Simple Alert with Image and Default Warning Sound

FirstAlert.java

import javax.microedition.midlet.*; import javax.microedition.lcdui.*; public class FirstAlert extends MIDlet implements CommandListener{  Display display;  List list;  Image img;  Alert alAl, alCo, alEr, alIn, alWa;  Command cmExit;  public FirstAlert() {   display = Display.getDisplay(this);   try {   img = Image.createImage("/img.png");   } catch (java.io.IOException e) {   }   cmExit = new Command("Exit", Command.EXIT, 1);   list = new List("First Alert", List.IMPLICIT);   list.append("ALARM", img);   list.append("CONFIRMATION", img);   list.append("ERROR", img);   list.append("INFO", img);   list.append("WARNING", img);   list.addCommand(cmExit);   list.setCommandListener(this);   display.setCurrent(list);   alAl = new Alert("ALARM", "Alert ALARM", null, AlertType.ALARM);   alAl.setTimeout(Alert.FOREVER);   alCo = new Alert("CONFIRMATION", "Alert CONFIRMATION", null, AlertType.CONFIRMATION);   alCo.setTimeout(Alert.FOREVER);   alEr = new Alert("ERROR", "Alert ERROR", null, AlertType.ERROR);   alEr.setTimeout(Alert.FOREVER);   alIn = new Alert("INFO", "Alert INFO", null, AlertType.INFO);   alIn.setTimeout(Alert.FOREVER);   alWa = new Alert("WARNING", "Alert WARNING", null, AlertType.WARNING);   alWa.setTimeout(Alert.FOREVER);  }  public void startApp() {  }  public void pauseApp() {  }  public void destroyApp(boolean unconditional) {  }  public void commandAction(Command c, Displayable s){   if (c == List.SELECT_COMMAND){   switch (list.getSelectedIndex()){   case 0:   display.setCurrent(alAl);   break;   case 1:   display.setCurrent(alCo, list);   break;   case 2:   display.setCurrent(alEr);   break;   case 3:   display.setCurrent(alIn, list);   break;   case 4:   display.setCurrent(alWa);   break;   }   }else if(c == cmExit){   exitMIDlet();   }  }  public void exitMIDlet() {   destroyApp(false);   notifyDestroyed();  } };

This project requires an image with the name "img.png" with size 15 x 15 pixels