The downside is that to implement an interface, you must implement all the specified methods.
最后阶段是实现接口，您必须实现所有指定的方法。
The other part is to implement an interface to accept SQL queries from the user, execute those queries and build an XHTML web page with embedded SVG elements.
另一部分是实现一个接口，以便接受来自用户的SQL查询，执行那些查询，并构建一个包含嵌入的SVG元素的XHTMLweb页面。
In most cases, it is easier to extend DefaultHandler and override the methods that are relevant for the application rather than to implement an interface directly.
在大多数情况下，为应用程序扩展DefaultHandler并覆盖相关的方法要比直接实现一个接口更容易。
Because the compiler will only allow you to implement an interface.
因为编译器只允许你实现接口。
A class is said to implement an interface when it contains implementations for all the members defined in an interface.
当一个类含有在一个接口中定义的所有成员的实现时，称这个类实现了一个接口。
To implement an interface member, the corresponding member on the class must be public, non-static, and have the same name and signature as the interface member.
若要实作介面成员，对应的类别成员必须是公用、非静态，而且具有与介面成员相同的名称和签章。
To implement an interface member, the corresponding member on the class must be public, non-static, and have the same name and signature as the interface member.
若要实作介面成员，对应的类别成员必须是公用、非静态，而且具有与介面成员相同的名称和签章。
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