Run time problem

Question

Hi !
I'm new with Java and it will drive me nuts.
I've to files in F:\javap\Familias:
ModFam.java - where I've the main function
Familias.java - some other classes and methods
each file have the line:
package Familias; at line 1.
Ok.
I compiled from f:\javap using:
java Familias\*.java
No errors and I've 3 class files in f:\javap\Familias:
- ModFam.class
- ModFam$1.class
- Familias.class
First question: what is the $1.class file ?
Now I want to run the application from f:\javap\Familias as follows:
javac -cp . Familias.ModFam
and I get the message: Exception in thread "main" java.lang.NoClassDefFoundError: Familias/ModFam
Second question: Why ? How should I run the program ?
Thanks in advance
<jl>

Answer 1

Since you have your classes in a package, you class files has to be in a directory called Familias, and the CLASSPATH should be set to just before your Familias directory.
Just compile as
javac -d . *.java
-d option just says where you want your source files, and it will also create the directory Familias for you.
Then you run it with java, not javac, as:
java -classpath . Familias.ModFam
Btw, you have a package called Familias, and a class called Familias. The naming convention says that package names should start with lower case letter, so to avoid confusion, it would be better to rename your package to familias.
I'm not even sure you can run your code now, because Familias.ModFam could mean either the class ModFam in the package Familias, or the inner class ModFam in the class Familias. I hope it will check for the package first.