Moving a box with a thread

Question

i have been trying to do this for like a week. i have a class Panel and a class Car and i want to draw a moving box on the panel. if i put every thing in the class Panel it works but then if i put it in to Car it doesn't. i want the class Car to implement Runnable (when i did this in the Panel class i just created a new thread) Car should have a method draw (so it knows how to draw a car) and method move (it moves the car across the screen) here is my code that i have now
public class Panel extends JPanel implements ActionListener{
     private JPanel controls;
     private JButton light, start;
private Car c = new Car();
     public Panel(JFrame f) {
          c.setMove(false);
          controls = new JPanel();
          f.add(controls, BorderLayout.SOUTH);
          start = new JButton("start");
          start.addActionListener(this);
          controls.add(start);
     protected void paintComponent(Graphics g) {
super.paintComponent(g);
c.drawCar(g);
     public void actionPerformed(ActionEvent e) {
          if(e.getSource() == start){
               if(c.isMove() == false){
                    c.start();
               }else if(c.isMove() == true){
                    c.stop();
               }else{
                    System.err.println("error");
public class Car extends JComponent implements Runnable{
     private double carSize = 25;
     private boolean move = true;
     private int carX = 0, carY = 5;
     public void drawCar(Graphics g){
Graphics2D g2d = (Graphics2D)g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setColor(Color.red);
g2d.fill(new Rectangle2D.Double(carX, carY, carSize, 12));
     public int getCarX() {
          return carX;
     public void setCarX(int carX) {
          this.carX = carX;
     public boolean isMove() {
          return move;
     public void setMove(boolean move) {
          this.move = move;
public void run(){
while(isMove()){
     setCarX(getCarX() + 1);
if(getCarX() + 50>= getWidth())
break;
try{
Thread.sleep(10);
catch (InterruptedException ignored){
System.out.println("Error");
setMove(false);
repaint();
Thank you everyone
artem

Answer 1

               if(c.isMove() == false){
                    c.start();
               }else if(c.isMove() == true){
                    c.stop();
               }else{
                    System.err.println("error");
Hi, welcome to the forums!
Just some administrative stuff: in the future, when you post code, please selected it and hit the "CODE" button in the toolbar of the editing box.
As the compiler is probably telling you, your "Car" class has no methods called start() and stop(). You are probably thinking of Thread.start() and Thread.stop(), but your Car class implements Runnable, which only has a run() method.
If you want the code in c.run() to be run in a new thread, create a new thread and start it like this:
Thread carThread = new Thread(c);
carThread.start();