Clock Application using Java - Java Source Code for Analog Clock Application

For my java practical lab experiments, i had to create an analog clock using java. So, i created a

Analog Clock Application using Java.

simple analog clock using java. The program source code is added below. It makes use of java 2D Graphics Object and draws the clock in the screen. The clock displays all the three hands (hour hand, second hand and minute hand). The program source code is as follows. The screenshot of the java analog clock application is also added.

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.util.Date;
import javax.swing.JPanel;
import javax.swing.WindowConstants;


public class Clock extends javax.swing.JFrame {


    public int hour;
    public int min;
    public int sec;
    ClockDial cd;

    public Clock() {
        setSize(510,530);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        cd=new ClockDial(this);
        getContentPane().add(cd);
        Date curr=new Date();
        String time=curr.toString();
        hour=Integer.parseInt(time.substring(11,13));
        min=Integer.parseInt(time.substring(14,16));
        sec=Integer.parseInt(time.substring(17,19));
        ClockEngine.setPriority(ClockEngine.getPriority()+3);
        ClockEngine.start();
    }

public static void main(String args[]) {
                new Clock().setVisible(true);
    }

Thread ClockEngine=new Thread()

{
int newsec,newmin;

public void run()
  {
  while(true)
    {
    newsec=(sec+1)%60;
    newmin=(min+(sec+1)/60)%60;
    hour=(hour+(min+(sec+1)/60)/60)%12;
    sec=newsec;
    min=newmin;

    try {

          Thread.sleep(1000);

      } catch (InterruptedException ex) {}

    cd.repaint();
    }
}
};
}


class ClockDial extends JPanel{

    Clock parent;
    public ClockDial(Clock pt){
        setSize(520,530);
        parent=pt;
    }

   
    @Override
 public void paintComponent(Graphics g) {
        g.setColor(Color.BLACK);
        g.fillRect(0, 0, getWidth(), getHeight());
        g.setColor(Color.WHITE);
        g.fillOval(5, 5,480,480);
        g.setColor(Color.BLACK);
        g.fillOval(10, 10,470,470);
        g.setColor(Color.WHITE);
        g.fillOval(237,237,15,15);
        g.setFont(g.getFont().deriveFont(Font.BOLD,32));

        for(int i=1;i<=12;i++)
            g.drawString(Integer.toString(i),240-(i/12)*11+(int)(210*Math.sin(i*Math.PI/6)),253-(int)(210*Math.cos(i*Math.PI/6)));

        double minsecdeg=(double)Math.PI/30;
        double hrdeg=(double)Math.PI/6;
        int tx,ty;
        int xpoints[]=new int[3];
        int ypoints[]=new int[3];
 
       //second hand
        tx=245+(int)(210*Math.sin(parent.sec*minsecdeg));
        ty=245-(int)(210*Math.cos(parent.sec*minsecdeg));
        g.drawLine(245,245,tx,ty);

        //minute hand
        tx=245+(int)(190*Math.sin(parent.min*minsecdeg));
        ty=245-(int)(190*Math.cos(parent.min*minsecdeg));
        xpoints[0]=245;
        xpoints[1]=tx+2;
        xpoints[2]=tx-2;
        ypoints[0]=245;
        ypoints[1]=ty+2;
        ypoints[2]=ty-2;
        g.fillPolygon(xpoints, ypoints,3);

        //hour hand
        tx=245+(int)(160*Math.sin(parent.hour*hrdeg+parent.min*Math.PI/360));
        ty=245-(int)(160*Math.cos(parent.hour*hrdeg+parent.min*Math.PI/360));
        xpoints[1]=tx+4;
        xpoints[2]=tx-4;
        ypoints[1]=ty-4;
        ypoints[2]=ty+4;
        g.fillPolygon(xpoints, ypoints, 3);

    }

}