package udptest;import java.io.*;import java.net.*;/** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2003</p> * <p>Company: </p> * @author not attributable * @version 1.0 */public class UDPServerService {  public UDPServerService() {  }  public static void main(String[] args) {    if(args.length<1)                {                        System.out.println("請輸入用于本地 mail 服務的端口號");                        System.exit(0);                }                UDPServerThread MyUDPServer = new UDPServerThread(Integer.parseInt(args[0]));                MyUDPServer.start();  }}