A、<p><span style="font-size:13px;font-family: 宋体">Applet</span></p>
B、<p><span style="font-size:13px;font-family: 宋体">Datagramsocket</span></p>
C、<p><span style="font-size:13px;font-family: 宋体">InetAddress</span></p>
D、<p><span style="font-size:13px;font-family: 宋体">AppletContext</span></p>