For another, a single class can implement multiple interfaces.
另一方面，单个类可以实现多个接口。
The class files from the second package implement the interfaces from the first.
第二个包中的类文件实现了第一个包中的接口。
Suppose you have a derived class D whose base class B has implemented some interfaces.
假设有个类型D，它的基类B实现了某些接口。
No special interfaces or class path restrictions.
无特殊接口或者类路径限制。
Interfaces are not part of the class hierarchy, although they work in combination with classes.
接口不是类的层次结构的一部分，虽然他们结合班工作。
Interfaces are useful when you cannot use class inheritance.
在无法使用类别继承的情况下，介面是相当有用的。
A class may implement several interfaces.
interface一个类可以实现多个接口。
A class may implement several interfaces.
interface一个类可以实现多个接口。
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