private static void check(String what, MBeanNotificationInfo[] mbnis) {
    System.out.print(what + ": checking notification info: ");

    if (mbnis.length == 0) {
      System.out.println("NONE (suspicious)");
      suspicious.add(what);
      return;
    }

    // Each MBeanNotificationInfo.getName() should be an existent
    // Java class that is Notification or a subclass of it
    for (int j = 0; j < mbnis.length; j++) {
      String notifClassName = mbnis[j].getName();
      Class notifClass;
      try {
        notifClass = Class.forName(notifClassName);
      } catch (Exception e) {
        System.out.print("FAILED(" + notifClassName + ": " + e + ") ");
        failed.add(what);
        continue;
      }
      if (!Notification.class.isAssignableFrom(notifClass)) {
        System.out.print("FAILED(" + notifClassName + ": not a Notification) ");
        failed.add(what);
        continue;
      }
      System.out.print("OK(" + notifClassName + ") ");
    }
    System.out.println();
  }
 static {
   // FIXME: RMIServerImpl_Stub is generated at build time
   // after jconsole is built.  We need to investigate if
   // the Makefile can be fixed to build jconsole in the
   // right order.  As a workaround for now, we dynamically
   // load RMIServerImpl_Stub class instead of statically
   // referencing it.
   Class<? extends Remote> serverStubClass = null;
   try {
     serverStubClass = Class.forName(rmiServerImplStubClassName).asSubclass(Remote.class);
   } catch (ClassNotFoundException e) {
     // should never reach here
     throw (InternalError) new InternalError(e.getMessage()).initCause(e);
   }
   rmiServerImplStubClass = serverStubClass;
 }
  public static void main(String[] args) throws Exception {
    System.out.println(
        "Checking that all known MBeans that are "
            + "NotificationBroadcasters have sane "
            + "MBeanInfo.getNotifications()");

    System.out.println("Checking platform MBeans...");
    checkPlatformMBeans();

    URL codeBase = ClassLoader.getSystemResource("javax/management/MBeanServer.class");
    if (codeBase == null) {
      throw new Exception("Could not determine codeBase for " + MBeanServer.class);
    }

    System.out.println();
    System.out.println("Looking for standard MBeans...");
    String[] classes = findStandardMBeans(codeBase);

    System.out.println("Testing standard MBeans...");
    for (int i = 0; i < classes.length; i++) {
      String name = classes[i];
      Class<?> c;
      try {
        c = Class.forName(name);
      } catch (Throwable e) {
        System.out.println(name + ": cannot load (not public?): " + e);
        continue;
      }
      if (!NotificationBroadcaster.class.isAssignableFrom(c)) {
        System.out.println(name + ": not a NotificationBroadcaster");
        continue;
      }
      if (Modifier.isAbstract(c.getModifiers())) {
        System.out.println(name + ": abstract class");
        continue;
      }

      NotificationBroadcaster mbean;
      Constructor<?> constr;
      try {
        constr = c.getConstructor();
      } catch (Exception e) {
        System.out.println(name + ": no public no-arg constructor: " + e);
        continue;
      }
      try {
        mbean = (NotificationBroadcaster) constr.newInstance();
      } catch (Exception e) {
        System.out.println(name + ": no-arg constructor failed: " + e);
        continue;
      }

      check(mbean);
    }

    System.out.println();
    System.out.println("Testing some explicit cases...");

    check(new RelationService(false));
    /*
      We can't do this:
        check(new RequiredModelMBean());
      because the Model MBean spec more or less forces us to use the
      names GENERIC and ATTRIBUTE_CHANGE for its standard notifs.
    */
    checkRMIConnectorServer();

    System.out.println();
    if (!suspicious.isEmpty()) System.out.println("SUSPICIOUS CLASSES: " + suspicious);

    if (failed.isEmpty()) System.out.println("TEST PASSED");
    else {
      System.out.println("TEST FAILED: " + failed);
      System.exit(1);
    }
  }