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Mapping of interited class collection

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rancz

Post subject: Mapping of interited class collection

Posted: Wed May 23, 2007 4:02 am

Newbie

Joined: Wed May 23, 2007 3:53 am
Posts: 1

Hi!

I have an abstract class:

Code:

public abstract class Part {
 public Part() {}
}

And its inherited classes:

Code:

public class Screw extends Part {
....
}

public class Gear extends Part {
....
}

I would like to store parts in a container:

Code:

public class PartContainer {
...
private Set<? extends Part> parts = new HashSet<Part>();    
...

How can I map this situation?

Thanks,
Lajos

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