How to wait for a queue to contain elements?

I'm trying to implement a FIFO observer/observable decoupling queue, but I am not sure how to get a method to wait until a queue is not empty before returning. Here's is my current attempt but I'm sure there must a more elegant solution. ``` /* * Waits until there is data, then returns it. */ private Double[] get() { while (queue.isEmpty()) { try { Thread.sleep(1); } catch (InterruptedException e) { // Don't care. } } return queue.removeFirst(); } ```