Sun Java Tutorials: java.lang.NoClassDefFoundError:

Question

Hi,
I have recently started with java and been running through the Tutorials.
Here is my computer setup:
Windows EXP Pro
J2SE and NetBeans IDE Bundle NB 4.1 / J2SE 5.0 Update 3 FCS
Firefox 1.0.4 (java/javascript enabled)
Eclpise 3.1.0
I have been encountering the following problem quite often with those tutorials:
Some of those just wont work on my browser eg. http://java.sun.com/docs/books/tutorial/2d/display/ShapeMover.html
Java console gives following errors:
java.lang.NoClassDefFoundError: SMCanvas
     at java.lang.Class.getDeclaredConstructors0(Native Method)
     at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
     at java.lang.Class.getConstructor0(Unknown Source)
     at java.lang.Class.newInstance0(Unknown Source)
     at java.lang.Class.newInstance(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
However some of them work just fine. eg.
http://java.sun.com/docs/books/tutorial/2d/images/BufferedShapeMover.html
If I download the code for them and compile using the Eclipse3.1.0, everything works just fine.
Can this be a problem with the classpath variable? I honestly don't understand anything about using that, but since some of those work and some don't, I don't believe it is a problem with classpaths (but what do I know...).
So, if you have any advise to give I'd be grateful for it.

Answer 1

So, if you have any advise to give I'd be grateful for it.The problem is not yours or your classpath (as the prior replies indicate.)
It's caused by erroneous, missing or mislocated files at the Java Tutorial website.
The Tutorial html file that's executed when you click the link in the page specifies the location of the applet files - typically in a subdirectory. The class file or some other file can't be found, causing the error.
This has been a continuing problem with the Tutorial, apparently due to the updating that goes on. If you wish to let the Tutorial maintainers, know about the error, there's a link on the Tutorial's main page.