一个网络聊天程序，要求使用UDP协议。聊天程序必须具备的功能是：

（1）　　聊天程序不需要经过服务器，既能发送聊天内容又能接收聊天内容。

（2）　　通过点击“发送”按钮可以把聊天的一句话的内容附加一些特征信息发送到目的地。一般要把特征信息（本机IP，本人名字，对方密码）用特殊格式与聊天内容分隔开，发送至目的地。

（3）　　通过一个“接收”线程接收目的地为本机并且端口号为设定端口号的信息。通过对信息解析，可以解析出对方发送时的密码，如果密码与本人设定的密码不一致，则认为是误发的信息，不接收也不显示；如果信息中的密码与本人设定的密码一致，则认为是发向自己的信息。要解析出发信人的IP和姓名以及内容，并且把内容显示出来-A network chat program, require the use of UDP protocol. Chat program must have features are:

(1) chat program does not require the server, both can send chat to receive chats.

(2) by clicking the "Send" button to chat with some of the words the contents of the additional features of the information sent to the destination. General characteristics of the information necessary to (local IP, I name, the other password) chats with a special format and separated, sent to the destination.

(3) by a "receive" thread receives the destination-based machine and port number to set the port number. Through information analysis, you can parse out each other when sending the password if the password is inconsistent with the password I set, then send the information that is false, does not receive nor display　if the information in the password and the password I set the same , is considered to be sent to their own information. To parse out the sender s IP and name and content, and the content