Servlet (A Beginners Guide) -

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. To implement this interface, you can write a generic servlet that extends javax. servlet.

Servlet example -

Servlets are Java classes which service HTTP requests and implement the javax. servlet. HttpServlet, an abstract class that implements the Servlet interface and is specially designed to handle HTTP requests. ...

A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.

How it works-

Servlets are the Java programs that runs on the Java-enabled web server or application server. They are used to handle the request obtained from the web server, process the request, produce the response, then send response back to the web server. Properties of Servlets : Servlets work on the server-side

Servlet lifecycle-

A servlet life cycle can be defined as the entire process from its creation till the destruction. ... The servlet is initialized by calling the init() method. The servlet calls service() method to process a client’s request. The servlet is terminated by calling the destroy() method.