J2MEFixedRateSchedule.java Source code

Introduction

Here is the source code for J2MEFixedRateSchedule.java

Source

import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;

public class J2MEFixedRateSchedule extends MIDlet {

    private Timer aTimer;

    private ClockTimerTask aTimerTask;

    Displayable d = new ClockCanvas();

    private Date currentTime = new Date();

    private Calendar now = Calendar.getInstance();

    private String nowString = "";

    public void startApp() {
        d.addCommand(new Command("Exit", Command.EXIT, 0));
        d.setCommandListener(new CommandListener() {
            public void commandAction(Command c, Displayable s) {
                notifyDestroyed();
            }
        });
        now.setTime(currentTime);

        nowString = now.get(Calendar.HOUR) + ":" + now.get(Calendar.MINUTE) + ":" + now.get(Calendar.SECOND) + ":";

        aTimer = new Timer();
        aTimerTask = new ClockTimerTask();
        aTimer.scheduleAtFixedRate(aTimerTask, 10, 1000);

        Display.getDisplay(this).setCurrent(d);
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    class ClockCanvas extends Canvas {
        public void paint(Graphics g) {
            int width = getWidth();
            int height = getHeight();

            g.setGrayScale(255);
            g.fillRect(0, 0, width - 1, height - 1);
            g.setGrayScale(0);
            g.drawRect(0, 0, width - 1, height - 1);

            g.drawString(nowString, 10, 10, Graphics.TOP | Graphics.LEFT);

        }
    }

    class ClockTimerTask extends TimerTask {
        public final void run() {
            currentTime = new Date();
            now = Calendar.getInstance();
            now.setTime(currentTime);

            nowString = now.get(Calendar.HOUR) + ":" + now.get(Calendar.MINUTE) + ":" + now.get(Calendar.SECOND)
                    + ":";

            ((ClockCanvas) d).repaint();
        }
    }
}