JAVA Executing stack of threads by n

Question

maybe someone could recommend some good examples concerning thread executions, thread management. Maybe not only examples but article, tutorial if you will with examples.

Generally I have a problem where I need to download a bunch of files from the web, but connection is limited to two. So when I gather up all the url's to files I need, I'd like to download say... 100 files but do so in async manner by two until all the threads finish their job.

Thank, you for support.

Answer 1

An ExecutorService should take care of thread management for you.

final int POOL_SIZE = 2;
final ExecutorService pool = Executors.newFixedThreadPool(POOL_SIZE);

you can then call the submit method to execute runnable tasks

Answer 2

使用使用大小为2的固定线程池的ExecutorService ，然后将所有任务提交到该ExecutorService 。

Answer 3

我认为ThreadPoolExecutor应该可以为您提供帮助，在java.util.concurrent。*中有很多此类轮询的实现。

Answer 4

I don't have an article, but I do know of a good book that covers general multi-threaded programming using Java. It is called Java Concurrency in Practice. It does cover general usage patterns, etc.