Trivial Windows XP package name problem

Question

I'm trying to run some of my Java apps under XP (I usually work with Linux) and haven't been able to get my package names recognized. (There are many postings on this subject but I haven't found one that solves the problem).
I'm trying to run apps from the 'Command Prompt' (is there another way?). Unnamed packages are no problem, i.e.
java TestClassworks, so the JRE is correctly installed. But things like
java package0.package123.MyClassyield the java.lang.NoClassDefFound exception.
I executed the above command from the directory containing the top level package ('package0'). I also tried
java -classpath . package0.package123.MyClassand
java -classpath C:\FULL\PATH\TO\DIR package0.package123.MyClasswith the same results.
Could the problem be that my package names are longer than 8 characters?
I'm sure there is a very simple solution. Any suggestion would be greatly appreciated - this is driving me nuts.
Thanks,
bw

Answer 1

1. you have to have at the begining at your java file:
package package0.package123;
//import statements
class MyClass{}
2. your MyClass.class should be in the directory structure
package0\package123\MyClass.class
3. if you have this directory structure for instance in c:\temp, then type java -classpath c:\temp package0.package123.MyClass or
java -classpath "c:\temp" package0.package123.MyClass