Sample Code: Console Listeners

public class VProcMgr implements Tool, VConsoleActionListener {

    private Vector consoleListeners = new Vector();

    ...

    /**
     * Adds the specified console actions listener to receive events for actions
     * by our subcomponents.
     *
     * @param listener	the console action listener to forward events to
     */
    public void addConsoleActionListener(VConsoleActionListener listener) {

	if (listener != null)
	    consoleListeners.addElement(listener);

    } // addConsoleActionlistener


    /**
     * Notify all registered listeners of the specified console event.
     *
     * @param e     the console action event
     */
    public void fireConsoleAction(VConsoleEvent e) {

	for (int i = 0; i < consoleListeners.size(); i++) {
	    VConsoleActionListener l = (VConsoleActionListener)
		consoleListeners.elementAt(i);
	    l.consoleAction(e);
	}

    } // fireConsoleAction

    ...

    VConsoleEvent ev = new VConsoleEvent(...);
    fireConsoleAction(ev);

    ...
}