Which one is the better thread implemented

[Margaret]

Which one is the better thread implemented thread or extended ?

[akp.mca]

Implementing runable interface is better than extending thread class.
In java we can extends only one class so there may be a situation where we have to extends a particular class and also have to maintain thread. There we have to extend the particular class and have to user implements runable interface.
so programming with implementing runable interface is the better programming practice.

[gauravkant]

1 another thing, by extending thread u r taking complete overhead of the thread class where as by implementing Runnable u are just registering ur class with thread, whenever u requird just call its start method and start enjoying wth thread