## Uses of Class
javax.servlet.ServletException

Packages that use ServletException
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.

Uses of ServletException in javax.servlet

Subclasses of ServletException in javax.servlet
`class` `UnavailableException` Defines an exception that a servlet or filter throws to indicate that it is permanently or temporarily unavailable.

Methods in javax.servlet that throw ServletException

`Servlet`

`ServletContext.getServlet(java.lang.String name)`
Deprecated. As of Java Servlet API 2.1, with no direct replacement.

This method was originally defined to retrieve a servlet from a `ServletContext`. In this version, this method always returns `null` and remains only to preserve binary compatibility. This method will be permanently removed in a future version of the Java Servlet API.

In lieu of this method, servlets can share information using the `ServletContext` class and can perform shared business logic by invoking methods on common non-servlet classes.

`void` `Servlet.init(ServletConfig config)` Called by the servlet container to indicate to a servlet that the servlet is being placed into service.
`void` `Servlet.service(ServletRequest req, ServletResponse res)` Called by the servlet container to allow the servlet to respond to a request.
`void` `RequestDispatcher.forward(ServletRequest request, ServletResponse response)` Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server.
`void` `RequestDispatcher.include(ServletRequest request, ServletResponse response)` Includes the content of a resource (servlet, JSP page, HTML file) in the response.
`void` `GenericServlet.init(ServletConfig config)` Called by the servlet container to indicate to a servlet that the servlet is being placed into service.
`void` `GenericServlet.init()` A convenience method which can be overridden so that there's no need to call `super.init(config)`.
`abstract void` `GenericServlet.service(ServletRequest req, ServletResponse res)` Called by the servlet container to allow the servlet to respond to a request.
`void` `FilterChain.doFilter(ServletRequest request, ServletResponse response)` Causes the next filter in the chain to be invoked, or if the calling filter is the last filter in the chain, causes the resource at the end of the chain to be invoked.
`void` `Filter.init(FilterConfig filterConfig)` Called by the web container to indicate to a filter that it is being placed into service.
`void` `Filter.doFilter(ServletRequest request, ServletResponse response, FilterChain chain)` The `doFilter` method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain.

Uses of ServletException in javax.servlet.http

Methods in javax.servlet.http that throw ServletException
`protected void` `HttpServlet.doGet(HttpServletRequest req, HttpServletResponse resp)` Called by the server (via the `service` method) to allow a servlet to handle a GET request.
`protected void` `HttpServlet.doHead(HttpServletRequest req, HttpServletResponse resp)` Receives an HTTP HEAD request from the protected `service` method and handles the request.
`protected void` `HttpServlet.doPost(HttpServletRequest req, HttpServletResponse resp)` Called by the server (via the `service` method) to allow a servlet to handle a POST request.
`protected void` `HttpServlet.doPut(HttpServletRequest req, HttpServletResponse resp)` Called by the server (via the `service` method) to allow a servlet to handle a PUT request.
`protected void` `HttpServlet.doDelete(HttpServletRequest req, HttpServletResponse resp)` Called by the server (via the `service` method) to allow a servlet to handle a DELETE request.
`protected void` `HttpServlet.doOptions(HttpServletRequest req, HttpServletResponse resp)` Called by the server (via the `service` method) to allow a servlet to handle a OPTIONS request.
`protected void` `HttpServlet.doTrace(HttpServletRequest req, HttpServletResponse resp)` Called by the server (via the `service` method) to allow a servlet to handle a TRACE request.
`protected void` `HttpServlet.service(HttpServletRequest req, HttpServletResponse resp)` Receives standard HTTP requests from the public `service` method and dispatches them to the `do` XXX methods defined in this class.
`void` `HttpServlet.service(ServletRequest req, ServletResponse res)` Dispatches client requests to the protected `service` method.

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