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Application quit unexpectedly

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Black Sparrow

Joined: 24 Aug 2013
Posts: 1

PostPosted: Sat Aug 24, 2013 5:17 am    Post subject: Application quit unexpectedly Reply with quote

Hi, I'm a newbie here and a beginner in Java ME. Could anyone here tell me what is the problem? When I run my program, the a message box is displayed saying ("The following application has unexpectedly quit").

package Q2;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.List;
import javax.microedition.midlet.*;

* @author sean
public class Lab4Q2 extends MIDlet implements CommandListener{

private Display disp = Display.getDisplay(this);
private List converter;

public void startApp() {

public void pauseApp() {

public void destroyApp(boolean unconditional) {

public Displayable generateList(){
converter = new List ("Converter", List.IMPLICIT, null, null);
converter.append("Mass and Weight", null);
converter.append("Distance and Length", null);
converter.append("Capacity and Volume", null);
converter.append("Area", null);
converter.append("Speed", null);
converter.append("Temperature", null);

Command cmdExit = new Command("Exit", Command.EXIT, 1);
Command cmdScreen = new Command("Option", Command.SCREEN, 1);
return converter;


public void commandAction(Command c, Displayable d) {
if(c == List.SELECT_COMMAND){
switch (converter.getSelectedIndex()) {
case 0:
System.out.println("You selected Mass and Weight function");
case 1:
System.out.println("You selected Distance and Length function");
case 2:
System.out.println("You selected Capacity and Volume function");
case 3:
System.out.println("You selected Area function");
case 4:
System.out.println("You selected Speed function");
case 5:
System.out.println("You selected Temperature function");

// case Command.EXIT:
// destroyApp(true);
// notifyDestroyed();


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