Problem in thread creation

Question

Hello Frnds,
i am learning j2me..i am facing some problem in simple thread initilization..
the code is
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.io.*;
class Process implements Runnable
private FileConnection MIDlet1;
private Display display;
public Process()
MIDlet1=MIDlet2;
public void run()
try
transmit ();
catch (Exception error)
System.err.println(error.toString());
public void start()
Thread thread = new Thread(this);
try
thread.start();
catch(Exception e)
// System.out.println(e);
private void transmit() throws IOException
try
OutputConnection connection = (OutputConnection)Connector.open("file://c:/myfile.txt;append=true", Connector.WRITE );
OutputStream out = connection.openOutputStream();
PrintStream output = new PrintStream( out );
output.println( "This is a test." );
out.close();
connection.close();
catch( ConnectionNotFoundException error )
catch( IOException error )
Alert alert = new Alert("Error", error.toString(), null, null);
alert.setTimeout(Alert.FOREVER);
alert.setType(AlertType.ERROR);
display.setCurrent(alert);
catch(Exception error)
public class FileConnection extends MIDlet implements CommandListener
private Command exit, start;
private Display display;
private Form form;
public FileConnection ()
display = Display.getDisplay(this);
exit = new Command("Exit", Command.EXIT, 1);
start = new Command("Start", Command.EXIT, 1);
form = new Form("Write To File");
form.addCommand(exit);
form.addCommand(start);
form.setCommandListener(this);
public void startApp() throws MIDletStateChangeException
display.setCurrent(form);
public void pauseApp()
public void destroyApp(boolean unconditional)
public void commandAction(Command command, Displayable displayable)
if (command == exit)
destroyApp(false);
notifyDestroyed();
else if (command == start)
process.start();
}//middlet ends here
this code is givin null pinter exception and it does not initialize proocess class..vat is error..plz let me know

Answer 1

oh ..there was some problem..sending it again
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.io.*;
public class FileConnection extends MIDlet implements CommandListener
private Command exit, start;
private Display display;
private Form form;
public FileConnection ()
display = Display.getDisplay(this);
exit = new Command("Exit", Command.EXIT, 1);
start = new Command("Start", Command.EXIT, 1);
form = new Form("Write To File");
form.addCommand(exit);
form.addCommand(start);
form.setCommandListener(this);
public void startApp() throws MIDletStateChangeException
display.setCurrent(form);
public void pauseApp()
public void destroyApp(boolean unconditional)
public void commandAction(Command command, Displayable displayable)
if (command == exit)
destroyApp(false);
notifyDestroyed();
else if (command == start)
Process process=new Process(this);
process.start();
}//middlet ends here
class Process implements Runnable
private FileConnection MIDlet;
private Display display;
public Process(FileConnection MIDlet)
this.MIDlet=MIDlet;
public void run()
try
OutputConnection connection = (OutputConnection)
Connector.open("file://D:/Programs/Hello.txt", Connector.WRITE );
OutputStream out = connection.openOutputStream();
PrintStream output = new PrintStream( out );
output.println( "This is a test." );
out.close();
connection.close();
Alert alert = new Alert("Completed", "Data Written", null, null);
alert.setTimeout(Alert.FOREVER);
alert.setType(AlertType.ERROR);
display.setCurrent(alert);
catch( ConnectionNotFoundException error )
Alert alert = new Alert("Error", "Cannot access file.", null, null);
alert.setTimeout(Alert.FOREVER);
alert.setType(AlertType.ERROR);
display.setCurrent(alert);
catch( IOException error )
Alert alert = new Alert("Error", error.toString(), null, null);
alert.setTimeout(Alert.FOREVER);
alert.setType(AlertType.ERROR);
display.setCurrent(alert);
catch(Exception e)
System.out.println(e);
public void start()
Thread thread = new Thread(this);
try
thread.start();
catch(Exception e)
System.out.println(e);
}