mail\message.txt server\EchoServer.java dinetAddress\InetAddressTest.java Iinterruptible\InterruptibleSocketTest.java mail\MailTest.java post\PostTest.java socket\SocketTest.java threaded\ThreadedEchoServer.java urlConnection\URLConnectionTest.java mail\mail.properties post\post.properties dinetAddress Iinterruptible mail post server socket threaded urlConnection