[polymorphism]

Hi all,

Code:

public interface ActionListener{
public actionPerformed(ActionEvent e);
}

According above code the heading of the JButton method to associate itself with an ActionListener is

Code:

public void addActionListener(ActionListener aListener);

So, Why was the parameter aListener chosen to be of an interface
type in this header?


I think that because the parameter aListener its type interface.

What do you think??