During lecture, my professor very quickly created a subclass in Eclipse.
The result has the \"extend\" keyword added to the subclass. I didn\'t see what buttons he
When you are viewing the class you want to subclass, open Type Hierarchy (press F4). Right click on the parent-to-be class, and in the menu go to new -> class ( or Ctrl-n , class ).
Please see the picture where to enter your existing super class
You can try to bind Keys for New (New Wizard: Class) command (for eg.: Ctrl + Alt + N) by open Window> Preferences > General > Keys.
And then, on new wizard window, change the Superclass box.
Hth.
Right click on project name on Package Explorer
+ Add New
Class + Type package
Name, Name
(sub-class name), and Super class
(or Click on Browse to choose super class).