新的Runnable和Runnable类型的功能接口有什么区别？

Question

当我创建带有Observable的lambda的Runnable时，代码将按计划执行run方法。但是，如果我创建一个新的Runnable，则代码不会执行该计划，则什么都不会发生？

获取和使用Runnable

的代码

Observable<Usage> usageObservable = Observable.create(emitter -> {
  ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);

  executorService.scheduleAtFixedRate(createNewUsageListener(emitter), 0, 2, TimeUnit.SECONDS);

});

ConnectableObservable<Usage> connectableObservable = usageObservable.share().publish();

connectableObservable.connect();

按ScheduledExecutorService时间表工作和执行的代码。

private Runnable createNewUsageListener(ObservableEmitter<Usage> emitter) {
  return () -> {
    List<Usage> usages = getUpdates(rollDice(0, 5));
    if (usages != null) {
      emitUsageStats(emitter, usages);
    }
  };
}

此代码对我来说似乎是相同的代码，但是不会在ScheduledExecutorService

中执行

private Runnable createNewUsageListener(ObservableEmitter<Usage> emitter) {
  return new Runnable() {
    @Override
    public void run() {
      List<Usage> usages = getUpdates(rollDice(0, 5));
      if (usages != null) {
        emitUsageStats(emitter, usages);
      }
    }
  };
}