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JUC第二十一讲：JUC线程池：ScheduledThreadPoolExecutor详解_程序员 jet_qi的博客-CSDN博客

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By long initialDelay, int heapIndex
| CSDN
JUC线程池：ScheduledThreadPoolExecutor详解 本文是JUC第二十一讲，JUC线程池: ScheduledThreadPoolExecutor详解。在很多业务场景中，我们可能需要周期性的运行某项任务来获取结果，比如周期数据统计，定时发送数据等。在并发包出现之前，Java 早在1.3就提供了 Timer 类(只需要了解，目前已渐渐被 ScheduledThreadPoolExecutor 代替)来适应这些业务场景。随着业务量的不断增大，我们可能需要多个工作线程运行任务来尽可能的增加产品性能，或者是需要更高的灵活性来控制和监控这些周期业务。这些都是 ScheduledThreadPoolExecutor 诞生的必然性。 请带着这些问题继续后文，会很大程度上帮助你更好的理解ScheduledThreadPoolExecutor。 ScheduledThreadPoolExecutor要解决什么样的问题? 定时任务 ScheduledThreadPoolExecutor相比ThreadPoolExecutor有哪些特性?
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