Alarm alert, confirmation alert, error alert, info alert, warning alert : Alert « J2ME « Java Tutorial

1. Java Tutorial
2. J2ME
3. Alert

import java.io.IOException;

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.Image;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;

public class FewAlertsMIDlet extends MIDlet implements CommandListener {

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

  private Command alarmCommand = new Command("alarm", Command.SCREEN, 2);

  private Command confirmCommand= new Command("confirm", Command.SCREEN, 2);

  private Command errorCommand = new Command("error", Command.SCREEN, 2);

  private Command infoCommand = new Command("info", Command.SCREEN, 2);

  private Command warningCommand = new Command("warning", Command.SCREEN, 2);

  private Alert alarmAlert = new Alert("alarm",null,null,  AlertType.ALARM);

  private Alert confirmAlert = new Alert("confirm", null,null, AlertType.CONFIRMATION);

  private Alert errorAlert = new Alert("error", null, null,AlertType.ERROR);

//  private Alert infoAlert = new Alert("info", null,infoImage, AlertType.INFO);

  private Alert warningAlert = new Alert("warning",null, null, AlertType.WARNING);

  private Display display = Display.getDisplay(this);

  public FewAlertsMIDlet() {
  }

  public void startApp() {
    TextBox main = new TextBox("","",26,TextField.ANY);
    Image infoImage = null;
    try {
      infoImage = Image.createImage("/a.png");
    } catch (IOException e) {
    }

    alarmAlert.setTimeout(Alert.FOREVER);
    confirmAlert.setTimeout(3000);
    errorAlert.setTimeout(3000);
  //  infoAlert.setTimeout(3000);
    warningAlert.setTimeout(3000);

    main.addCommand(exitCommand);
    main.addCommand(alarmCommand);
    main.addCommand(confirmCommand);
    main.addCommand(errorCommand);
    main.addCommand(infoCommand);
    main.addCommand(warningCommand);

    main.setCommandListener(this);
    display.setCurrent(main);
  }

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

  public void commandAction(Command c, Displayable s) {
    if (c == exitCommand) {
      destroyApp(false);
      notifyDestroyed();
    }
    if (c == alarmCommand) {
      display.setCurrent(alarmAlert);
    }
    if (c == confirmCommand) {
      display.setCurrent(confirmAlert);
    }
    if (c == errorCommand) {
      display.setCurrent(errorAlert);
    }
 //   if (c == infoCommand) {
   //   display.setCurrent(infoAlert);
   // }
    if (c == warningCommand) {
      display.setCurrent(warningAlert);
    }
  }
}

31.14.Alert
	31.14.1.	Two alerts
	31.14.2.	Alarm alert, confirmation alert, error alert, info alert, warning alert
	31.14.3.	Set alert time out