网络编程

1.Java获取本机ip地址

           throws UnknownHostException //抛出异常

   InetAddress host = InetAddress.getLocalHost();//

   String ip =host.getHostAddress();//

2.使用Java执行ping命令

 Process p = Runtime.getRuntime().exec("ping " + "192.168.2.106");

3.使用socket套接字建立链接

服务器端：

 ServerSocket ss = new ServerSocet(port);

 Socket s = ss.accept(); 

  s.close();

  ss.close();

客户端：

  try{

       Socket s = new Socket(ip,port);

      s.cloce();

    }catch (UnknownHostException e) {

        e.printStackTrace();

    }

4.同时收发消息和有图形界面的聊天程序