IT2301 - Java Programs - Develop a application using GUI and multithreads in java

import java.awt.*;

import java.awt.Graphics2D;

import javax.swing.*;

import java.util.*;

import java.awt.event.*;

class AnalogClock extends JPanel

{

ImageIcon img;

private GregorianCalendar m_calendar;

private int[] x=new int[2];

private int[] y=new int[2];                                                                   

private java.util.Timer clocktimer=new java.util.Timer();

private TimeZone clockTimeZone=TimeZone.getDefault();

public AnalogClock()

{

this.setPreferredSize(new Dimension(210,210));

this.setMinimumSize(new Dimension(210,210));

clocktimer.schedule(new TickTimerTask(),0,1000);

}

public void paint(Graphics g)

{

g.setColor(Color.orange);

g.fillRect(0,0,this.getWidth(),this.getHeight());

drawCardinals((Graphics2D)g);

drawHands((Graphics2D)g);

}

void clockMinutes(int startRadius,int endRadius,double theta)

{

theta-=Math.PI/2;

x[0]=(int)(getWidth()/2+startRadius*Math.cos(theta));

y[0]=(int)(getHeight()/2+startRadius*Math.sin(theta));

x[1]=(int)(getWidth()/2+endRadius*Math.cos(theta));

y[1]=(int)(getHeight()/2+endRadius*Math.sin(theta));

}

void drawCardinals(Graphics2D g)

{

g.setStroke(new BasicStroke(9));

g.setColor(Color.black);

for(double theta=0;theta

{

clockMinutes(100,100,theta);

g.drawPolyline(x,y,2);

}

}

public void drawHands(Graphics2D g)

{

double h=2*Math.PI*(m_calendar.get(Calendar.HOUR));

double m=2*Math.PI*(m_calendar.get(Calendar.MINUTE));

double s=2*Math.PI*(m_calendar.get(Calendar.SECOND));

g.setStroke(new BasicStroke(9));

clockMinutes(0,55,h/12+m/(60*12));

g.setColor(Color.red);

g.drawPolyline(x,y,2);

clockMinutes(0,70,m/60+s/(60*60));

g.setColor(Color.blue);

g.drawPolyline(x,y,2);

clockMinutes(0,70,s/60);

g.setColor(Color.black);

g.drawPolyline(x,y,2);

g.fillOval(getWidth()/2-8,getHeight()/2-8,16,16);

}

class TickTimerTask extends TimerTask

{

public void run()

{

m_calendar=(GregorianCalendar)GregorianCalendar.getInstance(clockTimeZone);

repaint();

}

}

}

class Analog

{

public static void main(String[] args)

{

JFrame frame = new JFrame();

frame.setSize(300, 400);

frame.setTitle("My Java Project Clock");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setIconImage(Toolkit.getDefaultToolkit().getImage("Clock.gif"));

AnalogClock m_AnalogClock=new AnalogClock();

frame.add(m_AnalogClock);

frame.setVisible(true);

}

}

Output:

C:\jdk1.5.0\bin>javac Analog.java

C:\jdk1.5.0\bin>java Analog