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Rearraging the directory
Apr 29, 2015
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week-0.md

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Homework Due 5/1

The homework this week will focus on Object Oriented programming. To make it easier to do code reviews, please fork this and send a pull request to submit the assignment. Store your files in a folder titled with your name (e.g. unit-1/homework/week-0/amyquispe). Each problem should probably be in its own subfolder under your name.

Problem 1: Animal Sort

  • Create an Animal class that includes a "species name" field and implements the Comparable interface. Compare two animals by species name, alphabetically.
  • Implement equals to compare by species name.
  • Test your compareTo function by creating an array of Animal instances and calling sort.
  • Create the Domestic interface. This interface should include getters and setters for a name field, since pets tend to have their own names.
  • Create a class for a Domestic Animal, perhaps a DomesticCat, that both inherits from Animal and implements the Domesitc interface.
  • Implement the compareTo function for your Domestic animal so that it compares two such animals by their given name instead of their species name.
  • Implement equals to compare by given name.
  • Create a constructor for your Domestic animal that takes in both the species name and given name.
  • Test your compareTo function by creating an array and calling sort.

Problem 2: Cards

  • Create an abstract class representing a game, which includes the method getpieces().
  • Create a class that extends your Game class, PlayingCards.
  • Create a class, Card, representing a playing card.
  • In your constructor for PlayingCards, genereate a 52-deck hand of Cards. (Do not write 52 lines of code to do this). Decide an appropriate collection to store these in.
  • Implement getpieces() which should return your collection of Cards. What should be the type signature for getpieces() in the abstract class?

Problem 3: Return of the text adventure game

Create your own text adventure game! This is a similar concept to one of your earlier assignments but with a few requirements:

  • You must create Character, Weapon and Room classes.
  • Every character must be an instance of a Character or an instance of a sub-class of Character.
  • Every weapon must be an instance of a Weapon or an instance of a sub-class of Weapon.
  • Every room must be an instance of a Room or of a sub-class of Room.
  • You must create an abstract class and use it at least twice.
  • You must create an interface and use it at least twice.
  • You may create other classes including container classes (e.g. the World class may be a collection of Rooms).

This assignment is the more object-oriented version of the previous assignment. Be very careful in the way you design your code. Here's an example: You can make Character an abstract class, and create a Non-Player Character class and a Player Character class inheriting from it, and then make all characters instances of either NPCs or PCs. Although it may take a little more thinking, these kinds of decisions can prevent copy-pasting code and help you debug.

Bonus

Design and implement Battleship using your new object-oriented knowledge. Create a reasonable text-based user interface. Write a simple AI so you can play against your computer.