Java thread monitoring, thread restart, observer mode issues

Question

I read about the issue of thread monitoring restart
http://www.cnblogs.com/ae6623...
The observer mode introduced in this article I think is the key code for restarting the thread Put it in the catch block in the thread body. What should I do if it is an uncaught exception? I don’t know much about the Exception class. Can all exceptions be caught? If so, will there be any missed reasons for thread death? It can’t be monitored

Answer 1

Exception是所有异常类的父类, catch(Exception)Can catch all exceptions

Usually abnormalities are divided into Exception和RuntimeException

Business in

• Exception必须捕获, 发生异常时, 会执行catch

• RuntimeException, 发生异常时, 如果不捕获会中断当前线程, 如果捕获和Exception same

General conditions for thread exit (death)

• Thread business execution completed

• Uncaught thread occurredRuntimeException

The essence of restarting the thread in the article you gave is that if the previous thread A已经结束了(break), 调用Observable#notifyObservers()重新启动了一个线程A1,也就是说如果没有调用Observable#notifyObservers() is used, the thread will not be restarted.

So, if Observable#notifyObservers()之前发生了RuntimeException occurs before calling Observable#notifyObservers(), and it is not caught, the thread will not be restarted.

Answer 2

Generally, the location where the observed thread exception occurs can be determined, the exception is caught at the determined location and the thread is restarted. The subject connection method is feasible.