errors with main class

So I just survived the nightmare of getting everything up and running and I have run into my second problem
Im trying to compile my second app and I get a error saying an exception in the tread "main and a long list of where the eroor is and then it says it cannot find the class

please paste the code and the command prompt output so that we may know what is the error

Also, be sure to use a meaningful subject line

Sam,
You can use the

button to edit the title.

set HelloWorldApp.java in classpath while running the java command.

Kuldip

This error is related with one of the following
1. Name of the java file and Name of the Java Class is diffrent.
2. The same class is included in a package, but the class is not there in
package named folder.

I'm sorry for my absolutenoobishness but how would one go about doing that?

A NoClassDefFoundError almost always means that your classpath is set incorrectly.

The classpath is a list of directories and jar files that Java uses to find *.class files. Normally (by default), Java looks in the current directory for *.class files. When you execute the command java HelloWorldApp, are you in the directory that contains the file HelloWorldApp.class? Did you compile your HelloWorldApp.java source file before you're trying to run it?

Do you have the CLASSPATH environment variable set to anything? If you have, then unset it.

Have a look at Sun's Hello World tutorial, especially the Common Problems page, which also describes the error that you are getting.

sam johnston wrote:I'm sorry for my absolutenoobishness but how would one go about doing that?

I didnt get you on this.... What do you mean by that?

You could quote a sentense on which you want to comment.

[Off topic: When did starting sentences with "so" become trendy? There was actually a thing about it on Quirks and Quarks a few months ago, but I was left unsatisfied.]

I have never had to set my classpath, and I've compiled dozens of applications.

I agree with this:

Aditya Kanitkar wrote:This error is related with one of the following
1. Name of the java file and Name of the Java Class is diffrent.
2. The same class is included in a package, but the class is not there in
package named folder.

Sam, post your code, please.

This seems to be an error with javac I am not even able to generate a .class I have been looking at the tutorial on suns website with no luck. Even downloading their pretyped version of the code still yields me the same error I posted above.

I have messed with it some more and here are my results

sam johnston wrote:I have messed with it some more and here are my results
C:\Users\Hotchocolate\java>"\Program Files\Java\jdk1.6.0_18\bin\javac" HelloWorl dApp.java javac: file not found: HelloWorldApp.java Usage: javac <options> <source files> use -help for a list of possible options

Well, basically, the error message is pretty self explanatory.

Henry

Indeed that was why I was wondering what was wrong but everything has worked out WOOOT!