What is the difference between a JSP and a Servlet?

A JSP (JavaServer Page) is a web page that contains Java code and is compiled into a Servlet before it is executed. A JSP is typically used to generate dynamic content for a web page, such as a database query or a user login.

A Servlet is a Java class that is executed when a request is made to a web server. A Servlet is typically used to process requests from a web page, such as a form submission or a login request.

For example, a JSP might be used to generate a web page that displays a list of products from a database. The JSP would contain the code to query the database and output the results in HTML. The Servlet would be used to process the form submission from the web page, such as when a user adds a product to their shopping cart. The Servlet would then update the database accordingly.

What is the difference between a Java applet and a Java servlet?

A Java applet is a small application written in Java and embedded in a web page. It runs in the context of the web browser, and is typically used to provide interactive features to a web page, such as a game, calculator, or other interactive content.

A Java servlet is a server-side program written in Java and run in the context of a web server. It is typically used to generate dynamic web content, such as web pages or web services, based on user input.

For example, an applet might be used to provide a calculator on a web page, while a servlet might be used to generate a web page containing the results of a user’s search query.