java.lang.NoClassDefFoundError

[BoomPony]

I'm trying to run a program using a batch file, but get this the error message in the command line:

"Exception in thread "main" java.lang.NoClassDefFoundError: tcp/TCPServer
Caused by: java.lang.ClassNotFoundException: tcp.TCPServer
at java.net....blah blah

...Could not find the main class: tcp.TCPServer. Program will exit."

I'm working in windows using eclipse, is this something do to with my settings like the class path or something? I'm bamboozled.

Thanks x

[Tolls]

Do you have a tcp.TCPServer class?

[BoomPony]

Yes. the class is called TCPServer, and it's in a folder called tcp, since that's the name of the package that TCPServer is part of.

[Tolls]

Where are you running the java command from?
The directory that contains the tcp directory?

[BoomPony]

Yeah that's right. Not the directory where the TCPServer class itself is, one level up from there, where the tcp folder is, and the tcp folder contains the class

[Tolls]

Hmmm.
What happens if you do something like:
java tcp.TCPServer
to run it?
Rather than using the batch file.
I know you'll get other class def problems, but if it gets past the TCPServer then that means there's a problem in how your batch file is working.

[BoomPony]

I get the same error. That's exactly what my batch file contains anyway so it shouldn't make a difference should it?

My batch file contains:

java tcp.TCPServer 7000
pause

[Tolls]

Try it on the command line directly.
I doubt it'll make a difference, it has to be said, but it might rule out the batch file.

Also, are you sure that the tcp directory contains a TCPServer.class?
It might seem a silly question, but I have seen people try to run the java source code before now.

[JosAH]

I get the same error. That's exactly what my batch file contains anyway so it shouldn't make a difference should it?

My batch file contains:

java tcp.TCPServer 7000
pause

If your current working directory is one level up from the tcp directory (where the TCPserver.class file is stored) try to run it as:

java -cp. tcp.TCPServer 7000

kind regards,

Jos