how high-priority thread allow other thread

[rameshkr]

What must a high-priority thread do when it needs to perform a critical operation once every five seconds, but which still allows other threads to get CPU time?
Choice 1
Reduce its priority using the setPriority() method.
Choice 2
Use the Thread.sleep() method to relinquish control of the CPU.
Choice 3
Add all the other threads into its own ThreadGroup.
Choice 4
Use the notifyAll() method to increase priority of other threads.
Choice 5
Put its critical code in a Timer object.

[Norm]

Have you written a test program to see what happens?

[Niveditha]

Suggestion given by Norm is the best one.
Write a simple program with 4-5 simple threads, implement all your ways and check which would best suite.

I prefer choice2, not sure check it out.

[Nicholas Jordan]

Timer object probably best, but as the other two posts suggest, only testing show true result.