Displaying a quiz in midlet

hello everyone,
i am new to j2me, can anyone help how to develop a quiz in a j2me midlet. as i am unable to print not more than one question using forms.
thanks in advance
regards
pallavi

public class CheckBoxExample extends MIDlet implements CommandListener {
     private Display display;
     private Form form1,form2;
     private Command exit, choose;
     private ChoiceGroup technology,language;
     private int index1,index2;
     public CheckBoxExample() {
          form1 = new Form("Technologies");
                form2 = new Form("Languages");
          technology = new ChoiceGroup("Select Technology Which You Know", Choice.MULTIPLE);
                language = new ChoiceGroup("Select the language you mainly using",Choice.MULTIPLE);
          exit = new Command("Exit", Command.EXIT, 1);
          choose = new Command("Choose", Command.SCREEN, 2);
     public void startApp() {
          display = Display.getDisplay(this);
          technology.append("JAVA", null);
          technology.append("J2ME", null);
          technology.append("J2EE", null);
          technology.append("JSF", null);
                language.append("JAVA", null);
          language.append(".NET", null);
          language.append("C++", null);
          language.append("Multimedia", null);
          index1 = form1.append(technology);
                index2 = form2.append(language);
          form1.addCommand(exit);
          form1.addCommand(choose);
          form1.setCommandListener(this);
          display.setCurrent(form1);
                form2.addCommand(exit);
          form2.addCommand(choose);
          form2.setCommandListener(this);
          display.setCurrent(form2);
     public void pauseApp(){}
     public void destroyApp(boolean unconditional){
          notifyDestroyed();
     public void commandAction(Command c, Displayable displayable){
          String label = c.getLabel();
          if (label.equals("Choose")) {
               StringItem message1[] = new StringItem[technology.size()];
                        StringItem message2[] = new StringItem[language.size()];
               boolean get1[] = new boolean[technology.size()];
                        boolean get2[] = new boolean[language.size()];
               technology.getSelectedFlags(get1);
                        language.getSelectedFlags(get2);
               for (int i = 0; i < get1.length; i++) {
                    if (get1) {
                         message1[i] = new StringItem("Your Choice is: ", technology.getString(i));
                         form1.append(message1[i]);
for (int i = 0; i < get2.length; i++) {
                    if (get2[i]) {
                         message2[i] = new StringItem("Your Choice is: ", language.getString(i));
                         form2.append(message2[i]);
               form1.delete(index1);
form1.delete(index2);
               form1.removeCommand(choose);
form2.delete(index1);
form2.delete(index2);
               form2.removeCommand(choose);
          } else if (label.equals("Exit")){
               destroyApp(false);
here is my code. only one question is displaying her
Edited by: Pallavi81 on Nov 17, 2008 11:11 PM

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Edited by: ichiwan on Sep 30, 2007 11:23 AM

{color:#000080}The code you have posted is for a class that extends Form, not MIDlet.
To post code, use code tags --{color} [code]CODE[/code] {color:#000080}is displayed as CODEPlease do not try to format parts of your code as bold or italic as that reduces the readability still more.
db{color}

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userInf.data.userDate = input_date.text;
userInf.data.userAge = input_age.text;
gotoAndStop("pg1");
// QUESTIONS -- 25
// CLOSING
out_score.text = i.toString();
userInf.data.userScore = out_score.text;
trace("out_score.text is " +out_score.text);
input_name.text =userInf.data.userName;
input_date.text = userInf.data.userDate;
input_age.text = userInf.data.userAge;
save_bt.addEventListener(MouseEvent.CLICK, gotoResults);
function gotoResults(evt:MouseEvent): void
userInf.flush();
gotoAndStop("intro");
// clearing data
reset_bt.addEventListener(MouseEvent.CLICK, deleteInf);
function deleteInf(evt:MouseEvent): void
userInf.clear();
gotoAndStop("intro");
For your help!
German

Midlet not running on actual mobile phone

hi,
i made a small mdilet game its running fine on sun tool kit 2.5. but when i try to run it on any mobile phone the mobile phone becomse blank and dont shows anything. im using Nokia 6630,6280 and sony erricson K800i.
please help me asap....

actually im trying to make some sort of bluetooth chess game. i used Tiled Layer class to make the background (chess board) then i put imgaes on that chess board which i created with TiledLayer.
the problem is this that when i made only TiledLayer and displayed it on the midlet it worked fine on all phones but when i pute images on top of that TiledLayer then mobile phones dont show anything not even the chess board
heres the code...
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.TiledLayer;
public class GameScreen extends GameCanvas implements CommandListener, Runnable {
// make ImageSet object
private ImageSet imageSet;
// instance of Graphics object
private Graphics g;
// the game boundary
public static final int GAME_WIDTH = 160;
public static final int GAME_HEIGHT = 160;
// board block size
public static final int BLOCK_X = 18;
public static final int BLOCK_Y = 19;
public static final int B_H_X = 3;
public static final int B_H_Y = 1;
// the new x,y origin of the game
public final int GAME_START_X = (getWidth() - GAME_WIDTH)/2;
public final int GAME_START_Y = (getHeight() - GAME_HEIGHT)/2;
// the end x,y positions of the game
public final int GAME_END_X = 18 * 8 ;
public final int GAME_END_Y = 19 * 8 ;
// block size of elements
public final int BLOCK_SIZE_X = 18;
public final int BLOCK_SIZE_Y = 19;
// anchor for the golden ones
public static final int GRAPHICS_TOP_RIGHT = Graphics.TOP | Graphics.RIGHT;
// anchor for the blue ones
public static final int GRAPHICS_VCENTER_RIGHT = Graphics.VCENTER | Graphics.RIGHT;
// golden elements location the chess Image
private final int goldElmtInImg[] = {0,8,3,4,7,2,9,0};
// blue elements location the chess Image
int blueElmtInImg[] = {0,9,2,5,6,3,8,1};
// these are the images which we will get from ImageSet class
private Image goldens[];
private Image blues[];
// these two images are gray and white area of the chess board
//0 = white
//1 = gray
private Image chkImg[];
public GameScreen() {
    super(true);
    try {
      jbInit();
    catch(Exception e) {
      e.printStackTrace();
private void jbInit() throws Exception {
    g = getGraphics();
    chkImg = new Image[2];
    //create a new ImageSet
    imageSet = new ImageSet();
    // Set up this Displayable to listen to command events
    setCommandListener(this);
    // add the Exit command
    addCommand(new Command("Exit", Command.EXIT, 1));
    try {
      // makes chess Images
      imageSet.makeImages();
      drawImages(g);
    }catch(Exception e){
       e.printStackTrace();
   * The main GAME LOOP which goes infinity untill cancelled by the user
public void run(){
   * Draws the images on the screen on specific locations
   * @param g Graphics: used to draw images on the board.
public void drawImages(Graphics g){
    boolean flag = false;
    chkImg = imageSet.makeChkBox();
    // paint the cheass board on the screen
    imageSet.createChessBoard(GAME_START_X,GAME_START_Y).paint(g);
    // set color to black and draw a rectangle around the chess board.
    g.setColor(0x000000);
    g.drawRect(GAME_START_X,GAME_START_Y,GAME_END_X,GAME_END_Y);
    goldens = imageSet.getGoldens();
    blues = imageSet.getBlues();
    // setting the color to green.
    g.setColor(0,255,0);
    g.drawRect(GAME_START_X+BLOCK_SIZE_X*4,GAME_START_Y+BLOCK_SIZE_Y*5, (GAME_START_X+BLOCK_SIZE_X*4)+BLOCK_SIZE_X,
                                                                     (GAME_START_Y+BLOCK_SIZE_Y*5)+BLOCK_SIZE_Y);
    System.out.println(GAME_START_X+BLOCK_SIZE_X*4+BLOCK_SIZE_X+"      "+GAME_START_Y+BLOCK_SIZE_Y*5+BLOCK_SIZE_Y);
    // drawing golden and blue elements
    g.drawImage(goldens[1],GAME_START_X+B_H_X,GAME_START_Y+B_H_Y,Graphics.TOP|Graphics.LEFT);
    g.drawImage(goldens[10],GAME_START_X+B_H_X,GAME_START_Y+BLOCK_Y+B_H_Y,Graphics.TOP|Graphics.LEFT);
    g.drawImage(blues[0],GAME_START_X+B_H_X,GAME_START_Y+BLOCK_Y*7+B_H_Y,Graphics.TOP|Graphics.LEFT);
    g.drawImage(blues[11],GAME_START_X+B_H_X,GAME_START_Y+BLOCK_Y*6+B_H_Y,Graphics.TOP|Graphics.LEFT);
    for (int i =1; i<=7; i++){
      g.drawImage(goldens[goldElmtInImg],GAME_START_X+BLOCK_X*i,
GAME_START_Y+B_H_Y,Graphics.TOP|Graphics.LEFT);
g.drawImage(blues[blueElmtInImg[i]],GAME_START_X+BLOCK_X*i,
GAME_START_Y+BLOCK_Y*7+B_H_Y,Graphics.TOP|Graphics.LEFT);
if(flag==true){
g.drawImage(goldens[10],GAME_START_X+BLOCK_X * i +B_H_X ,
GAME_START_Y+BLOCK_Y+B_H_Y,Graphics.TOP|Graphics.LEFT);
g.drawImage(blues[11], GAME_START_X BLOCK_X * i B_H_X,
GAME_START_Y + BLOCK_Y * 6 +B_H_Y,Graphics.TOP | Graphics.LEFT);
flag = false;
else{
g.drawImage(goldens[11],GAME_START_X+BLOCK_X * i +B_H_X ,
GAME_START_Y+BLOCK_Y+B_H_Y,Graphics.TOP|Graphics.LEFT);
g.drawImage(blues[10], GAME_START_X BLOCK_X * i B_H_X,
GAME_START_Y + BLOCK_Y * 6 + B_H_Y,Graphics.TOP | Graphics.LEFT);
flag = true;
public void commandAction(Command command, Displayable displayable) {
/** @todo Add command handling code */
if (command.getCommandType() == Command.EXIT) {
// stop the MIDlet
ChessProject.quitApp();
the helping class ImageSet which extracts the images from rerource file and manipulates them
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.TiledLayer;
public class ImageSet {
    // create a 2d array to store coordinates of images and their size
    // 1. size x
    // 2. size y
    // 3. location on the PNG
    private final int elements[][] = {{13,15,15},   // Gray Rock
                                     {13,15,28},   // White Rock
                                     {16,16,46},   // Gray Bishop
                                     {16,16,63},   // White Bishop
                                     {18,17,81},   // Gray Queen
                                     {18,17,99},   // White Queen
                                     {17,17,116}, // Gray King
                                     {17,17,133}, // White King
                                     {16,16,149}, // Gray Knight
                                     {16,16,167}, // White Knight
                                     {13,17,181}, // Gray Pawn
                                     {13,17,194}   // White Pawn
    private final int CELLS[] = {
                                2, 1, 2, 1, 2, 1, 2, 1,
                                1, 2, 1, 2, 1, 2, 1, 2,
                                2, 1, 2, 1, 2, 1, 2, 1,
                                1, 2, 1, 2, 1, 2, 1, 2,
                                2, 1, 2, 1, 2, 1, 2, 1,
                                1, 2, 1, 2, 1, 2, 1, 2,
                                2, 1, 2, 1, 2, 1, 2, 1,
                                1, 2, 1, 2, 1, 2, 1, 2
// anchor for the golden ones
public static final int GRAPHICS_TOP_RIGHT = Graphics.TOP | Graphics.RIGHT;
// anchor for the blue ones
public static final int GRAPHICS_VCENTER_RIGHT = Graphics.VCENTER | Graphics.RIGHT;
// array of images others
private Image allImagesOne[];
// array of images mine
private Image allImagesTwo[];
public Image chessImg;
// image to make the chess board
private Image backgrndImg;
// to create the chess board
private TiledLayer background;
private Image chkImg[] = new Image[2];
   * construction for initializing values
public ImageSet() {
    allImagesOne = new Image[12];
    allImagesTwo = new Image[12];
    try{
      chessImg = Image.createImage("/chess.png");
      backgrndImg = Image.createImage("/board.png");
    }catch(Exception e){
      e.printStackTrace();
   * This method creates the chess board and returns it to the calling code
   * @param GAME_START_X int: start position of game x axis
   * @param GAME_START_Y int: start position of game y axis
   * @return TiledLayer: the TiledLayer object returned
public TiledLayer createChessBoard(int GAME_START_X, int GAME_START_Y){
    //create TiledLayer of image
    background = new TiledLayer(8, 8, backgrndImg,18 ,19);
    for (int i =0; i<CELLS.length; i++){
      int column = i % 8;
      int row = (i - column)/8;
      background.setCell(column, row, CELLS);
System.out.println(GAME_START_X+" "+GAME_START_Y);
background.setPosition(GAME_START_X,GAME_START_Y);
return background;
* this method creates two check boxes of board.png and returns to calling program
* @return Image[]
public Image[] makeChkBox(){
chkImg[0] = Image.createImage(18,19);
chkImg[1] = Image.createImage(18,19);
chkImg[0].getGraphics().drawImage(backgrndImg, 18,0,GRAPHICS_TOP_RIGHT); // gray area
chkImg[1].getGraphics().drawImage(backgrndImg, 37,0,GRAPHICS_TOP_RIGHT); // white area
return chkImg;
* Make the images of chess game and fill them in 2 arrays of the users one and two.
public void makeImages() throws Exception{
int tempVar =0;
// get golden images
for (int j = 0; j < 12; j++) {
allImagesOne[j] = Image.createImage(elements[j][tempVar],
elements[tempVar][++tempVar]);
allImagesOne[j].getGraphics().drawImage(chessImg, elements[j][++tempVar], 0,
GRAPHICS_TOP_RIGHT);
tempVar-=2;
setGoldens(allImagesOne);
// get the blue images
for (int j = 0; j<12; j++){
allImagesTwo[j] = Image.createImage(elements[j][tempVar],
elements[tempVar][++tempVar]);
allImagesTwo[j].getGraphics().drawImage(chessImg,
elements[j][++tempVar], 0,
GRAPHICS_VCENTER_RIGHT);
tempVar-=2;
public void setGoldens (Image allImagesOne[]){
this.allImagesOne = allImagesOne;
public void setBlues(Image allImagesTwo[]){
this.allImagesTwo = allImagesTwo;
public Image[] getGoldens (){
return this.allImagesOne;
public Image[] getBlues (){
return this.allImagesTwo;

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