عمل ساعة رقمية بالجافا

This is a basic digital clock in Java that works off your operating system time, it works in a multithreaded environment and have coded it to put my own background in.

كود

import java.awt.*;
import javax.swing.*;
import java.util.*;

class Clock extends JFrame implements Runnable
{
Thread runner; //declare global objects
Font clockFont;

public Clock()
{
super("Java clock");
setSize( 350, 100);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
setResizable(false); //create window

clockFont = new Font("Serif", Font.BOLD, 40); //create font instance

Container contentArea = getContentPane();
ClockPanel timeDisplay = new ClockPanel();


contentArea.add(timeDisplay); //add components
setContentPane(contentArea);
start(); //start thread running

}


class ClockPanel extends JPanel
{
public void paintComponent(Graphics painter )
{
Image pic =
Toolkit.getDefaultToolkit().getImage("background.jpg");

if(pic != null)

painter.drawImage(pic, 0, 0, this); //create image


//if I didn't use a background image I would have used the setColor and fillRect methods to set background

painter.setFont(clockFont); //create clock components
painter.setColor(Color.black);
painter.drawString( timeNow(), 60, 40);


}
}


//get current time
public String timeNow()
{
Calendar now = Calendar.getInstance();
int hrs = now.get(Calendar.HOUR_OF_DAY);
int min = now.get(Calendar.MINUTE);
int sec = now.get(Calendar.SECOND);

String time = zero(hrs)+":"+zero(min)+":"+zero(sec);

return time;
}



public String zero(int num)
{
String number=( num < 10) ? ("0"+num) : (""+num);
return number; //Add leading zero if needed

}


public void start()
{
if(runner == null) runner = new Thread(this);
runner.start();
//method to start thread
}


public void run()
{
while (runner == Thread.currentThread() )
{
repaint();
//define thread task
try
{
Thread.sleep(1000);
}
catch(InterruptedException e)
{
System.out.println("Thread failed");
}

}
}

//create main method
public static void main(String [] args)
{
Clock eg = new Clock();
}
}

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