How can we invoke another servlet in a different application?

We can’t use RequestDispatcher to invoke servlet from another application because it’s specific for the application. If we have to forward the request to a resource in another application, we can use ServletResponse sendRedirect() method and provide complete URL of another servlet. This sends the response to client with response code as 302 to forward the request to another URL. If we have to send some data also, we can use cookies that will be part of the servlet response and sent in the request to another servlet.