does yield prevent thread execution?

[Pramila Chinguru]

Which of the following will definitely stop a thread from executing
1. wait
2. notify
3.yield
4.suspend
5.sleep


Ans: 1 3 4 5


Does yield definitely stop executing? Incase there are no high priority threads in ready state, the same thread continues to run. how is yield a correct answer to this question?

[Swapnil Trivedi]

Hi pramila:
Actually whenever there are equal priority thread then the running thread can volunteerally leave the running state. Hence, it stops its execution.But this behaviour of yield() method is not guarenteed...

I hope it helps...


Regards
Swapnil
[ June 23, 2006: Message edited by: Swapnil Trivedi ]

[Keith Lynn]

This is from the API.

yield

public static void yield()

Causes the currently executing thread object to temporarily pause and allow other threads to execute.

[Swapnil Trivedi]

Hi:
I am sorry for my last post..But I too am confused about this yield() method. I have one Question from Enthuware database that says that
"yield() does not necessarily put the calling thread on hold."

The Question was:

In which of the following cases a thread will definitely be alive but not running??
1. The thread has called wait().
2. The thread has issued sleep()
3. The thread calls yield()
4. A higher priority thread comes in ready to run state.
5. The thread is trying to enter a synchronized block and the monitor is not free.


Answer are: 1, 2 and 5

According to this concept the yield() does not stop execution. But according to Pramila's Question yield() definitely stops execution.

Can anybody explain....Thanks

Regards
Swapnil