@WebServlet("/hello")
public class MainServlet extends HttpServlet {

     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
     {
          resp.setContentType("text/html");
          PrintWriter printWriter = resp.getWriter();
          printWriter.write("Good morning!");
          printWriter.close();
     }
}

C:\Users\echig\.jdks\openjdk-22.0.1\bin\java.exe "-Dcatalina.home=C:\Program Files\Apache Software Foundation\Tomcat 9.0"
-Dcatalina.base=C:\Users\echig\.SmartTomcat\MyServlet1\MyServlet1
-Djava.io.tmpdir=C:\Users\echig\.SmartTomcat\MyServlet1\MyServlet1\temp
-Djava.util.logging.config.file=C:\Users\echig\.SmartTomcat\MyServlet1\MyServlet1\conf\logging.properties
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3\lib\idea_rt.jar=59545:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3\bin"
-Dfile.encoding=UTF-8
-Dsun.stdout.encoding=UTF-8
-Dsun.stderr.encoding=UTF-8
-classpath "C:\Program Files\Apache Software Foundation\Tomcat 9.0\bin\bootstrap.jar;C:\Program Files\Apache Software Foundation\Tomcat 9.0\bin\tomcat-juli.jar"
org.apache.catalina.startup.Bootstrap start

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.example</groupId>
     <artifactId>MyServlet1</artifactId>
     <packaging>war</packaging>
     <version>1.0-SNAPSHOT</version>
     <name>MyServlet1 Maven Webapp</name>
     <url>http://maven.apache.org</url>
     <dependencies>
          <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>3.8.1</version>
               <scope>test</scope>
          </dependency>
          <dependency>
               <groupId>javax.servlet</groupId>
               <artifactId>javax.servlet-api</artifactId>
               <version>4.0.1</version>
          </dependency>
     </dependencies>
     <build>
          <finalName>MyServlet1</finalName>
     </build>
</project>

@WebServlet("/hello")
public class MainServlet extends HttpServlet {

     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
     {
          resp.setContentType("text/html");
          PrintWriter printWriter = resp.getWriter();
          printWriter.write("Good morning!");
          printWriter.close();
     }
}