有谁知道 java.util.concurrent 包中的以下 java 方法 ScheduledExecutorService.html#scheduleAtFixedRate()
绝对保证，如果“最后一次”运行的可运行对象尚未完成，则 Runnable 计划永远不会并行运行:
例如(伪代码)
1.00 o'clock: scheduleAtFixedRate(MyRunnable, "Run ever Hour")`
//1.30 o'clock: MyRunnable Has finished (everthing is fine)
2.00 o'clock: MyRunnable is triggered to run again
3.00 o'clock: MyRunnable has NOT yet finished ==> What will happen here?
Will java Simply SKIP the starting of MyRunnable (as the old instance has not yet
finished) and try again at 4 o'clock or will Java start a NEW MyRunnable that then will
run in parallel to the "old" MyRunnable.
非常感谢 简
最佳答案
来自docs :
If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.
关于Java 计划执行器 : Does it guarantee to not run in parallel if task hast not yet finished，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/1632371/