Understanding this error list

Hi All,

I have this program in an iBook, Mac OS 9.2.2 with Java 1.0.2.
While it compiles with no error, it refuses to run based on the errors
noted below.

Help would be appreciated.

bH

import java.applet.*;
import java.awt.*;
import java.net.*;

public class URLShoTextBtn_06a extends Applet {
  TextField textFld = new TextField(30);

  Button GetTextBtn = new Button("Get Text");
  Panel upperPanel = new Panel();

  public void init() {
    setLayout(new BorderLayout(5,5));
    upperPanel.setBackground(Color.blue);
    add("North", upperPanel);
    upperPanel.add(textFld );
    upperPanel.add(GetTextBtn);

  }
  // event method applies to java version 1.0.2 iBook and a one button
only
    public boolean action(Event evt, Object arg) {
      if (evt.target instanceof Button){
        try {
        getAppletContext().showDocument(new URL(textFld.getText()));
      }
      catch (Exception e) {;}
      }
      return(true);
    }
  }

10/26/2006 @ 11:15:5
An exception occurred:
java.lang.ClassNotFoundException:

URLShoTextBtn_06a.class
at
com.apple.mrj.JManager.JMAppletClassLoader_IMPL.loadClass(JMAppletClassLoaderOld.java)

at
com.apple.mrj.JManager.JMAppletClassLoader_IMPL.loadClass(JMAppletClassLoaderOld.java)
at
com.apple.mrj.JManager.JMAppletClassLoader_ROOT.loadClass(JMAppletClassLoaderOld.java)
at
com.apple.mrj.JManager.JMAppletViewer_OLD.doLoadCode(JMAppletViewerOld.java)
at
com.apple.mrj.JManager.JMAppletViewer_OLD.setState(JMAppletViewerOld.java)
at
com.apple.mrj.JManager.JMViewerEvent.post(JMAppletViewerOld.java)
at
com.apple.mrj.JManager.AVDispatcherThread.run(JMAppletViewerOld.java)