From here :
And for bonus points, you can setup a Keyboard shortcut to do this like so :
When you try to setup a keyboard shortcut, you may filter by typing
Open Super Im. On my Eclipse Indigo three matches were found. I tried setting them one by one until the shortcut appeared in
Navigate -> Open Super Implementation like so :
Mouse only - Using the vertical Ruler
Click the ovverride marker that appears in the Vertical Ruler as in the above snapshot.