問題描述
我想知道是否有人可以指出我在 java 中的一個簡單等效的 python 多處理模塊.
I was wondering if somebody could point me to a simple equivalent of python's multiprocessing module in java.
我有一個簡單的并行處理場景(其中沒有 2 個進程交互):獲取一個數據集并將其拆分為 12 個并將 java 方法應用于 12 個數據集，收集結果并將它們加入某種列表中相同的順序.
I have a simple parallel processing scenario (where no 2 processes interact): Take a data set and split it into 12 and apply a java method to the 12 datasets, collect results and join them in a list of some sort with the same ordering.
作為專業"語言的 Java 似乎有多個庫和方法 - 誰能幫助這個 Java 新手入門?
Java being a "pro" language appears to have multiple libraries and methods - anyone who can help this java newbie get started?
我想用最少的代碼來做這件事 - 正如我所說的，我的要求非常簡單.
I would like to do this with minimal of coding - as i said my requirement is pretty straightforward.
更新:如何在 java 中進行多處理，以及預計速度會提高多少?
這似乎表明線程是要走的路.我希望我別無選擇，只能涉入一堆船閘(雙關語無意)并等待我的船航行.盡管如此，還是歡迎簡單的例子.
This seems to indicate threads is the way to go. I expect I have no choice but wade into a bunch of locks (pun unintended) and wait for my ship to sail. Simple examples are welcome nevertheless.
推薦答案
沒有完全兼容的類，但是 ExecutorService 為您提供實現它所需的一切.
There's no exactly-compatible class, but ExecutorService gives you everything you need to implement it.
特別是，沒有將 Callable 映射到 Collection 并等待結果的函數，但您可以輕松構建 Collection<Callable<T>> 出 Callable<T> 和 CollectioninvokeAll，它會返回一個列表<未來<T>>.
In particular, there's no function to map a Callable over a Collection and wait on the results, but you can easily build a Collection<Callable<T>> out of a Callable<T> and Collection<T>, then just call invokeAll, which returns you a List<Future<T>>.
(如果您想模擬 multiprocessing.Pool 中的一些其他函數，則需要循環 submit 并構建自己的等待集合開.但是map很簡單.)
(If you want to emulate some of the other functions from multiprocessing.Pool, you will need to loop around submit instead and build your own collection of things to wait on. But map is simple.)
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