I suggest you doing it using Netbeans.

STEP 1:

1. File -> New Project -> Select Java With Maven -> Select Web Application

2. Name and Location: You give the project name (this becomes your context path by default)

3. Settings > Choose Server: choose the server you want to use to run your servlets (Apache Tomcat, GlassFish, etc...)

4. Click Finish

Now NetBeans generates a basic webapp for you.

STEP 2:

Then, you need to add the servlet :

1. Right-Click on your project name -> New -> Servlet

2. Enter Class Name

3. URL Pattern: /"yourURLPattern"

4. Click Finish

Netbeans should create the class and register it via @webServlet or web.xml

On the body of the Servlet method, since Tomcat 10+ migrated from javax.servlet to jakarta.servlet, if your code uses javax.*, pick Tomcat 9 or GlassFish. But if you want to keep using Tomcat 10/11, change imports from javax. * to jakarta. *.

STEP 3:

• Right-click Project name → Run.

• NetBeans will start the server, deploy the app, and open your browser.

Your servlet URL will be:

http://localhost:8080/yourProjectName/URLPattern

If it opens your browser in a port different from 8080, you have to change it accordingly.