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Deployment Descriptor Web Server and Client Web Server is a software that can process the client request and send the response back to the client. For example, Apache is one of the most widely used web server. Web Server runs on some physical machine and listens to client request on specific port. A web client is a software that helps in communicating with the server. Some of the most widely used web clients are Firefox, Google Chrome, Safari etc. When we request something from server through URL , web client takes care of creating a request and sending it to server and then parsing the server response and present it to the user.

It helps client in rendering the data for user. Sometimes multiple hostnames point to same IP addresses and web server virtual host takes care of sending request to the particular server instance.

Why we need Servlet and JSPs? Java Servlet and JSPs are server side technologies to extend the capability of web servers by providing support for dynamic response and data persistence. Since servlet is a server side technology, we will need a web container that supports Servlet technology, so we will use Apache Tomcat server.

For ease of development, we can add configure Tomcat with Eclipse, it helps in easy deployment and running applications.

Go to Eclipse Preference and select Server Runtime Environments and select the version of your tomcat server, mine is Tomcat 7. Provide the apache tomcat directory location and JRE information to add the runtime environment.

Now go to the Servers view and create a new server like below image pointing to the above added runtime environment. Now we are ready with our setup to create first servlet and run it on tomcat server.

You can directly click Finish button to create the project or you can click on Next buttons to check for other options. Again we can click finish or we can check other options through next button.

Our first servlet looks like below. Copy package com. IOException; import java. PrintWriter; import java. Date; import javax. ServletException; import javax.

WebInitParam; import javax. WebServlet; import javax. HttpServlet; import javax. HttpServletRequest; import javax. You can refresh it to check that Date is dynamic and keeps on changing, you can open it outside of Eclipse also in any other browser. So servlet is used to generate HTML and send it in response, if you will look into the doGet implementation, we are actually creating an HTML document as writing it in response PrintWriter object and we are adding dynamic information where we need it.

This is the primary reason for introduction of JSPs. Here is our first JSP program that does the same thing like above servlet.

The final project hierarchy looks like below image in Eclipse. Snake Snake is an older classic video game. It was first created in late 70s.

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Later it was brought to PCs. In this game the player controls a snake. The objective is to eat as many apples as possible. Each time the snake eats an apple its body grows.

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The snake must avoid the walls and its own body. This game is sometimes called Nibbles. Tweet Development of Java Sname game The size of each of the joints of a snake is 10 px.

The snake is controlled with the cursor keys. Initially, the snake has three joints. If the game is finished, the "Game Over" message is displayed in the middle of the board.

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Color; import java. Dimension; import java.

Font; import java. FontMetrics; import java. Graphics; import java. Image; import java. Toolkit; import java.