I got the following exception when I try to my little applicaiton.
ALERT: java/lang/ClassFormatError: Bad version information.

I googled a lot. Some people say it is because of the JDK version as JDK1.5 and upper do not support J2me (Really?). However, even I tried 1.4, it still get me the same error. Any one can help me out please?

			

			package hongliang;
			

			import javax.microedition.midlet.*;
			

			import javax.microedition.lcdui.*;
			

			

			public class ExampleGameSpriteMidlet extends MIDlet {
			

			private Display display;
			

			

			public void startApp() {
			

			try {
			

			display = Display.getDisplay(this);
			

			ExampleGameCanvas gameCanvas = new ExampleGameCanvas();
			

			gameCanvas.start();
			

			display.setCurrent(gameCanvas);
			

			} catch (Exception ex) {
			

			System.out.println(ex);
			

			}
			

			}
			

			

			public Display getDisplay() {
			

			return display;
			

			}
			

			

			public void pauseApp() {
			

			}
			

			

			public void destroyApp(boolean unconditional) {
			

			exit();
			

			}
			

			

			public void exit() {
			

			System.gc();
			

			destroyApp(false);
			

			notifyDestroyed();
			

			}
			

			}
			

			

			

			

			package hongliang;
			

			import javax.microedition.lcdui.*;
			

			import javax.microedition.lcdui.game.*;
			

			

			public class ExampleGameCanvas extends GameCanvas implements Runnable {
			

			private boolean isPlay;   // Game Loop runs when isPlay is true
			

			private long delay;       // To give thread consistency
			

			private int currentX, currentY;  // To hold current position of the 'X'
			

			private int width;        // To hold screen width
			

			private int height;       // To hold screen height
			

			

			// Sprites to be used
			

			private Sprite sprite;
			

			private Sprite nonTransparentSprite;
			

			

			// Constructor and initialization
			

			public ExampleGameCanvas() throws Exception {
			

			super(true);
			

			width = getWidth();
			

			height = getHeight();
			

			currentX = width / 2;
			

			currentY = height / 2;
			

			delay = 20;
			

			

			// Load Images to Sprites
			

			Image image = Image.createImage("/transparent.png");
			

			sprite = new Sprite (image,32,32);
			

			

			Image imageTemp = Image.createImage("/nontransparent.png");
			

			nonTransparentSprite = new Sprite (imageTemp,32,32);
			

			

			}
			

			

			// Automatically start thread for game loop
			

			public void start() {
			

			isPlay = true;
			

			Thread t = new Thread(this);
			

			t.start();
			

			}
			

			

			public void stop() { isPlay = false; }
			

			

			// Main Game Loop
			

			public void run() {
			

			Graphics g = getGraphics();
			

			while (isPlay == true) {
			

			

			input();
			

			drawScreen(g);
			

			try { Thread.sleep(delay); }
			

			catch (InterruptedException ie) {}
			

			}
			

			}
			

			

			// Method to Handle User Inputs
			

			private void input() {
			

			int keyStates = getKeyStates();
			

			

			sprite.setFrame(0);
			

			

			// Left
			

			if ((keyStates & LEFT_PRESSED) != 0) {
			

			currentX = Math.max(0, currentX - 1);
			

			sprite.setFrame(1);
			

			}
			

			

			// Right
			

			if ((keyStates & RIGHT_PRESSED) !=0 )
			

			if ( currentX + 5
			< width) {
			

			currentX = Math.min(width, currentX + 1);
			

			sprite.setFrame(3);
			

			}
			

			

			// Up
			

			if ((keyStates & UP_PRESSED) != 0) {
			

			currentY = Math.max(0, currentY - 1);
			

			sprite.setFrame(2);
			

			}
			

			

			// Down
			

			if ((keyStates & DOWN_PRESSED) !=0)
			

			if ( currentY + 10
			< height) {
			

			currentY = Math.min(height, currentY + 1);
			

			sprite.setFrame(4);
			

			}
			

			}
			

			

			// Method to Display Graphics
			

			private void drawScreen(Graphics g) {
			

			//g.setColor(0xffffff);
			

			g.setColor(0xFF0000);
			

			g.fillRect(0, 0, getWidth(), getHeight());
			

			g.setColor(0x0000ff);
			

			

			// display sprites
			

			sprite.setPosition(currentX,currentY);
			

			sprite.paint(g);
			

			nonTransparentSprite.paint(g);
			

			

			flushGraphics();
			

			}
			

			

			}