Suggestions for the FAQ

If Thread.currentThread() is called from within a Runnable, is the returned Thread the same Thread contains the Runnable or is it the Thread that declared the Runnable?

Maybe some code will help clarify. Given the following code:Final ArrayList<Thread> someThreads = new ArrayList<ArrayList>();

someThreads.add(Thread.currentThread());

Thread someStartedThread = new Thread(

new Runnable() {

public void run() {

someThreads.add(Thread.currentThread());

}

}

);

someStartedThread.start();

someStratedThread.join();

someThreads.add(someStartedThread);

Which two Threads in the someThreads ArrayList are the same: the first two or the second two?

The above example code could also be used to explain order guarantees, like what someThreads would contain if the someStartedThread.join(); line was removed.

You know... after thinking about it I think i know the answer: the last two are the same, because if that Runnable was declared in its own file then that would be the only Thread available to Thread.currentThread() from that context.

Message was edited by:

MutantPlatypus

MutantPlatypus at 2007-7-7 13:10:20 >