Which class does a JSR-286 standard portlet typically extend in its implementation?

A JSR-286 standard portlet typically extends the Generic Portlet class in its implementation. The JSR-286 specification, also known as the Portlet Specification 2.0, defines a standard way to create portlets in Java, and the Generic Portlet class serves as a base class that handles the basic functionalities that all portlets should have.

By extending the Generic Portlet, developers gain access to key lifecycle methods such as doView, processAction, and render, which are essential for defining how the portlet behaves in response to user interactions and requests. This class ensures that the portlet adheres to the required specifications set forth by JSR-286 while also providing a framework for further customization.

Additionally, while other options could refer to specific implementations or frameworks within the Liferay ecosystem or even other Java frameworks, they do not align with the JSR-286 specification as directly as the Generic Portlet class does. Thus, by using Generic Portlet as the foundational class, developers can create compliant and functional portlets that integrate well into various portal environments.