D3D DirectX (!! 3D GRAPHIC !!)

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import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class ftp extends Frame {
  public static String hostAddress = "";
  public static int portNumber = 0, maxClients = 0;
  public static Vector sockets = null;
  public static ftp tp;
  public static String fileName = "",path = "";
  public static int check = 0;
  public static Socket connection = null;
  public static ObjectOutputStream out = null;
  public static ObjectInputStream in = null;
  public static void main (String [] args) throws IOException {
   BufferedReader stdin = new BufferedReader
     (new InputStreamReader (System.in));
   System.out.println("1. Connect to host");
   System.out.println("2. Wait for connections");
   System.out.println();
   System.out.print("Please make a choice: ");
   System.out.flush();
   int choice = Integer.parseInt(stdin.readLine());
   if (choice == 1) {
     System.out.print("Please type in the host address: ");
     System.out.flush();
     hostAddress = stdin.readLine();
     System.out.print("Please type in the host port number: ");
     System.out.flush();
     portNumber = Integer.parseInt(stdin.readLine());
   }
   if (choice == 2) {
     System.out.print("Give the port number to listen for requests: ");
     System.out.flush();
     portNumber = Integer.parseInt(stdin.readLine());
     System.out.print("Give the maximum number of clients for this server: ");
     System.out.flush();
     maxClients = Integer.parseInt(stdin.readLine());
   }
   tp = new ftp(choice);
  }
  public Label l;
  public TextField tf;
  public Button browse;
  public Button send;
  public Button reset;
  public ftp (int c) {
   setTitle("Ezad's File Transfer Protocol");
   setSize(300 , 350);
   setLayout(null);
   addWindowListener(new WindowAdapter () { public void windowClosing (WindowEvent e) { System.exit(0); } } );
   l = new Label("File:");
   add(l);
   l.setBounds(15,87,50,20);
   tf = new TextField("");
   add(tf);
   tf.setBounds(13,114,200,20);
   browse = new Button("Browse");
   browse.addActionListener(new buttonListener());
   add(browse);
   browse.setBounds(223,113,50,20);
   send = new Button("Send");
   send.addActionListener(new buttonListener());
   add(send);
   send.setBounds(64,168,50,20);
   reset = new Button("Reset");
   reset.addActionListener(new buttonListener());
   add(reset);
   reset.setBounds(120,168,50,20);
   show();
   if (c == 1) {
     check = 10;
     try {
      connection = new Socket (hostAddress,portNumber);
      out = new ObjectOutputStream(connection.getOutputStream());
      out.flush();
      in = new ObjectInputStream(connection.getInputStream());
      int flag = 0;
      while (true) {
        Object recieved = in.readObject();
        switch (flag) {
         case 0:
           if (recieved.equals("sot")) {
            flag++;
           }
           break;
         case 1:
           fileName = (String) recieved;
           int option = JOptionPane.showConfirmDialog(this,connection.getInetAddress().getHostName()+" is sending you "+fileName+"!\nDo you want to recieve it?","Recieve Confirm",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);
           if (option == JOptionPane.YES_OPTION) {
            flag++;
           } else {
            flag = 0;
           }
           break;
         case 2:
           byte[] b = (byte[])recieved;
           FileOutputStream ff = new FileOutputStream(fileName);
           //ObjectOutputStream o = new ObjectOutputStream(ff);
           //o.writeObject(b);
           //o.flush();
           //o.close();
           ff.write(b);
           flag = 0;
           //out.writeObject("rcn");
           JOptionPane.showMessageDialog(this,"File Recieved!","Confirmation",JOptionPane.INFORMATION_MESSAGE);
           break;
        }
        Thread.yield();
      }
     } catch (Exception e) {System.out.println(e);}
   }
   if (c == 2) {
     sockets = new Vector();
     check = 5;
     try {
      ServerSocket connect = new ServerSocket(portNumber,maxClients);
      while (true) {
        sockets.addElement(new ThreadedSocket(connect.accept()));
        Thread.yield();
      }
     } catch (IOException ioe) {System.out.println(ioe);}
   }  
  }
  public static String showDialog () {
   FileDialog fd = new FileDialog(new Frame(),"Select File...",FileDialog.LOAD);
   fd.show();
   return fd.getDirectory()+fd.getFile();
  }
  private class buttonListener implements ActionListener {
   public void actionPerformed (ActionEvent e) {
     byte[] array = null;
     if (e.getSource() == browse) {
      path = showDialog();
      tf.setText(path);
      int index = path.lastIndexOf("\\");
      fileName = path.substring(index+1);
     }
     if (e.getSource() == send) {
      //if (fileName != null && !fileName.equals("")) {
      try {
        FileInputStream f = new FileInputStream (path);
        int size = f.available();
        array = new byte[size];
        f.read(array,0,size);
        if (check == 5) {
         for (int i=0;i<sockets.size();i++) {
           ThreadedSocket temp = (ThreadedSocket)sockets.elementAt(i);
           temp.out.writeObject("sot");
           temp.out.flush();
           temp.out.writeObject(fileName);
           temp.out.flush();
           temp.out.writeObject(array);
           temp.out.flush();
         }
        }
        if (check == 10) {
         out.writeObject("sot");
         out.flush();
         out.writeObject(fileName);
         out.flush();
         out.writeObject(array);
         out.flush();
        }  
        JOptionPane.showMessageDialog(null,"File Sent!","Confirmation",JOptionPane.INFORMATION_MESSAGE);
      } catch (Exception ex) {}
      //}
     }
     if (e.getSource() == reset) {
      tf.setText("");
     }
   }
  }
}
class ThreadedSocket extends Thread {
  public Socket socket;
  public ObjectInputStream in;
  public ObjectOutputStream out;
  public ThreadedSocket (Socket s) {
   socket = s;
   try {
     out = new ObjectOutputStream(socket.getOutputStream());
     out.flush();
     in = new ObjectInputStream(socket.getInputStream());
   } catch (Exception e) {System.out.println(e);}
   start();
  }
  public void run () {
   try {
     int flag = 0;
     String fileName = "";
     while (true) {
      Object recieved = in.readObject();
      switch (flag) {
        case 0:
         if (recieved.equals("sot")) {
           flag++;
         }
         break;
        case 1:
         fileName = (String) recieved;
         int option = JOptionPane.showConfirmDialog(null,socket.getInetAddress().getHostName()+" is sending you "+fileName+"!\nDo you want to recieve it?","Recieve Confirm",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);
         if (option == JOptionPane.YES_OPTION) {
           flag++;
         } else {
           flag = 0;
         }
         break;
        case 2:
         byte[] b = (byte[])recieved;
         FileOutputStream ff = new FileOutputStream(fileName);
         //ObjectOutputStream o = new ObjectOutputStream(ff);
         //o.writeObject(b);
         //o.flush();
         ff.write(b);
         flag = 0;
         //out.writeObject("rcn");
         JOptionPane.showMessageDialog(null,"File Recieved!","Confirmation",JOptionPane.INFORMATION_MESSAGE);
         break;
      }
      Thread.yield();
     }
   } catch (Exception e) {System.out.println(e);}
  }
}

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