Thread Example in J2ME

/*
J2ME: The Complete Reference

James Keogh

Publisher: McGraw-Hill

ISBN 0072227109

*/
// jad file (Please verify the jar size first)
/*
MIDlet-Name: BackgroundProcessing
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: BackgroundProcessing.jar
MIDlet-1: BackgroundProcessing, , BackgroundProcessing
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100

*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;
import java.io.*;

public class BackgroundProcessing extends MIDlet
implements CommandListener
{
private Display display;
private Form form;
private Command exit;
private Command start;
public BackgroundProcessing()
{
display = Display.getDisplay(this);
form = new Form("Background Processing");
exit = new Command("Exit", Command.EXIT, 1);
start = new Command("Start", Command.SCREEN, 2);
form.addCommand(exit);
form.addCommand(start );
form.setCommandListener(this);
}
public void startApp()
{
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();
//Do foreground processing here
}
}
}
class Process implements Runnable
{
private BackgroundProcessing MIDlet;
public Process(BackgroundProcessing MIDlet)
{
this.MIDlet = MIDlet;
}
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 error)
{
}
}
private void transmit() throws IOException
{
//Place code here to receive or send transmission.
}
}