High-Level Display Screens : Alert : Alert « J2ME « Java

1. Java
2. J2ME
3. Alert

High-Level Display Screens : Alert

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

*/
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 DisplayAlert extends MIDlet implements CommandListener {
  private Display display;

  private Alert alert;

  private Form form = new Form("Throw Exception");

  private Command exit = new Command("Exit", Command.SCREEN, 1);

  private boolean exitFlag = false;

  public DisplayAlert() {
    display = Display.getDisplay(this);
    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 (Exception exception) {
        exitFlag = true;
      }
    }
  }
}


           
       

Related examples in the same category

1.	An example MIDlet with simple Alert UI component containing an Image.
2.	Animated Timer
3.	Two Alerts
4.	Login Midlet
5.	Multi Alert
6.	Modal Alert