netBeans problem Restated

[elizabeth]

netBeans doesn't Execute the second code Why?
this works

Code:

package HelloWorldApp_pkg;

public class HelloWorldApp {

public HelloWorldApp() {
}

public static void main(String[] args) {
System.out.println("Howdy");
}
}

it doesn't work

Code:

package Project_1_Pkg;

public class HelloWorldApp {
public static void main(String[] args) {
System.out.println("Howdy");
}
}

problem

Code:

"class HelloWorldApp is public, should be declared in a file named HelloWorldApp. java"

Can anyone explain to me why?

[Josiah.Haswell]

There doesn't seem to be a problem with the actual code. Do you have two different HelloWorldApp classes in separate package namespaces? Or do you only have one HelloWorldApp class in the HelloWorldApp_pkg namespace?

Creating two different packages with classes of the same name isn't a problem, but creating a package with a class of one name and declaring that class as belonging to a different namespace will cause problems.

Also, you may want to use standard Java naming conventions for packages. For example, package names should be lowercase, and begin with the top-level domain of your organization (e.g. org.yourapp.yourpackage.yoursubpackage)

Good luck,

Joe