import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class J2MEDisplayAlert extends MIDlet implements CommandListener {
private Display display;
private Alert alert;
private Form form;
private Command exit;
private boolean exitFlag;
public J2MEDisplayAlert() {
exitFlag = false;
display = Display.getDisplay(this);
exit = new Command("Exit", Command.SCREEN, 1);
form = new Form("Throw Exception");
form.addCommand(exit);
form.setCommandListener(this);
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) throws MIDletStateChangeException {
if (unconditional == false) {
throw new MIDletStateChangeException();
}
}
public void commandAction(Command command, Displayable displayable) {
if (command == exit) {
try {
if (exitFlag == false) {
alert = new Alert("Busy", "Please try again.", null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert, form);
destroyApp(false);
} else {
destroyApp(true);
notifyDestroyed();
}
} catch (MIDletStateChangeException exception) {
exitFlag = true;
}
}
}
}