251      * IOException} and cause {@link ShutdownChannelGroupException}.

   251      * IOException} and cause {@link ShutdownChannelGroupException}.

   252      *

   252      *

   253      * <p> To allow for concurrent handling of new connections, the completion

   253      * <p> To allow for concurrent handling of new connections, the completion

   254      * handler is not invoked directly by the initiating thread when a new

   254      * handler is not invoked directly by the initiating thread when a new

   255      * connection is accepted immediately (see <a

   255      * connection is accepted immediately (see <a

   257      *

   257      *

   258      * <p> If a security manager has been installed then it verifies that the

   258      * <p> If a security manager has been installed then it verifies that the

   259      * address and port number of the connection's remote endpoint are permitted

   259      * address and port number of the connection's remote endpoint are permitted

   260      * by the security manager's {@link SecurityManager#checkAccept checkAccept}

   260      * by the security manager's {@link SecurityManager#checkAccept checkAccept}

   261      * method. The permission check is performed with privileges that are restricted

   261      * method. The permission check is performed with privileges that are restricted