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user threads and daemon threads  RSS feed

 
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Hi Folks,

Please tell tell me whats the difference between user threads and daemon threads technically..? What I have discovered that A daemon thread is simply a background thread that is subordinate to the thread that creates it, so when the thread that created it ends, the daemon thread dies with it...!
 
Saral Saxena
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Hi fOLKS,

Please advise on that ..!!
 
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Saral Saxena wrote: What I have discovered that A daemon thread is simply a background thread that is subordinate to the thread that creates it, so when the thread that created it ends, the daemon thread dies with it...!



Almost..... It's more like Daemon threads serve User threads, when all the User threads terminates, the JVM exits. It is not possible to have a running program with nothing but Daemon threads.

Henry
 
Saral Saxena
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As the user threads have some priority do daemon threads also have priority..?
 
Henry Wong
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Saral Saxena wrote:As the user threads have some priority do daemon threads also have priority..?




User threads and Daemon threads are the same in every other way. The only thing to remember is that the JVM will exit if there is nothing but Daemon threads left.

Henry
 
Saral Saxena
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Hi Henry,
Thanks a lot for the explanation in java we can make the user thread to act as a daemon thread through method but is reverse is possible let say Can we make any daemon thread to act as a user thread..?
 
Henry Wong
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Saral Saxena wrote:
Thanks a lot for the explanation in java we can make the user thread to act as a daemon thread through method but is reverse is possible let say Can we make any daemon thread to act as a user thread..?




Not sure what you mean. There is no "user thread to act as a daemon thread" or "daemon thread to act as a user thread". A thread is either one or the other. It can be set with the setDaemon() method, and it must be done before the thread is started.

Henry
 
It is sorta covered in the JavaRanch Style Guide.
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