Hello World in Servlet Java.

*First You need to Download Tomcat server for execute Servlet java File.

~ Tomcat 8 Download : https://tomcat.apache.org/download-80.cgi

~ After Download tomcat-8.5.11.exe file you have to install them and remember port number.

*How to start tomcat server and test them.

~ First go Tomcat 8 Folder at Program file.

~ C:\Program Files\Apache Software Foundation\Tomcat 8.5\bin

~Right Click on Tomcat 8 and run as Administrator.

~ After run. open any browser and type at url :"localhost:portnumber"

~For Ex My port Number is 8088 then i have to tpye url like:"localhost:8088".

~ If you have successfully  done then Browser Page Look likes below page.

*Let's Start Hello World in Servlet java.

~ First you are beginners then you have to use Eclipse,NetBeans.

~If you are learning for Exam perpose then you should use notpad & CMD.

Hello.java

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class Hello extends HttpServlet {

    

    public void doGet(HttpServletRequest rq,HttpServletResponse res) throws IOException

    {

        PrintWriter out=res.getWriter();

        

        out.println("Hello World form other World");

        

    }
 }

*Web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

  version="3.1">

    <servlet>

        <servlet-name>hello</servlet-name>

        <servlet-class>Hello</servlet-class>

    </servlet>

    

    <servlet-mapping>

        <servlet-name>hello</servlet-name>

        <url-pattern>/hellow</url-pattern>

    </servlet-mapping>

</web-app>

Thanks ;)

Happy Coding