23 lines
940 B
Markdown
23 lines
940 B
Markdown
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---
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layout: pattern
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title: Adapter
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folder: adapter
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categories: pattern_cat
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tags: pattern_tag
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---
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**Intent:** Convert the interface of a class into another interface the clients
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expect. Adapter lets classes work together that couldn't otherwise because of
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incompatible interfaces.
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**Applicability:** Use the Adapter pattern when
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* you want to use an existing class, and its interface does not match the one you need
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* you want to create a reusable class that cooperates with unrelated or unforeseen classes, that is, classes that don't necessarily have compatible interfaces
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* you need to use several existing subclasses, but it's impractical to adapt their interface by subclassing every one. An object adapter can adapt the interface of its parent class.
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**Real world examples:**
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* [java.util.Arrays#asList()](http://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html#asList%28T...%29)
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