* stream handlers.  This can be called once per JVM instance.
     *
     * @param factory The URL stream handler factory.
     */
    public static void setURLStreamHandlerFactory(
            URLStreamHandlerFactory factory) {
        synchronized (PROTOCOL_HANDLERS) {
            if (Handler.factory != null) {
                throw new IllegalStateException(

     * stream handlers. This can be called once per JVM instance.
     *
     * @param factory
     *            The URL stream handler factory.
     */
    public static void setURLStreamHandlerFactory ( URLStreamHandlerFactory factory ) {
        synchronized ( PROTOCOL_HANDLERS ) {
            if ( Handler.factory != null ) {
                throw new IllegalStateException("URLStreamHandlerFactory already set.");