Any weblinks for asking help with java JCreator?

I have just installed JCreator on my new computer for making java programs but it doesn't work and I don't know why and I want to know if anyone knows of a suitable forum weblink I can ask for help. I googled searched for such a weblink but got nowhere.

In case there is a java expert that can help me here;
the problem is that my program is;


public class Humy_programs {

public static void main(String[] args) {

// TODO, add your application code
System.out.println("Hello World!" );
}
}




But when I try and compile that I get the following error displayed in the Build Output panal;



--------------------Configuration: Humy_programs - JDK version -9.0.4 <Default> - <Default>--------------------
javac: invalid flag: C:\Users\Laptop\Documents\JCreator LE\MyProjects\Humy_programs\src\Humy_programs.java
Usage: javac <options> <source files>
use --help for a list of possible options

Process completed.



I have windows 10 and I have downloaded JDK like I should.
Any ideas?

I just tried complying a slightly different program of;

public class humy {

public static void main(String[] args) {

// TODO, add your application code
System.out.println("Hello World!" );
}
}

But, strangly, get a totally different compiler error message in the Builder Output panel of;


--------------------Configuration: humy - JDK version -9.0.4 <Default> - <Default>--------------------
Error: Could not find or load main class humy
Caused by: java.lang.ClassNotFoundException: humy

Process completed.


-that is got to be a big clue to what is wrong! WHY is there no class 'found'!?