取得Socket資訊

在命令列輸入一串主機名稱，並嘗試對各個主機開啟一個Socket
印出遠端主機、遠端通訊埠、本地位址及本地通訊埠

import java.net.*;
import java.io.*;

public class SocketInfo{
    public static void main(String[] args){
        for(int i = 0; i < args.length; i++){
            try{
                Socket s = new Socket(args[i], 80);
                System.out.println("Connected to " + s.getInetAddress()
                    + "on port " + s.getPort() + " from port "
                    + s.getLocalPort() + " of "
                    + s.getLocalAddress());
            }
            catch(UnknownHostException ex){
                System.err.println("I can't find " + args[i]);
            }
            catch(SocketException ex){
                System.err.println("Could not connect to " + args[i]);
            }
            catch(IOException ex){
                System.err.println(ex);
            }
        }//for end
    }//main end
}//SocketInfo end

參考資料:Java網路程式設計 第三版(歐萊禮出版) 第九章範例