A JSR-286 standard portlet extends which type of portlet?

A JSR-286 standard portlet extends a Generic Portlet. This is because the JSR-286 (Java Specification Request) defines the portlet standard for Java applications used within a portal. The Generic Portlet serves as a base class that provides the foundational functionality for creating portlets adhering to this specification.

By extending the Generic Portlet, developers can implement the required lifecycle methods and behaviors defined by the JSR-286 standard while also leveraging the capabilities provided by the Generic Portlet class. This allows for a consistent approach to building portlets that can seamlessly integrate and function within diverse portal environments.

Other types of portlets, such as Liferay Portlet, MVC Portlet, and Struts Portlet, may include additional features or frameworks that are specific to their respective structures and implementations, but they do not adhere strictly to the JSR-286 specification in the same foundational way as a Generic Portlet. Hence, choosing the Generic Portlet as the base class for JSR-286 portlets is appropriate.