/**
  * Construct a new StartMIDletMonitor instance to track the
  * process of starting a MIDlet in a new Isolate.
  * The new instance is appended to the startPending vector
  * and is registered with the MIDletProxyList to receive
  * notifications if/when the MIDlet starts/fails to start.
  */
 private IsolateMonitor() {
     isolates = new Hashtable();
     listeners = new Vector();
     midletProxyList.addListener(this);
 }