executorservice

问题 I\'m looking for an ExecutorService implementation that can be provided with a timeout. Tasks that are submitted to the ExecutorService are interrupted if they take longer than the timeout to run. Implementing such a beast isn\'t such a difficult task, but I\'m wondering if anybody knows of an existing implementation. Here\'s what I came up with based on some of the discussion below. Any comments? import java.util.List; import java.util.concurrent.*; public class TimeoutThreadPoolExecutor

问题 I need to execute some amount of tasks 4 at a time, something like this: ExecutorService taskExecutor = Executors.newFixedThreadPool(4); while(...) { taskExecutor.execute(new MyTask()); } //...wait for completion somehow How can I get notified once all of them are complete? For now I can\'t think about anything better than setting some global task counter and decrease it at the end of every task, then monitor in infinite loop this counter to become 0; or get a list of Futures and in infinite

问题 I have code where I schedule a task using java.util.Timer . I was looking around and saw ExecutorService can do the same. So this question here, have you used Timer and ExecutorService to schedule tasks, what is the benefit of one using over another? Also wanted to check if anyone had used the Timer class and ran into any issues which the ExecutorService solved for them. 回答1: According to Java Concurrency in Practice: Timer can be sensitive to changes in the system clock,