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Implementing Runnable vs. extending Thread
I am very much confused about the perfect answer in simple language for above question. In which scenario which is better and why. can anyone explain.
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2 Answers
The Executor classes talk in terms of Runnable, and for that reason alone I favour implementing the Runnable interface. You don't carry the baggage of having your code implicitly tied into a thread and frameworks can handle Runnables in whatever way they prefer.
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Use these simple rules:
1) If the main purpose of a class is to be a thread, then subclass Thread
2) If the main purpose of a class is not to be a thread (e.g.: a GUI component), implement Runnable
3) Use Runnable when the thread class is already sub-classed by another class
