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Tony reedy
Greenhorn

Joined: Jan 11, 2002
Posts: 21
Hi all,
This is discussed previously,but I am confused with the choice c.
what's answer for the following question?
ThreadGroup class instances:
a) Allow threads to be manipulated as a group
b) Provide support for ThreadDeath listeners
c) May contain other ThreadGroups
d) Must contain threads of the same type

the explanations says
c) May contain other ThreadGroups
Nope.

Thread group is the highest level of aggregation of individual threads. Java doesn't support ( as far as I know ) groups of groups.
But I extracted from de API documentation:
A thread group represents a set of threads. In addition, a thread group can also include other thread groups.

I feel both statements are contradicting.
Is the answer yes or no
Rajinder Yadav
Ranch Hand

Joined: Jan 18, 2002
Posts: 178
Sure you can have a ThreadGroup contain another ThreadGroup, it makes perfect sense to control a 'smaller' group from a larger one
The JDK explanation is correct.
[ March 06, 2002: Message edited by: Rajinder Yadav ]

<a href="http://www.rajindery.com" target="_blank" rel="nofollow">Rajinder Yadav</a><p>Each problem that I solved became a rule which served afterwards to solve other problems. --Rene Descartes
 
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subject: Threads