import java.awt.*;

class LED extends Component {
  int radius;
  Color color;
  boolean on;

  public LED(int r, Color c) {
    super();
    radius=r;
    color=c;
  }
  public LED() { this(10,Color.red); }

  public void setColor(Color c) { color=c;repaint(); }
  public Color getColor() { return color; }
  public void setOn(boolean o) { on=o;repaint(); }
  public boolean getOn() { return on; }

  public void paint(Graphics g) {
    g.setColor( on ? color : color.darker().darker());
    g.fillOval(2,2,radius*2,radius*2);
    for(int i=(radius/6);i<(radius/2);i++) {
      g.setColor(Color.white);
      g.drawArc(3+i,3+i,radius, radius,90,90);
      if(!on) {
        g.setColor(Color.black);
        g.drawArc(radius,radius,radius*2-(i+3),radius*2-(i+3),270,90);
      }
    }
  }
  public Dimension getPreferredSize() { return new Dimension(2*radius+4,2*radius+4); }
  public Dimension getMaximumSize() { return getPreferredSize(); }
  public Dimension getMinimumSize() { return getPreferredSize(); }
}