How to run TiledLayer in midp 2.0 of j2me

[narasimha]

hi....every one
I need help of you to run tiledlayer in j2me.when i run below program it is saying IlligalStateExcepion.so i unable to run this program.so plz kindly help me.

I written program as like below

import java.io.IOException;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;



public class SpriteCollideMIDlet extends MIDlet {

SpriteCollideCancas canvas = new SpriteCollideCancas();

public SpriteCollideMIDlet(){ }

protected void destroyApp(boolean some) throws MIDletStateChangeException{ }

protected void pauseApp() { }

protected void startApp()throws MIDletStateChangeException {

Display display = Display.getDisplay(this);

canvas.start();

display.setCurrent(canvas);
}
}

class SpriteCollideCancas extends GameCanvas implements Runnable {

static int FRONT_DIRECTION = 0;

static int LEFT_DIRECTION = 1;

static int RIGHT_DIRECTION = 2;

static int BACK_DIRECTION = 3;

Sprite hero,hero2;

boolean running;

int[][] sequence = {{0,1,2,3},{4,5,6,7},{8,9,10,11},{12,13,14,15}};

int s2[] ={8,9,10,11};

int w,h;

Image img_bg = null;

int cx,cy,cx2,cy2;

int currentDirection = FRONT_DIRECTION;

protected SpriteCollideCancas() {

super(true);

Image im = null,hm2 = null;

try{


im = Image.createImage("/grid.png");
hm2 = Image.createImage("/grid1.png");

img_bg = Image.createImage("/kodim22.png");

}catch(IOException e){ }

hero = new Sprite(im,8,10);

hero2 = new Sprite(hm2,8,10);

w = getWidth();
h = getHeight();

cx = w/2;
cy = h/2;

hero.setFrameSequence(sequence[0]);
hero2.setFrameSequence(s2);
}

public void start(){

running = true;

Thread t = new Thread(this);

t.start();
}
public void run(){

Graphics g =getGraphics();

int delay=100;

while(running){

moving();

getInput();

hero2.nextFrame();
drawScreen(g);
try{

Thread.sleep(delay);
}catch(InterruptedException e){}
}
}
void moving(){

if(cx2>getWidth()){
cx2=0;
}
if(!hero2.collidesWith(hero,false))
cx2++;
}
void getInput(){

int keyState = getKeyStates();

int cDirection = currentDirection;

if(keyState==LEFT_PRESSED){

if(!hero.collidesWith(hero2,false)){

cx=cx-5;cx=Math.max(0,cx);
currentDirection=LEFT_DIRECTION;
}hero.nextFrame();
}else if(keyState==RIGHT_PRESSED){

cx=cx+5;cx=Math.min(cx,w-32);
currentDirection=RIGHT_DIRECTION;
hero.nextFrame();
}else if(keyState==UP_PRESSED){

cy=cy-5;cy=Math.max(0,cy);
currentDirection=BACK_DIRECTION;
hero.nextFrame();
}else if(keyState==DOWN_PRESSED){

cy=cy-5; cy=Math.min(cy,h-50);
currentDirection=FRONT_DIRECTION;
hero.nextFrame();
}

if(cDirection!=currentDirection){

hero.setFrameSequence(sequence[currentDirection]);
}
}

void drawScreen(Graphics g){

g.drawImage(img_bg,0-cx,0-cy,Graphics.TOP|Graphics.LEFT);

hero2.setPosition(cx2,cy2+20);
hero2.paint(g);
hero.setPosition(cx,cy);
hero.paint(g);
flushGraphics();
}
}

[DarrylBurke]

when i run below program it is saying IlligalStateExcepion.

Post the stack trace and indicate which line of code is causing the Exception.

db