Newbie Eclipse / classpath problem?

[Fred]

When I attempt to run ANY of the sample application in Eclipse 3.0,
under Linux I get a NoClassDefFoundError. I checked my JRE paths
and they appear correct. This appears to be a path problem, but I
don't see where to fix it. Any suggestions would be greatly
appreciated.


Exception in thread "main" java.lang.NoClassDefFoundError:
org/eclipse/swt/internal/gtk/OS
at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:63) at
org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:54) at
org.eclipse.swt.widgets.Display.<clinit>(Display.java:118) at
org.eclipse.swt.examples.addressbook.AddressBook.main(AddressBook.java:54
)