为什么要用接口呢?用接口有什么好处呢? 电脑都有usb接口,这其实和php接口差不多。为什么U盘,数据线插在usb接口上,电脑都能识别呢?这是因为各厂家都遵循usb接口这个规范。插入识别,数据传输,不需要知道传输的是什么,这就是接口的好处。还有一个就是
为什么要用接口呢?用接口有什么好处呢?
电脑都有usb接口,这其实和php接口差不多。为什么U盘,数据线插在usb接口上,电脑都能识别呢?这是因为各厂家都遵循usb接口这个规范。插入识别,数据传输,不需要知道传输的是什么,这就是接口的好处。还有一个就是解决单继承的问题。
使用接口(interface),可以指定某个类必须实现哪些方法,但不需要定义这些方法的具体内容。
接口是通过 interface 关键字来定义的,就像定义一个标准的类一样,但其中定义所有的方法都是空的。
接口中定义的所有方法都必须是公有,这是接口的特性。

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