Hello,

I am a Java beginner. I am running XP and have
downloaded J2SE SDK from the SUN web site.
The SDK is installed directly under my C-drive,
It looks like:
          C:\j2sdk1.4.2_10 with subdirectories
bin (containing java.exe) and lib (containing tools.jar).

I have included C:\j2sdk1.4.2_10\bin in the Path. I have
also created Classpath = C:\j2sdk1.4.2_10\bin.

I am now able to compile text files (.java) to .class files
using the command line (DOS window).

I have a very simple program called Hello and I keep Hello.java
and Hello.class in C:\Workspace.
However, when I try to run the .class file I get:

C:\Workspace>java Hello (return)
Exception in thread "main" java.lang.NoClassDefFoundError: Hello

C:\Workspace>_

I dont think there is anything wrong with the code in 'Hello' because
I have tried tried other demo .class files and I get the same error.

Anyone any idea what I could do about this? (I want to get down
to writing code!).

Thanks, Ernie

Its either because you did not name the file Hello.java , you may mistakenly have used hello.java and java is case sensitive.

or you have inside your code a class named "hello" instead of "Hello"

No, I have rewritten and recompiled everything
in lower case only (hello) and I still get the
same error message. Any other suggestions?

Ernie.

Dear E,
If you post your code it would help. But, from the error, did you have your class "main(String[] blaa blaa" set-up correctly like:

"public class Hello {

public static void main(String[] args) { "

Just check it out, and otherwise post your code so we can help you out.

I got it .Thank you




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