Java 线程不可重新启动.对于您想要实现的目标，您可以每次创建一个新线程，或者您可以查看 ExecutorService.只需创建一个单线程执行程序 (Executors.newSingleThreadExecutor)，并在每次需要运行时将可运行对象提交给它.

Java threads are not restartable. For what you are trying to achieve, you could create a new thread each time, or you could look at an ExecutorService. Just create a single threaded executor (Executors.newSingleThreadExecutor), and submit your runnable to it every time you need it to run.

ExecutorService executor = Executors.newSingleThreadExecutor();
executor.submit(runnable);