Thread1 is a periodic thread (extends WatchedPeriodicThread) that runs for 10 iterations and then dies because of an "unexpected" exception.

Thread1 是一个周期性线程（扩展 WatchedPeriodicThread），运行 10 个迭代后由于 “意外” 异常而终止。

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This constructor lets you specify the priority, memory sizes, and period for a thread, along with the class that represents the thread to be run (a class that extends PeriodicThread).

此构造函数让您能够指定优先级、内存大小、线程周期和表示要运行的线程的类(扩展periodicthread的类)。

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Thread2 is a simple periodic thread (extends WatchedPeriodicThread) that continues to run forever.

Thread2是一个简单的周期性线程(扩展WatchedPeriodicThread)，它会一直运行下去。

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