ListenableFuture<?> future;
    ScheduledFuture<?> delegateFuture;

    Runnable runnable =
        new Runnable() {
          @Override
          public void run() {}
        };

    future = service.schedule(runnable, 5, MINUTES);
    future.cancel(true);
    assertTrue(future.isCancelled());
    delegateFuture = (ScheduledFuture<?>) delegateQueue.element();

    ListenableFuture<?> future;
    ScheduledFuture<?> delegateFuture;

    Runnable runnable =
        new Runnable() {
          @Override
          public void run() {}
        };

    future = service.schedule(runnable, 5, MINUTES);
    future.cancel(true);
    assertTrue(future.isCancelled());
    delegateFuture = (ScheduledFuture<?>) delegateQueue.element();

      public ListenableScheduledTask(
          ListenableFuture<V> listenableDelegate, ScheduledFuture<?> scheduledDelegate) {
        super(listenableDelegate);
        this.scheduledDelegate = scheduledDelegate;
      }

      @Override
      public boolean cancel(boolean mayInterruptIfRunning) {
        boolean cancelled = super.cancel(mayInterruptIfRunning);
        if (cancelled) {

import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.locks.ReentrantLock;
import java.util.logging.Level;