The thread created with newSingleThreadExecutor a newly created thread or a deamon thread?
<p>want to the type of the thread created by newSingleThreadExecutor. <a href="http://download.oracle.com/javase/1.5.0/docs/guide/concurrency/overview.html" rel="nofollow">http://download.oracle.com/javase/1.5.0/docs/guide/concurrency/overview.html</a> shows we can create thread 
in a single background thread (as with events in Swing) or in a newly created thread. But how to control?</p>
