Wait until any of Future is done

Question

I have few asynchronous tasks running and I need to wait until at least one of them is finished (in the future probably I\'ll need to wait util M out of N tasks are finished). C

Answer 1

If you can use CompletableFutures instead then there is CompletableFuture.anyOf that does what you want, just call join on the result:

CompletableFuture.anyOf(futures).join()

You can use CompletableFutures with executors by calling the CompletableFuture.supplyAsync or runAsync methods.