import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import java.util.*;
import java.io.*;

public class hDigitalClock extends JPanel implements Runnable {
	int size = 7;
	int totSecs;
	long lastTime = 0, thisTime;
	digitalNumber h1, m1, m2, s1;
	GregorianCalendar cal;
	Thread th;
	
	public hDigitalClock() {
		h1 = new digitalNumber(50, 100, size);
		m1 = new digitalNumber(150, 100, size);
		m2 = new digitalNumber(230, 100, size);
		s1 = new digitalNumber(330, 100, size);
		
		setBackground(Color.WHITE);
		setLayout(new BorderLayout());
		start();
	}
	
	public void start() {
		if (th == null) {
			th = new Thread(this);
			th.start();
		}
	}
	
	public void run() {
		while (th != null) {
			try {
				totSecs = setSecs();
				showTime();
				repaint();
				Thread.sleep(0, 439453133);
			} catch (Exception e) {
			}
		}
	}
	
	public void stop() {
		if (th != null)
			th = null;
	}
	
	public int setSecs() {
		cal = new GregorianCalendar();
		int h, m, s;		
		h = cal.get(Calendar.HOUR) * 3600;
		if (cal.get(Calendar.AM_PM) == Calendar.PM)
			h += 3600 * 12;
		m = cal.get(Calendar.MINUTE) * 60;
		s = cal.get(Calendar.SECOND);
		return h+m+s;
	}
	
	public int divide(int a, int b) {
			int z = 0;
        	int i = a;

        	while (i >= b) {
            		i = i - b;
            		z++;
          	}
        	return z;
    }
	
	public void showTime() {
		int secs, hours, minute1, minute2;
		if(totSecs > 86399)
			totSecs=0;		
		
		secs = (int)(totSecs / 1.3183594);
		hours = divide(secs, 4096);
		secs = secs - (hours * 4096);
		minute1 = divide(secs, 256);
		secs = secs - (minute1 * 256);
		minute2 = divide(secs, 16);
		secs = secs - (minute2 * 16);
//Convert and store each place of the time to its proper value
		h1.setNumber(hours);
		m1.setNumber(minute1);
		m2.setNumber(minute2);
		s1.setNumber(secs);
	}

	public void showDots(Graphics2D g2) {
		g2.setColor(Color.RED);
		g2.fill(new Rectangle2D.Double(128, 65, 14, 14));
		g2.fill(new Rectangle2D.Double(128, 135, 14, 14));
		g2.fill(new Rectangle2D.Double(308, 65, 14, 14));
		g2.fill(new Rectangle2D.Double(308, 135, 14, 14));
//Create the dots between the hours and the minutes, and between the
//minutes and the seconds	
	}
	
	public void paint(Graphics g) {
		super.paint(g);
		Graphics2D g2 = (Graphics2D)g;
		h1.drawNumber(g2);
		m1.drawNumber(g2);
		m2.drawNumber(g2);
		s1.drawNumber(g2);
		showDots(g2);
	}
	
	public static void main(String[] a) {
//Creates our window and places the objects in it accordingly
		JFrame f = new JFrame("Digital Clock");
    	f.setSize(450, 220);
    	f.setTitle("Hexadecimal Clock");
    	f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	f.setVisible(true); 
    	f.getContentPane().add(new hDigitalClock());
	}
}

class digitalNumber {
	int x, y;
	int k;
	led[] leds;
	
	public digitalNumber(int x, int y, int k) {
//Draws the LEDs uniformly in their proper positions on the display		
		this.x = x;
		this.y = y;
		this.k = k;
		leds = new led[7];
		leds[0] = new led(x, y, "vert");
		leds[1] = new led(x, y+10*k, "vert");
		leds[2] = new led(x+8*k, y, "vert");
		leds[3] = new led(x+8*k, y+10*k, "vert");
		leds[4] = new led(x+2*k, y-9*k, "horiz");
		leds[5] = new led(x+2*k, y+k, "horiz");
		leds[6] = new led(x+2*k, y+11*k, "horiz");
	}
	
	public void setNumber(int num) {
//Set each LED of the display to its hex number 0-F
//each if branch handles one possibility of the state
//of the LED	
		if(num == 0) {
			leds[0].setState(true);		//top left LED
			leds[1].setState(true); 	//bottom left LED
			leds[2].setState(true); 	//top right LED
			leds[3].setState(true); 	//bottom right LED
			leds[4].setState(true); 	//top center LED
			leds[5].setState(false);	//middle center LED
			leds[6].setState(true); 	//bottom center LED
		} else if(num == 1) {
			leds[0].setState(false);
			leds[1].setState(false);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(false);
			leds[5].setState(false);
			leds[6].setState(false);			
		} else if(num == 2) {
			leds[0].setState(false);
			leds[1].setState(true);
			leds[2].setState(true);
			leds[3].setState(false);
			leds[4].setState(true);
			leds[5].setState(true);
			leds[6].setState(true);			
		} else if(num == 3) {
			leds[0].setState(false);
			leds[1].setState(false);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(true);
			leds[5].setState(true);
			leds[6].setState(true);			
		} else if(num == 4) {
			leds[0].setState(true);
			leds[1].setState(false);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(false);
			leds[5].setState(true);
			leds[6].setState(false);			
		} else if(num == 5) {
			leds[0].setState(true);
			leds[1].setState(false);			
			leds[2].setState(false);
			leds[3].setState(true);
			leds[4].setState(true);
			leds[5].setState(true);
			leds[6].setState(true);			
		} else if(num == 6) {
			leds[0].setState(true);
			leds[1].setState(true);			
			leds[2].setState(false);
			leds[3].setState(true);
			leds[4].setState(true);
			leds[5].setState(true);
			leds[6].setState(true);			
		} else if(num == 7) {
			leds[0].setState(false);
			leds[1].setState(false);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(true);
			leds[5].setState(false);
			leds[6].setState(false);		
		} else if(num == 8) {
			leds[0].setState(true);
			leds[1].setState(true);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(true);
			leds[5].setState(true);
			leds[6].setState(true);		
		} else if(num == 9) {
			leds[0].setState(true);
			leds[1].setState(false);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(true);
			leds[5].setState(true);
			leds[6].setState(true);		
		} else if(num == 10) {
			leds[0].setState(true);
			leds[1].setState(true);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(true);
			leds[5].setState(true);
			leds[6].setState(false);
		} else if(num == 11) {
			leds[0].setState(true);
			leds[1].setState(true);
			leds[2].setState(false);
			leds[3].setState(true);
			leds[4].setState(false);
			leds[5].setState(true);
			leds[6].setState(true);
		} else if(num == 12) {
			leds[0].setState(true);
			leds[1].setState(true);
			leds[2].setState(false);
			leds[3].setState(false);
			leds[4].setState(true); 
			leds[5].setState(false);
			leds[6].setState(true);
		} else if(num == 13) {
			leds[0].setState(false);
			leds[1].setState(true);
			leds[2].setState(true);
			leds[3].setState(true);
			leds[4].setState(false);
			leds[5].setState(true);
			leds[6].setState(true);
		} else if(num == 14) {
			leds[0].setState(true);
			leds[1].setState(true);
			leds[2].setState(false);
			leds[3].setState(false);
			leds[4].setState(true); 
			leds[5].setState(true);
			leds[6].setState(true);
		} else if(num == 15) {
			leds[0].setState(true);
			leds[1].setState(true);
			leds[2].setState(false);
			leds[3].setState(false);
			leds[4].setState(true); 
			leds[5].setState(true);
			leds[6].setState(false);
		}
	}
	
	public void drawNumber(Graphics2D g2) {
		for(int i=0; i<7; i++) {
			leds[i].render(g2);
		}
	}
	
	class led {
		int x, y;
		Polygon p;
		String type;
		
		public led(int x, int y, String type) {
			this.x = x;
			this.y = y;
			this.type = type;

			p = new Polygon();
						
			if(type == "vert") {
				p.addPoint(x, y);
				p.addPoint(x+k, y+k);
				p.addPoint(x+2*k, y);
				p.addPoint(x+2*k, y-8*k);
				p.addPoint(x+k, y-9*k);
				p.addPoint(x, y-8*k);
			}
			
			if(type == "horiz") {
				p.addPoint(x, y);
				p.addPoint(x+k, y+k);
				p.addPoint(x+5*k, y+k);
				p.addPoint(x+6*k, y);
				p.addPoint(x+5*k, y-k);
				p.addPoint(x+k, y-k);				
			}
		}
		
		public void render(Graphics2D g2){
//fills the polygons for the LEDs with the color specified in the 
//setColor method
			g2.setColor(new Color.RED);
			g2.fillPolygon(p);
		}		
}