changing colors

[DerPflug]

How can I get the color of a rectangle to toggle between two colors periodically?

Thanks in advance.

 

[HavaTheJut]

This class draws a rectangle at 100,100 in the specified frame and switches the color between blue and red every second.

RectThread rt = new RectThread(myFrame);
rt.start();

public class RectThread extends Thread
{
  private Frame mFrame;

  public RectThread(Frame f)
  {
    mFrame = f;
    mFrame.getGraphics().setColor(Color.RED);
  }

  public void run()
  {
    Graphics g = mFrame.getGraphics();
    Color c = g.getColor();
    while(true)
    {
      if (c.equals(Color.RED))
      {
        c = Color.BLUE;
      }
      else
      {
        c = Color.RED;
      }
      g.setColor(c);
      g.drawRect(100,100,100,100);
      try { sleep(1000); } catch(Exception eSleep) {}
    }
  }
}