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

public?class?UDPClientDemo?extends?Jframe{
	String?host=“l(fā)ocalhost“;?//服務(wù)器地址
	int?port=2345;?//端口號(hào)
	
	public?UDPClientDemo（）{
		try{		
			DatagramSocket?socket=new?DatagramSocket（）;?//實(shí)例化一個(gè)數(shù)據(jù)報(bào)Socket
			InetAddress?address=InetAddress.getByName（host）;??//服務(wù)器地址
			byte[]?buffer=new?byte[256];?//緩沖區(qū)
			DatagramPacket?packet=new?DatagramPacket（bufferbuffer.lengthaddressport）;?//實(shí)例化一個(gè)數(shù)據(jù)報(bào)
			socket.send（packet）;?//發(fā)送報(bào)文
			
			packet=new?DatagramPacket（bufferbuffer.length）;?
			socket.receive（packet）;?//接受回應(yīng)
			
			String?message=new?String（packet.getData（））;?//得到報(bào)文信息
			System.out.println（“Received?from:?“+packet.getAddress（））;?//顯示信息源地址
			System.out.println（message）;?//顯示服務(wù)器返回信息
			
			socket.close（）;?//關(guān)閉端口
		}
		catch?（Exception?ex）{
			ex.printStackTrace（）;?//輸出出錯(cuò)信息
		}		
	}
	
	public?static?void?main（String[]?args）{
		new?UDPClientDemo（）;
	}
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????1420??2004-07-21?18:19??UDPClientDemo.class
?????文件????????1031??2004-06-01?05:18??UDPClientDemo.java