This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Hi all, What is default Thread priority (Note that I am not talking abt. NORM_PRIORITY) ? J@Whiz says:The range of Thread priority in java is 1-10. The minimum priority is 1 and the maximum is 10. The default priority of any thread in java is 5. JQPLUS says that it is not allways but most of the time . Suppose, the q. is : What is the default priority of any thread in Java ? What will be the answer !!! wht. u say ? Ratul Banerjee.
jdk say's the default priority or normal priority of a thread is 5 which in any case u know's it.Now the thing to look at is when u create a child thread it get's the priority of a parent thread.Suposse u created a thread inside the main method, before creating a thread inside a main method u set the priority of your main to 10 then your chid thread will also get the same priority i.e 10.
Hi ratul..., first you must understand : Every thread instance is a member of exactly one ThreadGroup, A ThreadGroup can have both threads and other thread groups. for example : When a java application is started, the JVM creates the main ThreadGroup as a member of the system ThreadGroup. By Default, all new-user created threads will become the member of this main ThreadGroup UNLESS another ThreadGroup is passed as the first argument of the new statement's constructor method. see below : ########## ThreadGroup anotherTG = new ThreadGroup("MyThreadGroup"); anotherTG.getMaxPriority(); //will return 10 note: Every ThreadGroup has a Maximum Priority (10). anotherTG.setMaxPriority(7); //set the max priority to 7 ########## Thread X = new Thread(anotherTG, "MyThread"); note: this become a member of anotherTG NOT main ThreadGroup. if you use method X.getPriority(), by default JVM will always give you 5, you see not 7. ########## supposse you want to change the priority of X, you can use setPriority() method : X.setPriority(number); note: the number MUST be a legal range 1-10, if number is larger than the Maximum Priority of anotherTG = 7, 7 will be used as a priority. ########## So if you create thread on main(), you will get the priority of main ThreadGroup. (that is 5). hope that helps stevie
Joined: Mar 15, 2001
Hi Nitin and Stevie, MANY MANY THANKS FOR UR EXPLANATION. Ratul
As other have explained, the right answer to you question is, the default priority of a thread is same as the priority of the thread that created this thread. So you cannot say whether it is 0 1 5 or 10 or NORM_PRIORITY. -Paul. ------------------ Get Certified, Guaranteed! (Now Revised for the new Pattern) www.enthuware.com/jqplus