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Thread issue

Aurelian Dobre
Greenhorn

Joined: Mar 10, 2013
Posts: 1
Hi,

Why the following code doesn't block in the wait() method forever?

Henry Wong
author
Sheriff

Joined: Sep 28, 2004
Posts: 20029
    
  44

Aurelian Dobre wrote:Hi,

Why the following code doesn't block in the wait() method forever?




This issue seems to come up often -- and the quick answer is... The implementation of one of the components of the threading system (in this case, to support the join() method call), uses the wait/notify mechanism. And for some reason, the designer chose to use the thread object as the notification object. This is purely an implementation detail, and hence, may change in the future.

Regardless, don't perform wait() on the thread object, some part of the threading library is already doing that.

Henry



Books: Java Threads, 3rd Edition, Jini in a Nutshell, and Java Gems (contributor)
 
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