Exented own classes

Question

How can I referred to my own classes. I've created an abstract class in a file. And now I want to write a concrete class on this basis. How have I to create a package? Or import the clas?

Answer 1

public class ConcreteClass extends AbstractClass{
}

Answer 2

Newbie you have posted copy of this thread, it has no value attached, so please remove it
https://www.sololearn.com/Discuss/1831370/?ref=app

Answer 3

Thanks D_Stark,
When I do it, like you suggest I get the error, the AbstractClass not found. How I have to configure it, so that the file with the class ist found. I thought it would work with import. But witch path I have to enter.
Just
import AbstractClass does not work.