plaint text version of question: hello world w3schools (tomcat)

[Jim McNamara <jm...@proton.me.INVALID>]

Hi-

I am resending my msg. in plain text wondering how to get tomcat to render my servlet for hellworld from code I got at w3schools.

I am trying to follow the guidelines:
TOMCAT 10.1.10 + plain text email!
THANKS 

code and configuration files:

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
 
/**
 * This servlet program is used to print "Hello World" on 
 * client browser by implementing servlet interface.
 * @author w3spoint
 */
 
public class HelloWorld implements Servlet {
    private static final long serialVersionUID = 1L;
 
    //no-argument constructor.
    public HelloWorld() {
 
    }
 
    ServletConfig config=null;
 
    @Override
    public void init(ServletConfig config) throws ServletException {
    	this.config = config;
    	System.out.println("Do initialization here.");		
    }
 
    @Override
    public void destroy() {
	System.out.println("Do clean-up process here.");
    }
 
    @Override
    public ServletConfig getServletConfig() {
       	return config;
    }
 
    @Override
    public String getServletInfo() {
	return "w3spoint.com";
    }
 
    @Override
    public void service(ServletRequest request, ServletResponse response)
		throws ServletException, IOException {
	response.setContentType("text/html");
	PrintWriter out = response.getWriter();
 
        out.println("<h1>Hello World example using " +
   		"servlet interface.</h1>");
        out.close();		
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" 
xmlns="http://java.sun.com/xml/ns/j2ee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 
	<servlet>
		<servlet-name>HelloWorld</servlet-name>
		<servlet-class>
		  HelloWorld
		</servlet-class>
	</servlet>
 
	<servlet-mapping>
		<servlet-name>HelloWorld</servlet-name>
		<url-pattern>/HelloWorld</url-pattern>
	</servlet-mapping>
 
</web-app>


url:

http://localhost:8080/examples/HelloWorld

 <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="false">
	<context docbase="webapps" path="/webapps/examples"/>

error msg:

Root Cause

java.lang.ClassCastException: class HelloWorld cannot be cast to class jakarta.servlet.Servlet 


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