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Thread vs Runnable

vijay kumar
Ranch Hand

Joined: Nov 05, 2005
Posts: 58
Is there any other differences between Implementing Runnable interface and Thread class apart from OO opttion.
Saket Barve
Ranch Hand

Joined: Dec 19, 2002
Posts: 229
Functionality wise, no.
William Brogden
Author and all-around good cowpoke

Joined: Mar 22, 2000
Posts: 13027
If you extend Thread, each instance will automatically have a reference in a ThreadGroup - this has some implications for locating instances of your class and other stuff. See the java.lang.ThreadGroup JavaDocs.
Jeff Albertson
Ranch Hand

Joined: Sep 16, 2005
Posts: 1780
It's been noted many times that it was probably a mistake for Thread to
implement Runnable: it confuses the task with the worker. Since one
almost never overrides Thread methods other than run, keep it simple
and implement Runnable and then use Thread without subclassing:
How bad is it that Thread implements Runnable? At another Java site,
I saw some nasty code where someone tried to "restart" a thread like

There is no emoticon for what I am feeling!
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24195

Moving to "Threads and Synchronization."

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Adeel Ansari
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Joined: Aug 15, 2004
Posts: 2874
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