WEBVTT

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Welcome to Week 10

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continuing the case study

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Library classes, refactoring and inheritance

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Last week you saw the second increment

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in the development of the Java adventure game program.

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This week you will see the third increment

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which again builds on the outcome of the previous one

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to meet more of the requirements of the program.

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In this increment we meet

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two further requirements.

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And learn about the way that Java programs run

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and the library classes that the Java API

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provides as the building blocks to support program development.

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You will also learn how to refactor code

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to improve it's design.

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And see an example of how unit testing helps with this.

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And you will learn about two important concepts

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in object orientated programming.

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Inheritance

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and Polymorphism.