02115   Java Programming
Autumn 2011

Preparations for the week

• It was a pleasure to see that about 20 of you joined the lectures to hear about Chapter 14 of the BK textbook.
  In addition I draw your attention to the material available from the subpages
  • Supplementary notes material
  • Some Java supplement
  From the last one we took a closer look at Beauty and the Beast comparing an object-oriented solution with a more traditional one. I think it was for the first time you saw auxiliary classes declared private in the class where objects of those classes should be used. Maybe, that idea could be useful for some classes of the Mandatory Assignment
• Only 4 of you joined the exercise class after the one hour lecture. Of course you are free to work at home. I hope it's because most of you don't have problems with the assignment

• Instead of using CRC cards you could start looking for the data structures best suited to easily handle the commands. Play scenarios and find out how to interact with the data structures. During that process make improvements and suggestions to methods.
  Next step is to place the data structures as fields in the appropriate classes and add methods
• It's important to separate the model from the view in order easily to switch between the two views, the text interface and the GUI, refer to section 13.7.5, pages 439-441 of the BK textbook
• Some of the collection classes require overwriting of methods equals and hashCode of class Object. Refer to section 9.8, pages 290-292 of the BK textbook, and to section 22.8, pages 104-105 of the PS textbook
• It could be useful to apply enumerated types
• Handling error messages and present them either in a line based user interface or in a GUI could be generalized by use of exceptions
• The simplifications made in stating the problem to be solved imply that only one film will be shown on one day in a particular cinema having only one hall
• Answers to questions posed to Ville and Finn Gustafsson should be available for all of you as part of the course homepages:
        Questions asked and some answers

The lectures

Exercises at the PC's