Do not try to skip things. Read and do the whole thing as stated. I have heard that the 1.3 version works right off the bat - wherein there were problems with earlier ones. However the best bet is to do the tutorial with an application as SUN used in the more recent tutorials.

To start a class in a package, (i.e., if a class has defined itself to be in a package (say examples.hello), then when it compiles, it will put itself into that same directory structure. Specifically examples/hello.
However, to use a class in the directory examples/hello that is in the package examples.hello, you need to be outside of the directory. Thus in the example to generate skeletons and/or stubs, one gives this call
rmic -d $HOME/public_html/myclasses examples.hello.HelloImpl
in the directory before examples/hello

If someone else has already started the registry on the machine you want to use, you cannot do so too. To see (on UNIX) if the registry is running, use the command
top or prstat
it will tell you if it is running and who started it. Always remember to stop the process when you are finished so others can do their work.
• if top is not an option, try
  ps -ef (will tell you all the jobs running)
  ps -ef | grep yourUserName (This will tell you all the jobs running that are yours)
• once you have the number of the job (say 2345), if it is yours, you can stop it with the command
  kill -9 2345

ERRORS

Tried to put web page for the 1.2 HelloWorld example on Expert web
page http://ai-web.ecst.csuchico.edu/modules/rmi/hello.html
with RMI server at
pip:/user/faculty/amk/courses/advjava/rmi/myclasses

java  -Djava.rmi.server.codebase=http://ai-web.ecst.csuchico.edu/modules/advjava/rmi/mysrc -Djava.security.policy=pip.ecst.csuchico.edu:/user/faculty/amk/courses/advjava/rmi/myclasses/policy examples.hello.HelloImpl

java.security.AccessControlException: access denied (java.net.SocketPermission pip.ecst.csuchico.edu resolve)

when I used

java  -Djava.rmi.server.codebase=http://ai-web.ecst.csuchico.edu/modules/advjava/rmi/mysrc -Djava.security.policy=/user/faculty/amk/courses/advjava/rmi/myclasses/policy examples.hello.HelloImpl

 got

HelloServer bound in registry

but when run applet get

HelloApplet exception: security.Couldn't connect to 'pip.ecst.csuchico.edu' with origin from 'ai-web.ecst.csuchico.edu'.
netscape.security.AppletSecurityException: security.Couldn't connect to 'pip.ecst.csuchico.edu' with origin from 'ai-web.ecst.csuchico.edu'.
  at netscape.security.AppletSecurity.checkConnect(AppletSecurity.java:914)
  at netscape.security.AppletSecurity.checkConnect(AppletSecurity.java:926)
  at netscape.security.AppletSecurity.checkConnect(AppletSecurity.java:795)
  at java.lang.SecurityManager.checkConnect(SecurityManager.java:718)
  at sun.rmi.transport.tcp.TCPEndpoint.(TCPEndpoint.java:124)
  at sun.rmi.registry.RegistryHandler.registryStub(RegistryHandler.java:58)
  at java.rmi.registry.LocateRegistry.getRegistry(LocateRegistry.java:113)
  at java.rmi.Naming.getRegistry(Naming.java:156)
* at java.rmi.Naming.lookup(Naming.java:55)
  at examples.hello.HelloApplet.init(HelloApplet.java:21)
  at netscape.applet.DerivedAppletFrame$InitAppletEvent.dispatch(DerivedAppletFrame.java:553)
  at java.awt.EventDispatchThread$EventPump.dispatchEvents(EventDispatchThread.java:81)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:135)
  at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(DerivedAppletFrame.java:911)
HelloApplet exception: security.Couldn't connect to 'pip.ecst.csuchico.edu' with origin from 'ai-web.ecst.csuchico.edu'.
netscape.security.AppletSecurityException: security.Couldn't connect to 'pip.ecst.csuchico.edu' with origin from 'ai-web.ecst.csuchico.edu'.
  at netscape.security.AppletSecurity.checkConnect(AppletSecurity.java:914)
  at netscape.security.AppletSecurity.checkConnect(AppletSecurity.java:926)
  at netscape.security.AppletSecurity.checkConnect(AppletSecurity.java:795)
  at java.lang.SecurityManager.checkConnect(SecurityManager.java:718)
  at sun.rmi.transport.tcp.TCPEndpoint.(TCPEndpoint.java:124)
  at sun.rmi.registry.RegistryHandler.registryStub(RegistryHandler.java:58)
  at java.rmi.registry.LocateRegistry.getRegistry(LocateRegistry.java:113)
  at java.rmi.Naming.getRegistry(Naming.java:156)
* at java.rmi.Naming.lookup(Naming.java:55)
  at examples.hello.HelloApplet.init(HelloApplet.java:21)
  at netscape.applet.DerivedAppletFrame$InitAppletEvent.dispatch(DerivedAppletFrame.java:553)
  at java.awt.EventDispatchThread$EventPump.dispatchEvents(EventDispatchThread.java:81)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:135)
  at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(DerivedAppletFrame.java:911)



When I tried to change the applet to an application I run the application
and get

weird since first thing it talks about is helloApplet???

HelloApplet exception: error unmarshalling return; nested exception is: 
        java.io.InvalidClassException: examples.hello.HelloImpl_Stub; Local class not compatible: stream classdesc serialVersionUID=4635722270992699912 local class serialVersionUID=2
java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
        java.io.InvalidClassException: examples.hello.HelloImpl_Stub; Local class not compatible: stream classdesc serialVersionUID=4635722270992699912 local class serialVersionUID=2
java.io.InvalidClassException: examples.hello.HelloImpl_Stub; Local class not compatible: stream classdesc serialVersionUID=4635722270992699912 local class serialVersionUID=2
        at java.lang.Throwable.fillInStackTrace(Native Method)
        at java.lang.Throwable.(Throwable.java:94)
        at java.lang.Exception.(Exception.java:42)
        at java.io.IOException.(IOException.java:47)
        at java.io.ObjectStreamException.(ObjectStreamException.java:29)
        at java.io.InvalidClassException.(InvalidClassException.java:47)
        at java.io.ObjectStreamClass.validateLocalClass(ObjectStreamClass.java:438)
        at java.io.ObjectStreamClass.setClass(Compiled Code)
        at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:785)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:353)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:232)
        at java.io.ObjectInputStream.inputObject(Compiled Code)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:232)
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Naming.java:89)
        at examples.hello.HelloApp.main(HelloApp.java:22)
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