A JAVA TIMER SAMPLE

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This little java applet ... will just show the local time ...

This is the HTML portion :

<p>
<center>
The current time :
<APPLET CODE=TimerClass.class WIDTH=90 HEIGHT=20>
<param name=MODE value="1">
<param name=background value="eeeeee">
<param name=foreground value="000000">
</APPLET>
</center>
</p>

This the TimerClass.java source

 
// © 2001-2003, Sergey Zaytsev, All Rights Reserved

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

// 1 day = 86,400 regular seconds = 100,000 digital seconds (deconds)
// 864 regular milliseconds = 1000 digital milliseconds (millideconds)
public class TimerClass extends Applet
    implements Runnable
{
    Thread timer;
    int Mode = 1;         // 1 - regular time, 2 - digital time
    int SleepMS;  // sleep milliseconds
    int y;
    int x;
    public void init()
    {
                   String strMode = getParameter("MODE");
                   if (strMode != null)
                             Mode = Integer.parseInt(strMode);

                   SleepMS = (Mode == 1) ? 1000 : 864;

                   String strBackGround = getParameter("background");

                   if (strBackGround != null)
                             this.setBackground(stringToColor(strBackGround));

                   String strForeGround = getParameter("foreground");
                   if (strForeGround != null)
                             this.setForeground(stringToColor(strForeGround));

                   String strFontName = getParameter("FONTNAME");
                   if (strFontName == null)
                             strFontName = this.getFont().getName();

                   int intFontSize = this.getFont().getSize();

                   String strFontSize = getParameter("FONTSIZE");

                   if (strFontSize != null)
                             intFontSize = Integer.parseInt(strFontSize);

                   int intFontStyle = this.getFont().getStyle();

                   String strFontStyle = getParameter("FONTSTYLE");

                   if (strFontStyle != null)
                             intFontStyle = Integer.parseInt(strFontStyle);

                   // Set font              
                   this.setFont(new Font(strFontName, intFontStyle, intFontSize));

                   y = this.size().height / 2 + intFontSize / 2;

                   FontMetrics fm = getFontMetrics(this.getFont());

                   x = this.size().width / 2 - fm.stringWidth((Mode == 1) ? "00:00:00 AM" : "00:00:00") / 2;

    }

    public void paint(Graphics screen) 
    {
                   Calendar now = Calendar.getInstance();
                   int intHour = now.get(Calendar.HOUR);
                   int intHourOfDay = now.get(Calendar.HOUR_OF_DAY);
                   int intAM_PM = now.get(Calendar.AM_PM);
                   int intMinute = now.get(Calendar.MINUTE);
                   int intSecond = now.get(Calendar.SECOND);
                   String strShow;

                   if (Mode == 1)
                             strShow = FormatTime(intHour, intMinute, intSecond, intAM_PM);
                   else
                   {
                             int intMilliSecond = now.get(Calendar.MILLISECOND);
                             int intMilliSecondOfDay = ((intHourOfDay * 60 + intMinute) * 60 + intSecond) * 1000 +
                                                                                        intMilliSecond;

                             int intDecondOfDay = intMilliSecondOfDay / 864;

                             int intDour = intDecondOfDay / 10000;

                             int intDinute = (intDecondOfDay - (intDour * 10000)) / 100;

                             int intDecond = intDecondOfDay % 100;

                             strShow = FormatDime(intDour, intDinute, intDecond);

                   }

                   screen.drawString(strShow, x, y);
    }

    public void start() 
    {
        if (timer == null)
        {
            timer = new Thread(this);
            timer.start();
        }
    }

    public void run()
    {
        while (true)
        {
            repaint();
            try { Thread.sleep(SleepMS); }
            catch (InterruptedException e) { }
        }
    }

    public void stop() 
    {
        if (timer != null) 
        {
            timer.stop();
            timer = null;
        }
    }

    public String FormatTime(int intHour, int intMinute, int intSecond, int intAM_PM)
    {
                if ((intHour == 0) && (intAM_PM == 1) /* PM */)
                intHour = 12;
        
                String strTime = "";
        if (intHour < 10)
                strTime = "0";
        strTime += intHour + ":";
        if (intMinute < 10)
                strTime += "0";
        strTime += intMinute + ":";
        if (intSecond < 10)
                strTime += "0";
        strTime += intSecond + " " + ((intAM_PM == 0) ? "AM" : "PM");

        return strTime;
    }

    public String FormatDime(int intDour, int intDinute, int intDecond)
    {
                   String strDime = "0" + intDour + ".";
                   if (intDinute < 10)
                             strDime += "0";

                   strDime += intDinute + ".";
                   if (intDecond < 10)
                             strDime += "0";

                   strDime += intDecond;

                   return strDime;
    }

          // Converts a string formatted as "rrggbb" to an awt.Color object
          private Color stringToColor(String paramValue)
          {
                   return new Color(Integer.decode("0x" + paramValue).intValue());
          }
          // External interface used by design tools to show properties of an applet.
          public String[][] getParameterInfo()
          {
                   String[][] info =
                   {
                             { "background", "String", "Background color, format \"rrggbb\"" },
                             { "foreground", "String", "Foreground color, format \"rrggbb\"" },
                             { "fontname", "String", "Font Name" },
                             { "fontsize", "int", "Font Size" },
                             { "fontstyle", "int", "Font Style" },
                             { "mode", "int", "1 - Regular Time; 2 - Decimal Time" }
                   };
                   return info;
          }

}
 
// eof

Simple huh? Of course, this 'java' source must be compiled (javac), to build the 'class' BYTECODE, to be uploaded to the web site ...

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