import java.awt.*;
import java.util.*;

public class Clock extends java.applet.Applet implements Runnable
{

	Thread clockThread;
	int radius, diameter, diameterOval, radiusNumbers;
	int cx, cy;
	Point[] points;

	public void start()
	{
		
		resize(50, 50);
		radius = 20;
		cx = cy = 25;
		diameter = 40;
		diameterOval = 48;
		
		if (clockThread == null)
		{
			clockThread = new Thread(this, "Clock");
			clockThread.start();
		}

	}

	public void stop()
	{
		clockThread.stop();
		clockThread = null;
	}

	public void run()
	{
		while (clockThread != null)
		{
			repaint();
			try
			{
				clockThread.sleep(1000);
			}
			catch (InterruptedException e)
			{
				System.out.println("Interrupt Exception");
			}
		}
	}

	public void paint(Graphics g)
	{

		Date now = new Date();

		setBackground(Color.white);

		g.setColor(Color.black);
		g.drawOval(1, 1, diameterOval, diameterOval);
	
		//set font size
		Font font = new Font("Arial", Font.BOLD, 7);
		g.setFont(font);
		FontMetrics fontMetrics = g.getFontMetrics(font);

		setClockNumbers();
		for (int i = 0; i < 12; i++)
		{
			if ( i == 0 )
			{
				g.drawString("12", points[i].x, points[i].y);
			}
			else
			{
				Integer number = new Integer (i);
				g.drawString(number.toString(), points[i].x, points[i].y);
			}
		}

		//second hand
		g.setColor(Color.red);
		g.drawLine
		(
			 cx
			,cy
			,cx+(int)(Math.round(0.8*radius*Math.sin(now.getSeconds()*3.14/30.0)))
			,cy-(int)(Math.round(0.8*radius*Math.cos(now.getSeconds()*3.14/30.0)))
		);

		//minute hand
		g.setColor(Color.green);
		g.drawLine
		(
			 cx
			,cy
			,cx+(int)(Math.round(0.6*radius*Math.sin(now.getMinutes()*3.14/30.0)))
			,cy-(int)(Math.round(0.6*radius*Math.cos(now.getMinutes()*3.14/30.0)))
		);

		//hour hand
		g.setColor(Color.blue);
		g.drawLine
		(
			 cx
			,cy
			,cx+(int)(Math.round(radius*0.4*Math.sin((now.getHours()%12)*3.14/6.0 + (3.14*now.getMinutes()/360.0))))
			,cy-(int)(Math.round(radius*0.4*Math.cos((now.getHours()%12)*3.14/6.0+ (3.14*now.getMinutes()/360.0))))
		);
	}

	private void setClockNumbers()
	{
		points = new Point[12];
		double twelth = Math.PI / 6;
		double half = Math.PI / 2;
		int radiusNumbers = 20;

		for (int i = 0; i < points.length; i++)
		{
			int nx = (int) ((Math.cos((i * twelth) - half) * radiusNumbers) + radiusNumbers + 3.5);
			int ny = (int) ((Math.sin((i * twelth) - half) * radiusNumbers) + radiusNumbers + 8.5);
			points[i] = new Point(nx, ny);
		}

	}

}