import java.io.BufferedInputStream;
import java.net.*;
import java.io.*;
import java.awt.event.*;
import javax.swing.*;

/**
 *
 * @author Administrator
 */
public class ftpclient extends JFrame implements ActionListener{
    
    /** Creates a new instance of ftp */
    Socket ctrlSocket;
    public PrintWriter ctrlOutput;
    public BufferedReader ctrlInput;
    
    final int CTRLPORT = 21;
    
    public ftpclient() {
    }
    
  // openConnection方法
 //由地址和端口號構(gòu)造Socket，形成控制用的流
 public void openConnection(String host)
  throws IOException,UnknownHostException
 {
  ctrlSocket = new Socket(host, CTRLPORT);
  ctrlOutput = new PrintWriter(ctrlSocket.getOutputStream());
  ctrlInput= new BufferedReader(new InputStreamReader(ctrlSocket.getInputStream()));
 }
 
 
 public void actionPerformed(ActionEvent e)
 {
 	   System.out.println("Evnt has occured.");
 	  }
 	  
 	  
 public static void main(String [] args)
 {
     ftpclient frame = new ftpclient();
     System.out.println("Hello,java!");     
 }
}