How to create new instance of an abstract?

Question

I just downloaded a *.jar library.
In my code, I imported the right class.
When I create a new instance Netbean complaints "blah is an abstract: can not instantiated"
So when I looked at blah class code:
It looks like this:
public abstract class blahblah extends DataFrame
   protected blahblah(byte[] data)
      super(data);
   }huh? How can I instantiate this bad boy then?

Answer 1

jverd wrote:
firewind4000 wrote:
huh? How can I instantiate this bad boy then?You can't. You can only instantiate a concrete subclass.Yup. There are two possibilities:
1. BlahBlah was designed for client (you!) subclassing. You should define a concrete ( = not abstract) subclass X of BlahBlah :
public class X extends BlahBlah {...}and then instantiate X.
2. There is a factory method somewhere in this framework that returns objects of type BlahBlah. Use it:
BlahBlah myObj = factory.createBlahBlah();In this case there is probably a non-public subclass of BlahBlah defined in the framework that you don't need to know the details of.