Voice recording in a website

java.lang.IllegalArgumentException: could not write audio file: file type not supported: null
at javax.sound.sampled.AudioSystem.write(AudioSystem.java:1363)
at pp.run(pp.java:30)

import java.io.*;
import javax.sound.sampled.*;
public class pp extends Thread
{
TargetDataLine tdl;
AudioFileFormat.Type afft;
AudioInputStream ais;
File f1;
public pp(TargetDataLine l,AudioFileFormat.Type t,File f2)
{
tdl=l;
ais=new AudioInputStream(tdl);
afft=t;
f1=f2;
}
public void start()
{
tdl.start();
super.start();
}
public void sr()
{
tdl.stop();
tdl.close();
}
public void run()
{
try
{
AudioSystem.write(ais,afft,f1);
}
catch(Exception e)
{
e.printStackTrace();
System.out.println("Exception caught ");
}
}
public static void main(String args[])
{
String s=args[0];
File f=new File(s);
AudioFormat ff=new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,44100.0F, 16, 2, 4, 44100.0F, false);
DataLine.Info inf=new DataLine.Info(TargetDataLine.class,ff);
TargetDataLine td=null;
try
{
td=(TargetDataLine)AudioSystem.getLine(inf);
td.open(ff);
}
catch(Exception e)
{
//e.printStackTrace();
System.out.println("Exception caught ");
}
AudioFileFormat.Type t5=AudioFileFormat.Type.AIFC;
pp p=new pp(td,t5,f);
System.out.println("enter to start recording");
try
{
System.in.read();
}
catch(Exception e)
{
System.out.println("exception caught ");
}
p.start();
System.out.println("enter to stop recording");
try
{
System.in.read();
}
catch(Exception e)
{
System.out.println("exception caught ");
}
p.sr();
System.out.println("recording stoped");
}
}

import java.awt.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
import java.awt.event.*;
/*<Applet code="sas" height=400 width=800></applet>*/
public class sas extends JApplet implements ActionListener
{
JTextArea t;
JButton b;
public void init()
{
t=new JTextArea(10,20);
b=new JButton("open");
setLayout(new FlowLayout());
add(t);
b.addActionListener(this);
add(b);
}
public void actionPerformed(ActionEvent e)
{
byte b[]=new byte[60];
try
{
Socket s=new Socket("127.0.0.1",4444);
InputStream bis=s.getInputStream();
BufferedInputStream bi=new BufferedInputStream(bis);
bis.read(b);
String str=new String(b);
t.setText(str);
}
catch(Exception ee)
{
ee.printStackTrace();
System.out.println("exception caught ");
}
}
}

import java.awt.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
import java.applet.*;
import java.awt.event.*;
/*<Applet code="xx" height=400 width=400></applet>*/
public class xx extends JApplet implements ActionListener
{
JTextArea t;
JButton b;
public void init()
{
t=new JTextArea(10,20);
b=new JButton("submit");
setLayout(new FlowLayout());
add(t);
b.addActionListener(this);
add(b);
}
public void actionPerformed(ActionEvent e)
{
byte b[]=new byte[60];
String str;
byte b1[]=new byte[60];
try
{
ServerSocket s=new ServerSocket(4444);
Socket s1=s.accept();
str=t.getText();
b1=str.getBytes();
ByteArrayInputStream bai=new ByteArrayInputStream(b1);
BufferedInputStream bis=new BufferedInputStream(bai);
bis.read(b);
OutputStream os=s1.getOutputStream();
os.write(b);
//System.out.println(t.getText());
}
catch(Exception ee)
{
System.out.println("Exception caught ");
}
}
}