I want to start several callable threads in the same time(in loop), and want to return some information from everyone in main thread. How to realise this?
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I want to start several callable threads in the same time(in loop), and want to return some information from everyone in main thread. How to realise this?
It’s impossible to say the best approach from your question, because we know nothing about the use case! But generally speaking you could create a thread pool using
Executors.newFixedThreadPool(), then submit genericCallable<T>objects to the thread pool – you’ll get back aFuture<T>.In the main thread, you can then loop over the futures, calling each one of the
get()methods which will block until the corresponding callable has finished execution in the thread pool.