لتشغيل صوت تحذيري بسيط

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

public class SoundAlert extends MIDlet implements ItemStateListener, CommandListener

{

private Display display; // Reference to display object

private Form fmMain; // Main form

private Command cmExit; // Command to exit the MIDlet

private ChoiceGroup cgSound; // Choice group

public SoundAlert()

{

display = Display.getDisplay(this);

// Create an exclusive (radio) choice group

cgSound = new ChoiceGroup("Choose a sound", Choice.EXCLUSIVE);

// Append options, with no associated images

cgSound.append("Info", null);

cgSound.append("Confirmation", null);

cgSound.append("Warning", null);

cgSound.append("Alarm", null);

cgSound.append("Error", null);

cmExit = new Command("Exit", Command.EXIT, 1);

// Create Form, add components, listen for events

fmMain = new Form("");

fmMain.append(cgSound);

fmMain.addCommand(cmExit);

fmMain.setCommandListener(this);

fmMain.setItemStateListener(this);

}

public void startApp()

{

display.setCurrent(fmMain);

}

public void pauseApp()

{ }

public void destroyApp(boolean unconditional)

{ }

public void commandAction(Command c, Displayable s)

{

if (c == cmExit)

{

destroyApp(false);

notifyDestroyed();

}

}

public void itemStateChanged(Item item)

{

switch (cgSound.getSelectedIndex())

{

case 0:

AlertType.INFO.playSound(display);

break;

case 1:

AlertType.CONFIRMATION.playSound(display);

break;

case 2:

AlertType.WARNING.playSound(display);

break;

case 3:

AlertType.ALARM.playSound(display);

break;

case 4:

AlertType.ERROR.playSound(display);

break;

}

}

}