## Uses of Package
javax.servlet

Packages that use javax.servlet
javax.servlet: The javax.servlet package contains a number of classes and interfaces that describe and define the contracts between a servlet class and the runtime environment provided for an instance of such a class by a conforming servlet container.
javax.servlet.http: The javax.servlet.http package contains a number of classes and interfaces that describe and define the contracts between a servlet class running under the HTTP protocol and the runtime environment provided for an instance of such a class by a conforming servlet container.

Classes in javax.servlet used by javax.servlet
FilterChain A FilterChain is an object provided by the servlet container to the developer giving a view into the invocation chain of a filtered request for a resource.
FilterConfig A filter configuration object used by a servlet container to pass information to a filter during initialization.
RequestDispatcher Defines an object that receives requests from the client and sends them to any resource (such as a servlet, HTML file, or JSP file) on the server.
Servlet Defines methods that all servlets must implement.
ServletConfig A servlet configuration object used by a servlet container to pass information to a servlet during initialization.
ServletContext Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file.
ServletContextAttributeEvent This is the event class for notifications about changes to the attributes of the servlet context of a web application.
ServletContextEvent This is the event class for notifications about changes to the servlet context of a web application.
ServletException Defines a general exception a servlet can throw when it encounters difficulty.
ServletInputStream Provides an input stream for reading binary data from a client request, including an efficient `readLine` method for reading data one line at a time.
ServletOutputStream Provides an output stream for sending binary data to the client.
ServletRequest Defines an object to provide client request information to a servlet.
ServletRequestAttributeEvent This is the event class for notifications of changes to the attributes of the servlet request in an application.
ServletRequestEvent Events of this kind indicate lifecycle events for a ServletRequest.
ServletResponse Defines an object to assist a servlet in sending a response to the client.

Classes in javax.servlet used by javax.servlet.http
GenericServlet Defines a generic, protocol-independent servlet.
Servlet Defines methods that all servlets must implement.
ServletConfig A servlet configuration object used by a servlet container to pass information to a servlet during initialization.
ServletContext Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file.
ServletException Defines a general exception a servlet can throw when it encounters difficulty.
ServletInputStream Provides an input stream for reading binary data from a client request, including an efficient `readLine` method for reading data one line at a time.
ServletRequest Defines an object to provide client request information to a servlet.
ServletRequestWrapper Provides a convenient implementation of the ServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet.
ServletResponse Defines an object to assist a servlet in sending a response to the client.
ServletResponseWrapper Provides a convenient implementation of the ServletResponse interface that can be subclassed by developers wishing to adapt the response from a Servlet.

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