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Contents
Introduction
Java Programs
Classes
The GCU adventure game
Objects in the adventure game
Modelling the adventure game
Designing vs. implementing programs
What’s next?

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Programming techniques in this chapter:
Arrays, static variables and methods, constants, do-while loop, main method
Class associations in this chapter:
"has-a" relationships - one-to-one and one-to-many

Contents
Interaction between game and players
The Player class in Java
Implementing the interaction
Arrays
Static, final and constants
Loops: do-while
The main method
The Game class in Java

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Programming techniques in this chapter:
stepwise refinement, unit testing, documentation, enhanced for loop
Class associations in this chapter:
"has-a" relationships, "uses-a" relationships

Contents
Interaction between rooms and items
The Item class in Java
Implementing the interaction
Algorithms and stepwise refinement
Unit testing
Documentation
The Player class - using the Item and Room classes

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Programming techniques in this chapter:
library classes, using API documentation
Class associations in this chapter:
self relationships

Contents
The Java platform
Using library classes
Using the ArrayList library class
Testing the new Room class
Linking rooms together
More changes to Room? Test Again!
Creating the game “world”

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Programming techniques in this chapter:
Inheritance, polymorphism, casting, switch statement
Class associations in this chapter:
“is-a” relationships, “uses-a” relationships

Contents
Different kinds of items
Inheritance
Polymorphism
Casting
Introducing interactivity - handling commands
The Command class
The Parser class
Processing a Command
The switch statement
The modified game loop
Running the game