ClockComponent.java

import java.awt.*;
import javax.swing.JComponent;
import javax.swing.Timer;
import java.time.LocalTime;

public class ClockComponent extends JComponent {

	public ClockComponent() {
	}

	public void paint(Graphics g) {
		// the frame's dimensions
		final int w = getWidth();  // width
		final int h = getHeight(); // height

		// clear the specified rectangle by filling it with the background colour
		// useful when resizing because we want to erase what there was before
		g.clearRect(0, 0, w, h);

        // set up our transform to be relative to a 200x200 box
		Graphics2D g2 = (Graphics2D) g.create();
		g2.setRenderingHint(
			RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        // move to centre
        g2.translate(w/2.0, h/2.0);
        // scale
        int min = Math.min(w, h);
        double scaleFactor = min/(double)Clock.SCALE;
        g2.scale(scaleFactor, scaleFactor);
        // move to top left of bound
        g2.translate(-Clock.CENTRE, -Clock.CENTRE);

		// draw the 200x200 box
		Clock c = new Clock();
		c.draw(g2);

		g2.dispose();
	}
}