[FIXED] Faild compilation standard servlet example

Issue

G:\demo3\src\main\java\com\example\demo3>javac HelloServlet.java -classpath "C:\Program Files\Apache Software Foundation\Tomcat 10.0\lib\servlet-api.jar"
HelloServlet.java:8: error: cannot find symbol
public class HelloServlet extends GenericServlet{
                                  ^
  symbol: class GenericServlet
HelloServlet.java:10: error: cannot find symbol
    public void service(ServletRequest servletRequest, ServletResponse servletResponse)
                        ^
  symbol:   class ServletRequest
  location: class HelloServlet
HelloServlet.java:10: error: cannot find symbol
    public void service(ServletRequest servletRequest, ServletResponse servletResponse)
                                                       ^
  symbol:   class ServletResponse
  location: class HelloServlet
HelloServlet.java:11: error: cannot find symbol
            throws ServletException, IOException {
                   ^
  symbol:   class ServletException
  location: class HelloServlet
HelloServlet.java:3: error: package javax.servlet does not exist
import javax.servlet.*;
^
HelloServlet.java:9: error: method does not override or implement a method from a supertype
    @Override
    ^
6 errors

what iam doing wrong? CLASSPATH created to servlet-api.jar file btw enter image description here

Solution

Tomcat 10 is using the new jakarta.* namespace for the servlet packages. You are importing the old javax.servlet.*. Just replace javax.servlet. with jakarta.servlet. and compilation should work.

Answered By - Nikos Paraskevopoulos
Answer Checked By - Timothy Miller (JavaFixing Admin)