This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Quote from Joshua Bloch: Thread groups are best viewed as an unsuccessful experiment, and you may simply ignore their existence."
However, I'm sure that when implementing java.util.concurrent.Executors method defaultThreadFactory(). The factory creates all new threads by an Executor in the same ThreadGroup, so there seems to be different signals coming from Sun.
[ October 19, 2004: Message edited by: Nigel Browne ]