Countdown Class (Java)

Countdown.java

/** 
 * Countdown Class (v1.2.5)
 * GoToLoop (2017/Aug/26)
 *
 * https://Forum.Processing.org/two/discussion/27733/
 * countdown-class-library-for-java-js-python
 *
 * https://Forum.Processing.org/two/discussion/23846/
 * time-delay-in-python-mode#Item_11
 *
 * https://Gist.GitHub.com/GoToLoop/ea4db8a8622e27541213da3c9a43ca21
 */

package gotoloop.countdown;

import java.util.Timer;
import java.util.TimerTask;

public class Countdown {
  protected static final Timer t = new Timer("Countdown");

  public TimerTask task;
  public int delay;
  public volatile boolean done = true;

  public Countdown() {
  }

  public Countdown(final int waitTime) { // milliseconds
    delay = Math.abs(waitTime);
  }

  @Override public String toString() {
    return "Delay: " + delay + "  -  Done: " + done;
  }

  public Countdown start() {
    if (task != null)  task.cancel();
    done = false;
    t.schedule(task = new Timeout(), delay);
    return this;
  }

  protected class Timeout extends TimerTask {
    @Override public void run() {
      done = true;
    }
  }
}

CountdownClass.pde

/** 
 * Countdown Class (v1.2.5)
 * GoToLoop (2017/Aug/26)
 *
 * Forum.Processing.org/two/discussion/27733/
 * countdown-class-library-for-java-js-python
 *
 * Forum.Processing.org/two/discussion/23846/
 * time-delay-in-python-mode#Item_11
 *
 * Gist.GitHub.com/GoToLoop/ea4db8a8622e27541213da3c9a43ca21
 */

import gotoloop.countdown.Countdown;

static final float SECS = 7.5;
static final int WAIT_TIME = (int) (SECS * 1000);

static final color WAITING_BG = PImage.BLUE_MASK | PImage.ALPHA_MASK;
static final color DONE_BG = PImage.RED_MASK | PImage.ALPHA_MASK;

static final String AWAIT = "Awaiting " + SECS;
static final String END = "Countdown Finished";

final Countdown countdown = new Countdown(WAIT_TIME);

void setup() {
  size(300, 180);
  smooth(3);
  frameRate(60);

  colorMode(RGB);
  fill(#FFFF00);

  textSize(0100);
  textAlign(CENTER, CENTER);

  final int m = millis(), t = m + WAIT_TIME;
  countdown.start();
  println(m, t, t - m, TAB, countdown);
}

void draw() {
  getSurface().setTitle(countdown.done? END : AWAIT);
  background(countdown.done? DONE_BG : WAITING_BG);

  final String txt = millis() + "\n" + frameCount;
  text(txt, width>>1, height>>1);
}