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8176499: Dependence on java.util.Timer freezes screen when OS time resets backwards #117

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Just for now

@@ -26,13 +26,16 @@

import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

* Monocle implementation class for Timer.
final class MonocleTimer extends Timer {
private static java.util.Timer timer;
private java.util.TimerTask task;
private static ScheduledThreadPoolExecutor scheduler;
private ScheduledFuture<?> task;

MonocleTimer(final Runnable runnable) {
@@ -47,19 +50,11 @@ static int getMaxPeriod_impl() {

@Override protected long _start(final Runnable runnable, int period) {
if (timer == null) {
timer = new java.util.Timer(true);
if (scheduler == null) {
scheduler = new ScheduledThreadPoolExecutor(1);

task = new java.util.TimerTask() {

public void run() {;

timer.schedule(task, 0, (long)period);
task = scheduler.scheduleAtFixedRate(runnable, 0, period, TimeUnit.MILLISECONDS);
return 1; // need something non-zero to denote success.

@@ -69,7 +64,7 @@ public void run() {

@Override protected void _stop(long timer) {
if (task != null) {
task = null;
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