0. create a JFrame (class construction: new), an "updated" version of java.awt.Frame that is "mostly" compatible
1. show a JFrame (instance methods: setVisible, setSize)
2. create a JButton, JLabel
3. add JButton, JLabel to JFrame (why can both be added? both of class "Component")
4. set Layout of JFrame (use another instance as "property")
5. add ActionListener to JButton (interface: actionPerformed)
6. extend JFrame for organizing the code inside
7. extend JButton for connecting it with the specifc label and specific listener
8. one ActionListener for two buttons (ActionEvent)
9. A "CoutingLabel" class to make "count" and "label text" consistent?
  9.1 outer listeners
  9.2 interface
  9.3 inner classes
  9.4 anonymous classes