public void keyReleased(KeyEvent e)
    {
		int key=e.getKeyCode();
        if(key==KeyEvent.VK_UP || key== KeyEvent.VK_DOWN)
            dy=0;
        if(key==KeyEvent.VK_LEFT || key== KeyEvent.VK_RIGHT)
            dx=0;
        if(key == KeyEvent.VK_SPACE) {
        	isCharging = false;
        	fire();
        }
    }