Synchronising twice on the same object?

Question

I was wondering if in Java I would get any odd behaviour if I synchronise twice on the same object?

The scenario is as follows

pulbic class SillyClas         


        

Answer 1

No problems. In your example, (once you fix your code to get rid of the compile warnings that you'll get ;) ), the synchronization ensures that the blocks in method1 and method2 will not execute simultaneously.

That's kind of the point of synchronization. :)

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Edit: Sorry, missed parts of your question, but Phill answered it. To summarize, a single thread cannot deadlock itself.