Update:
List of classes still required as of 8th June 2006:
java/awt/AWTPermission java/awt/Point java/awt/geom/Point2D
I generated a list of required classes for Apache Continuum by running the continuum 1.0.2 release and accessing a number of functions through the web interface.
I then compared the resulting list of 439 JRE classes against those found in the jars generated by a build of Classlib r386322. 408 classes were found. The list of classes still required are:
java/awt/AWTPermission java/awt/Point java/awt/geom/Point2D java/beans/BeanDescriptor java/beans/BeanInfo java/beans/EventSetDescriptor java/beans/FeatureDescriptor java/beans/IndexedPropertyDescriptor java/beans/IntrospectionException java/beans/Introspector java/beans/MethodDescriptor java/beans/PropertyChangeEvent java/beans/PropertyChangeSupport java/beans/PropertyDescriptor java/beans/PropertyVetoException java/beans/SimpleBeanInfo java/rmi/NotBoundException java/rmi/Remote java/rmi/RemoteException java/util/logging/ConsoleHandler java/util/logging/ErrorManager java/util/logging/Formatter java/util/logging/Handler java/util/logging/Level java/util/logging/LogManager java/util/logging/LogRecord java/util/logging/Logger java/util/logging/LoggingPermission java/util/logging/SimpleFormatter java/util/logging/StreamHandler javax/crypto/SecretKey