Generics problem

[Vasco Carmona]

Hello,

I'm trying to code an interface with a method that returns a subtype of a JComponent. Depending which class I implement this interface, I want it to return a JPanel, a JLabel or any other subclass of JComponent.

public interface InterfaceElement{
public <? extends javax.swing.JComponent> getElement();
}

I thought in generics to solve my problem and I try the code above, but it won't work. I would like to know why and a possible solution.

With my best regards

Vasco Carmona

[Stephan van Hulst]

ItDoesntWorkIsUseless.

Where are you having problems?

[Vasco Carmona]

on the method declaration.

the compiler error says that there are expected identifiers.

I've just started to study generics and I don't get the problem.

[Vasco Carmona]

Hi,
I found the solution!!

public interface InterfaceElement{
 public  <E extends javax.swing.JComponent> E getElement();

}