Interface in Java

Interfaces can be used to implement the Inheritance relationship between the non-related classes that do not belongs to the same hierarchy, i.e. any Class and any where in hierarchy.  Using Interface, you can specify what a class must do but not how it does.

  1. A class can implement more than one Interface.
  2. An Interface can extend one or more interfaces, by using the keyword extends.
  3. All the data members in the interface are public, static and Final by default.
  4. An Interface method can have only Public, default and Abstract modifiers…. More

Servlet Lifecycle

A servlet is a small Java program that runs within a Web server. Servlets receive and respond to requests from Web clients, usually across HTTP, the HyperText Transfer Protocol.
The methods which are used to initialize a servlet, to service requests, and to remove a servlet from the server are called servlet life cycle methods. These are three methods namely init(), service(), destroy()… More

Java Servletes

Servlet is a Java class used to extend the capabilities of servers that host applications accessed via a request-response programming model. Although servlets can respond to any type of request(like HTTP, FTP), they are commonly used to extend the applications hosted by Web servers.
Servlets runs at Server side typically Web Server or Application server, and respond to request by giving the response to user after processing the request…… More