Applied Design Patterns with Java

Structural :: Adapter (137) {C ch 9}

Examples - UML : JTwoList and JTwoClassList

Example - Java :: Patterns\Structural\Adapter

Pattern Concept: to convert the programming interface of one class into that of another. This can be done either by inheritance (class adapters, JTwoClassList example) or by composition (object adapters, JTwoList example).

Issues of the Adapter pattern include:

• Java itself makes HEAVY use of adapters, like Window Adapters which have Listeners to encapsulate specific events;
• Two-way Adapters allow an object to be viewed as being of different types by different classes, as illustrated here.

The example Java programs are called 'JTwoList' and 'JTwoClassList'.

The UML diagrams are above, and the list of Java files is below:

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