Daemon Thread

anitha.s · 06-11-06, 05:18 PM

What is the use of Daemon Theard?
How can we convert a thread to Daemon Thread?
Give example to Daemon Thread?

abeethabsl · 07-12-06, 08:21 PM

Hi,

In java we have two type of Threads : Daemon Thread and User Threads. Generally all threads created by programmer are user thread (unless you specify it to be daemon or your parent thread is a daemon thread). User thread are generally meant to run our programm code. JVM doesn't terminates unless all the user thread terminate.
On the other hand we have Daemon threads. Typically these threads are service provider threads. They should not be used to run your program code but some system code. These thread run paralley to your code but survive on the mercy of the JVM. When JVM finds no user threads it stops and all daemon thread terminate instantly. Thus one should never rely on daemon code to perform any program code.
For better understanding consider a well known example of Daemon thread : Java garbage collector. Garbage collector runs as a daemon thread to recalim any unused memory. When all user threads terminates, JVM may stop and garbage collector also terminates instantly.

Regards,
Abeetha.M

jasmine84 · 07-12-06, 11:25 PM

Daemon threads are service providers for othet threads or objects.a daemon thread executes continously.It generally provides a background processing.

to make a thread as daemon thread

t.setDaemon(true);

to know if a thread is a daemon or not

boolean x=t.isDaemon();

anitha.s · 13-12-06, 12:54 PM

Thank you jasmine and abeeth

06-11-06, 05:18 PM	#1 (permalink)
anitha.s Junior Member Join Date: Feb 2006 Location: Posts: 58 Thanks: 0 Thanked 4 Times in 4 Posts Thanks: 0 Thanked 4 Times in 4 Posts Rep Power: 3	Daemon Thread What is the use of Daemon Theard? How can we convert a thread to Daemon Thread? Give example to Daemon Thread?

07-12-06, 08:21 PM	#2 (permalink)
abeethabsl Senior Member Join Date: Dec 2006 Posts: 698 Thanks: 3 Thanked 15 Times in 12 Posts Thanks: 3 Thanked 15 Times in 12 Posts Rep Power: 10	Re: Daemon Thread Hi, In java we have two type of Threads : Daemon Thread and User Threads. Generally all threads created by programmer are user thread (unless you specify it to be daemon or your parent thread is a daemon thread). User thread are generally meant to run our programm code. JVM doesn't terminates unless all the user thread terminate. On the other hand we have Daemon threads. Typically these threads are service provider threads. They should not be used to run your program code but some system code. These thread run paralley to your code but survive on the mercy of the JVM. When JVM finds no user threads it stops and all daemon thread terminate instantly. Thus one should never rely on daemon code to perform any program code. For better understanding consider a well known example of Daemon thread : Java garbage collector. Garbage collector runs as a daemon thread to recalim any unused memory. When all user threads terminates, JVM may stop and garbage collector also terminates instantly. Regards, Abeetha.M

07-12-06, 11:25 PM	#3 (permalink)
jasmine84 Senior Member Join Date: Oct 2006 Posts: 426 Thanks: 10 Thanked 29 Times in 25 Posts Thanks: 10 Thanked 29 Times in 25 Posts Rep Power: 12	Re: Daemon Thread Daemon threads are service providers for othet threads or objects.a daemon thread executes continously.It generally provides a background processing. to make a thread as daemon thread t.setDaemon(true); to know if a thread is a daemon or not boolean x=t.isDaemon();

13-12-06, 12:54 PM	#4 (permalink)
anitha.s Junior Member Join Date: Feb 2006 Location: Posts: 58 Thanks: 0 Thanked 4 Times in 4 Posts Thanks: 0 Thanked 4 Times in 4 Posts Rep Power: 3	Re: Daemon Thread Thank you jasmine and abeeth

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