What is the difference between an Applet and a Servlet?
Câu trả lời
An Applet and a Servlet are both Java programs, but they serve different purposes and operate in different environments.
An Applet is a client-side Java program that runs within a web browser on the user's machine. It is typically embedded in an HTML page and downloaded to the client's system, where it executes within the Java Runtime Environment (JRE) of the browser. Applets are used to provide interactive features to web applications that cannot be fulfilled by HTML alone. They have access to the user interface classes such as AWT (Abstract Window Toolkit) or Swing, which allow them to create graphical user interfaces. However, applets require a Java-compatible browser and the necessary plugins to run, and they utilize the resources of the client machine, such as CPU and memory. Due to their nature of running on the client side, applets can face more security issues and also utilize more network bandwidth[1][2][3][5][6].
On the other hand, a Servlet is a server-side Java program that runs on a web server. Servlets are designed to handle requests from clients, process them on the server, and send back a response, typically in the form of an HTML page. Unlike applets, servlets do not have a user interface; they operate in the background on the server. The lifecycle methods of a servlet include init(), service(), and destroy(). Servlets are more secure compared to applets because they run within the server's secure environment and do not require a graphical user interface. They also utilize the resources of the server and are more bandwidth-efficient since they only send the response back to the client rather than the entire program[1][2][3][4][5][6].
