Additional lessons for the level

Inheritance, composition and agregation

This article illustrates the concepts of inheritance and composition in Java. The first example will help you understand inheritance. The later examples will help you understand how to use composition to improve your use of inheritance.

Multiple inheritance in Java. Comparison of composition and inheritance

This article shows examples of inheritance of nested classes.

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Java Core, level 3, lesson 2

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Beer

Beer

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Java Core, level 3, lesson 2

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Beer. Part 2. The recovery.

Beer. Part 2. The recovery.

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Java Core, level 3, lesson 2

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Don't mix beer with cola

Don't mix beer with cola

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Java Core, level 3, lesson 2

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Selectable and Updatable

Selectable and Updatable

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Java Core, level 3, lesson 2

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Four mistakes

Four mistakes

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Java Core, level 3, lesson 2

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Buggy initializeIdAndName

Buggy initializeIdAndName

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Java Core, level 3, lesson 2

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Parameterized interface

Parameterized interface

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Java Core, level 3, lesson 2

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Hey, are you alive?

Hey, are you alive?

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Java Core, level 3, lesson 2

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All that moves

All that moves

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Java Core, level 3, lesson 2

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Future manager

Future manager

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