SwingPropertyChangeSupport does not provide any advantages over java.beans.PropertyChangeSupport.

I suggest to add an API to to it to notify listeners on the Event Dispatch Thread.

One new constractor is to be added:

    /**
     * Constructs a SwingPropertyChangeSupport object.
     *
     * @param sourceBean the bean to be given as the source for any events
     * @param isAsynchronous whether to notify listeners on the <i>Event
     * Dispatch Thread</i>
     * @since 1.6
     */
    public SwingPropertyChangeSupport(Object sourceBean, boolean isAsynchronous) {
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