Whats the best thing to do when you can't extend Observable?

[ozzyman]

Hi,

I have some classes which are subclasses of my other classes, for example:

class Lion extends Animal { //but can't also extend Observable
...
}

I want to create a form to edit the object properties of my class, say "Lion Editor", so I wanted to extend Observable
so that I could add the following Observable methods to the my class' setter methods:

    //a method specific to the subclass' object properties
    public void setManeLength(int length) {
        maneLength = length;
    //  methods inherited from Observable:
    //  setChanged();
    //  notifyObservers();
    }

Whats the best way to work around this?

Thanks.

[Fubarable]

One way: You could simply make your own observer framework and make your Observable an interface, not a class.

[ozzyman]

Thanks. I don't know why I didn't think of that.

[Fubarable]

You're welcome. Another option is to use a PropertyChangeSupport and allow for addition and removal of PropertyChangeListeners.