running servlet in package

[June]

I am reading Core Servlets and JSP and trying to run a servlet in a package.  I have put "package test; " in the source code and compiled it in the dos using javac -d c:\jakarta\webapps\root\web-inf\classes HelloWorld.java with no problem.  After running that command, I have this class file in the c:\jakarta\webapps\root\web-inf\classes\test.  However, when I type "localhost/servlet/test.HelloWorld" in the explorer, I get the following error.   Internal Servlet Error:   java.lang.NullPointerException  at java.lang.ClassLoader.resolveClass0(Native Method)  at java.lang.ClassLoader.resolveClass(ClassLoader.java:588)  at org.apache.tomcat.loader.AdaptiveClassLoader.loadClass(AdaptiveClassLoader.java:430)  at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoader.java:174)  at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:265)  at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289)  at org.apache.tomcat.core.Handler.service(Handler.java:254)  at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)  at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)  at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)  at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:166)  at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)  at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)  at java.lang.Thread.run(Thread.java:484)   Please tell me what I am doing wrong.  The Apache server and the tomcat are running just fine, because I can run this servlet(without the package statement) by typing localhost/servlet/HelloWorld with no problem. Cheers, June