My first Java application only works on emulator

Question

I've been programming (just for fun) for many years now, and a couple of days ago I got interested in writing software for my cellphone (a SE k500i). Now I've managed to create my first program. It works great when being run inside an emulator-window but not on my cellphone. I guess it crashes directly because I don't get any error messages or anything.
I've been developing it using netbeans and I'm using a "TableItem" to display searches (my program searches a huge list of swedish words (only the CRC32 of the words are stored in a file called "ord") to see if an inputted word is valid when playing Scrabble). Is it wrong to use the tableItem maybe?
Screenshot: http://home.no/filipsprogram/DUMP/Shot0001.JPG
I have attached the full source code for my program, if someone could take a look at it I would be very greatful:
(oh, one more thing, in netbeans, how do you delete autogenerated code? I added some commands in the "Screen Design"-er and deleted them right away but the code is still there...)
* AlfapetSok.java
* Created on den 29 juni 2006, 10:39
package AlfapetSok;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
import java.io.*;
import org.netbeans.microedition.lcdui.TableModel;
* @author filip ([email protected])
public class AlfapetSok extends MIDlet implements CommandListener, ItemCommandListener {
     * Creates a new instance of AlfapetSok
    public AlfapetSok() {
    private Form mainForm;
    private Command exitCommand;
    private TextField textField1;
    private Command okCommand1;
    private org.netbeans.microedition.lcdui.SimpleTableModel simpleTableModel1;
    private org.netbeans.microedition.lcdui.SimpleTableModel simpleTableModel2;
    private Spacer spacer1;
    private org.netbeans.microedition.lcdui.TableItem tableItem1;
    private Command screenCommand1;
    private Command screenCommand2;
    private int NumWords = 5;
    private String[][] Words = new String[NumWords][2];
    private int NumSearches=0;
    private int polynomial = 0xEDB88320;
    int[] ord = createFromFile("/AlfapetSok/ord");
private int CRC32Value(int i) {
int crc = i;
for (int j = 8; j > 0; j--) {
if ((crc & 1) == 1)
crc = (crc >>> 1) ^ polynomial;
else
crc >>>= 1;
return crc;
public int calculateCRC32(byte[] buffer) {
    int crc=0;
        for (int i = 0; i <  buffer.length; i++) {
            int tmp1 = (crc >>> 8) & 0x00FFFFFF;
            int tmp2 = CRC32Value(((int) crc ^ buffer) & 0xff);
crc = tmp1 ^ tmp2;
return crc;//((crc % 0xFFFFFF) & 0xFFFFFF); //24-bit CRC :-)
public static int[] createFromFile(String aFilename) {       
try {
InputStream is = aFilename.getClass().getResourceAsStream(aFilename);
DataInputStream d = new DataInputStream(is);
int antalord = 89361;
int[] array = new int[antalord];
for(int i = 0; i < antalord; i++){
array[i] = d.readInt();
return array;
} catch (Exception e) {
System.out.println("FEEEEEEL!!!!: "+e.toString());
return null;
public int search(int[] buffer,int target){
int low=0;
int high = buffer.length-1;
int mid;
while (low <= high)
mid= (low + high) / 2;
if (target == buffer[mid])
return mid;
if (target < buffer[mid])
high = mid - 1;
else
low = mid + 1;
return -1;
public org.netbeans.microedition.lcdui.SimpleTableModel getModel(int Num) {
if (simpleTableModel1 == null)
simpleTableModel1 = new org.netbeans.microedition.lcdui.SimpleTableModel();
String[][] WordsTemp = new String[Num][2];
for (int i=0;i < Num;i++)
WordsTemp[i][0] = Words[i][0];
WordsTemp[i][1] = Words[i][1];
simpleTableModel1.setValues(WordsTemp);
simpleTableModel1.setColumnNames(new String[] {"Ord","Finns?"});
return simpleTableModel1;
/** Called by the system to indicate that a command has been invoked on a particular item.
* @param command the Command that ws invoked
* @param item the Item on which the command was invoked
public void commandAction(Command command, Item item) {
// Insert global pre-action code here
if (item == textField1) {
if (command == okCommand1) {
// Do nothing
String s = textField1.getString();
String s2= s.toLowerCase();
int i = calculateCRC32(s2.getBytes());
String t = "ja";
if(-1 == search(ord,i))
t = "nej";
for (i = NumWords-1 ;i > 0;i--)
Words[i][0] = Words[i-1][0];
Words[i][1] = Words[i-1][1];
Words[0][0] = s;
Words[0][1] = t;
if (NumSearches++ >= NumWords)
NumSearches = NumWords;
tableItem1.setModel(getModel(NumSearches));
textField1.setString("");
// Insert global post-action code here
/** This method initializes UI of the application.
private void initialize() {
// Insert pre-init code here
getDisplay().setCurrent(get_mainForm());
// Insert post-init code here
/** Called by the system to indicate that a command has been invoked on a particular displayable.
* @param command the Command that ws invoked
* @param displayable the Displayable on which the command was invoked
public void commandAction(Command command, Displayable displayable) {
// Insert global pre-action code here
if (displayable == mainForm) {
if (command == exitCommand) {
// Insert pre-action code here
exitMIDlet();
// Insert post-action code here
// Insert global post-action code here
* This method should return an instance of the display.
public Display getDisplay() {                        
return Display.getDisplay(this);
* This method should exit the midlet.
public void exitMIDlet() {                        
getDisplay().setCurrent(null);
destroyApp(true);
notifyDestroyed();
/** This method returns instance for mainForm component and should be called instead of accessing mainForm field directly.
* @return Instance for mainForm component
public Form get_mainForm() {
if (mainForm == null) {
// Insert pre-init code here
mainForm = new Form(null, new Item[] {
get_textField1(),
get_spacer1(),
get_tableItem1()
mainForm.addCommand(get_exitCommand());
mainForm.setCommandListener(this);
// Insert post-init code here
return mainForm;
/** This method returns instance for exitCommand component and should be called instead of accessing exitCommand field directly.
* @return Instance for exitCommand component
public Command get_exitCommand() {
if (exitCommand == null) {
// Insert pre-init code here
exitCommand = new Command("Avsluta", Command.EXIT, 1);
// Insert post-init code here
return exitCommand;
/** This method returns instance for textField1 component and should be called instead of accessing textField1 field directly.
* @return Instance for textField1 component
public TextField get_textField1() {
if (textField1 == null) {
// Insert pre-init code here
textField1 = new TextField("Filips AlfapetS\u00F6k", "", 120, TextField.ANY);
textField1.addCommand(get_okCommand1());
textField1.setItemCommandListener(this);
textField1.setDefaultCommand(get_okCommand1());
// Insert post-init code here
return textField1;
/** This method returns instance for okCommand1 component and should be called instead of accessing okCommand1 field directly.
* @return Instance for okCommand1 component
public Command get_okCommand1() {
if (okCommand1 == null) {
// Insert pre-init code here
okCommand1 = new Command("S\u00F6k", Command.OK, 1);
// Insert post-init code here
return okCommand1;
/** This method returns instance for simpleTableModel1 component and should be called instead of accessing simpleTableModel1 field directly.
* @return Instance for simpleTableModel1 component
public org.netbeans.microedition.lcdui.SimpleTableModel get_simpleTableModel1() {
if (simpleTableModel1 == null) {
// Insert pre-ire
simpleTableModel1 = new org.netbeans.microedition.lcdui.SimpleTableModel();
simpleTableModel1.setValues(new String[][] {
new String[] {
new String[] {
null,
new String[] {
null,
null,
new String[] {
null,
null,
new String[] {
null,
null,
new String[] {
null,
null,
simpleTableModel1.setColumnNames(null);
// Insert post-init code here
return simpleTableModel1;
/** This method returns instance for simpleTableModel2 component and should be called instead of accessing simpleTableModel2 field directly.
* @return Instance for simpleTableModel2 component
public org.netbeans.microedition.lcdui.SimpleTableModel get_simpleTableModel2() {
if (simpleTableModel2 == null) {
// Insert pre-init code here
simpleTableModel2 = new org.netbeans.microedition.lcdui.SimpleTableModel();
simpleTableModel2.setValues(new String[][] {
new String[] {
simpleTableModel2.setColumnNames(new String[] {
"Ord",
"Finns?",
// Insert post-init code here
return simpleTableModel2;
/** This method returns instance for spacer1 component and should be called instead of accessing spacer1 field directly.
* @return Instance for spacer1 component
public Spacer get_spacer1() {
if (spacer1 == null) {
// Insert pre-init code here
spacer1 = new Spacer(1000, 1);
// Insert post-init code here
return spacer1;
/** This method returns instance for tableItem1 component and should be called instead of accessing tableItem1 field directly.
* @return Instance for tableItem1 component
public org.netbeans.microedition.lcdui.TableItem get_tableItem1() {
if (tableItem1 == null) {
// Insert pre-init code here
tableItem1 = new org.netbeans.microedition.lcdui.TableItem(getDisplay(), "S\u00F6kningar", get_simpleTableModel2());
// Insert post-init code here
return tableItem1;
/** This method returns instance for screenCommand1 component and should be called instead of accessing screenCommand1 field directly.
* @return Instance for screenCommand1 component
public Command get_screenCommand1() {
if (screenCommand1 == null) {
// Insert pre-init code here
screenCommand1 = new Command("Screen", Command.SCREEN, 1);
// Insert post-init code here
return screenCommand1;
/** This method returns instance for screenCommand2 component and should be called instead of accessing screenCommand2 field directly.
* @return Instance for screenCommand2 component
public Command get_screenCommand2() {
if (screenCommand2 == null) {
// Insert pre-init code here
screenCommand2 = new Command("Screen", Command.SCREEN, 1);
// Insert post-init code here
return screenCommand2;
public void startApp() {
initialize();
public void pauseApp() {
public void destroyApp(boolean unconditional) {

Answer 1

I still haven't heard anything from the guy at Sun, so today when I got an infrared device I did some debugging on my own directly on the phone. I managed to trace the error (by alot of System.out.println("I'm here!")) to TableItem.java in the function setModel.
     public void setModel(TableModel model) throws IllegalArgumentException {
             if (this.model != null) {
               this.model.removeTableModelListener(this);
             if (model == null) throw new IllegalArgumentException("model parameter cannot be null");
          if (model != null) {
               if (model.getRowCount() < 0) throw new IllegalArgumentException("model cannot have negative number of rows");
               if (model.getColumnCount() < 0) throw new IllegalArgumentException("model cannot have negative number of cols");
               model.addTableModelListener(this);
          this.model = model;
                recomputeModelValues();
                invalidate();       
     }The last line there, Invalidate();, is causing the crash; by commenting that line out the program will run :-) Unfortunately the tableItem will not work correctly without it. I'm not skilled enough to continue debugging, maybe someone else can take over from here?