Cs1.Keyboard strikes back

When I have tryed to run a program using the cs1.Keyboard function, I got the following error message:
Exception in thread "main" java.lang.NoClassDefFoundError: cs1/Keyboard
at Message.main(Message.java:15)
The error only occoured while running the program not while compiling it and was most likely triggered by the program line:
usrDef= Keyboard.readString();
(Where userDef is my variable).
Anyone have any idea whats went wrong?

http://forum.java.sun.com/thread.jspa?threadID=442041&messageID=1993657
this person had the same problem you did.
there are classes that are part of Java.
you load them when you do...
import java.awt.Whatever
your cs1.keyboard class isnt part of the java library.
you need to find here it is. put it somewhere and then
tell java where it is.
find cskeyboard.class or whatever it is called
then put the path to that file in your classpath
java -classpath C:/whereever_i_have_cs1keyboard MyProgram

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