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Interface vs Base class
I was just thinking about when should some one go for Interface rather than an abstract class. I know interface is useful for multiple inheritance but apart from that what other advantages it provides over abstract class?
相互关系界定了行为合同。 如果你想要提供共同执行或共同守则等,则使用抽象课程。
接口用于表示某种类型的provides执行,以便预期接口的代码知道如何处理。 只要您的习俗阶层实施交接,我的公众人物就能够把你的班子作为我的接口并与之合作。
摘要为衍生类型提供执行,接口要求执行类型。
浏览器比抽象的班级更喜欢接口。 如果你需要提供某种执行,就设立一个抽象的类别,以落实你的基调。 因此,你可以提供一些执行,而你则选择延长你的抽象类别或实施接口。
摘要班级迫使你延长合同期。 既然你们的构成比继承更可取,那么就更容易使你自己的阶级与你的个人经历相处,而后者则实施交错和与你的包裹相提并进。 (例如,战略模式)
了解有效的java,项目18,以获得进一步信息。
一类人可以实施多个接口,但只能继承一个抽象的类别。
此外,还有异质。 授予一个班级表示<代码>is-a 关系,在实施接口时,您有<代码>has-a 关系。
利用接口和构成(所谓的strategy) 模式)使设计非常灵活,可在操作时加以改变。
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