JavaFX stopwatch timer

Question

This is a class for a simple stopwatch for JavaFX, style the Label object as desired

package aaa;

import java.text.SimpleDateFormat;
import java.util.Date;
import javafx.beans.property.SimpleStringProperty;

/**
 *
 * @author D07114915
 */
public class KTimer extends Thread {

private Thread thread = null;
private SimpleDateFormat sdf = new SimpleDateFormat("mm:ss:S");
private String[] split;
private SimpleStringProperty min, sec, millis, sspTime;
private long time;

public static void main(String[] args) {
    KTimer t = new KTimer();
    t.startTimer(00);
}

public KTimer() {
    min = new SimpleStringProperty("00");
    sec = new SimpleStringProperty("00");
    millis = new SimpleStringProperty("00");
    sspTime = new SimpleStringProperty("00:00:00");
}

public void startTimer(long time) {
    this.time = time;
    thread = new Thread(this);
    thread.setPriority(Thread.MIN_PRIORITY);
    thread.start();
}

public void stopTimer(long time) {
    if (thread != null) {
        thread.interrupt();
    }
    this.time = time;
    setTime(time);
}

public void setTime(long time) {
    this.time = time;
    split = sdf.format(new Date(time)).split(":");
    min.set(split[0]);
    sec.set(split[1]);

    if (split[2].length() == 1) {
        split[2] = "0" + split[2];
    }
    millis.set(split[2].substring(0, 2));

    sspTime.set(min.get() + ":" + sec.get() + ":" + millis.get());
}

public long getTime() {
    return time;
}

public SimpleStringProperty getSspTime() {
    return sspTime;
}

@Override
public void run() {
    try {
        while (!thread.isInterrupted()) {
            setTime(time);
            sleep(10);
            time = time + 10;
        }
    } catch (Exception e) {
    }

}
}//end of class

Now just get a listener on the property for your GUI

Add vars

    KTimer ktimer;
    Label timeLabel;

in your class initialize the vars

    //Clock
    ktimer = new KTimer();
    timeLabel = new Label(ktimer.getSspTime().get());
    ktimer.getSspTime().addListener(new InvalidationListener() {

        @Override
        public void invalidated(Observable observable) {
            timeLabel.setText(ktimer.getSspTime().get());
        }
    });

then call the method to start and stop wherever you need to

Stop and reset is

                ktimer.stopTimer(0);

Start and Pause timer is

               ktimer.startTimer(ktimer.getTime());

Any improvements appreciated as the class is a bit CPU hungry..., but you can adjust the run thread and setTime(time) functions to suit the application

Answer 1

Here's a slightly different version (maybe better) and I'm not sure the synchronized methods are really necessary

package aaa;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
import javafx.beans.property.SimpleStringProperty;

/**
 *
 * @author D07114915
 */
public class KTimer {

private SimpleDateFormat sdf = new SimpleDateFormat("mm:ss:S");
private String[] split;
private SimpleStringProperty sspTime;
private long time;
private Timer t = new Timer("Metronome", true);
private TimerTask tt;
boolean timing = false;

public KTimer() {
    sspTime = new SimpleStringProperty("00:00:00");
}

public void startTimer(final long time) {
    this.time = time;
    timing = true;
    tt = new TimerTask() {

        @Override
        public void run() {
            if (!timing) {
                try {
                    tt.cancel();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            } else {
                updateTime();
            }
        }
    };
    t.scheduleAtFixedRate(tt, 10, 10);
}

public synchronized void stopTimer() {
    timing = false;
}

public synchronized void updateTime() {
    this.time = this.time + 10;
    split = sdf.format(new Date(this.time)).split(":");
    sspTime.set(split[0] + ":" + split[1] + ":" + (split[2].length() == 1 ? "0" + split[2] : split[2].substring(0, 2)));
}

public synchronized void moveToTime(long time) {
    stopTimer();
    this.time = time;
    split = sdf.format(new Date(time)).split(":");
    sspTime.set(split[0] + ":" + split[1] + ":" + (split[2].length() == 1 ? "0" + split[2] : split[2].substring(0, 2)));
}

public synchronized long getTime() {
    return time;
}

public synchronized SimpleStringProperty getSspTime() {
    return sspTime;
}
}