import?java.awt.*;
import?java.awt.event.*;
import?java.net.*;
import?javax.swing.*;

public?class?UDPServerDemo?extends?Jframe{	
	int?port=2345;	//端口號
	
	public?UDPServerDemo（）{
		try{
			byte[]?buffer=new?byte[256];?//緩沖區數組
			DatagramSocket?socket=new?DatagramSocket（port）;	?//實例化數據報Socket
			DatagramPacket?packet;?
			System.out.println（“Server?start...“）;?//輸出運行信息
			
			while?（true）{
				packet=new?DatagramPacket（bufferbuffer.length）;?//實例化數據報
				socket.receive（packet）;	?//接受請求							
				InetAddress?target=packet.getAddress（）;?
				System.out.println（“Received?from“+target）;?//輸出請求地址
				int?port=packet.getPort（）;?//得到接收端口
				byte[]?message=“This?is?serverWho?are?you?“.getBytes（）;?//服務器返回信息
				packet=new?DatagramPacket（messagemessage.lengthtargetport）;?//實例化數據報
				socket.send（packet）;?//發送數據報
			}			
		}
		catch?（Exception?ex）{
			ex.printStackTrace（）;?//輸出出錯信息
		}
	}
	
	public?static?void?main（String[]?args）{
		new?UDPServerDemo（）;
	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1298??2004-07-21?18:19??UDPServerDemo.class
?????文件????????1066??2004-05-24?16:50??UDPServerDemo.java