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Synchronizing on main method arguments

 
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In the code below, in the main method I am synchronizing on the String array parameter of the main method. The code gives an IllegalMonitorStateException when trying to call wait on commented line.



I know that a thread has to be owner of the object on which it is synchronizing but in this case I am unable to figure out the reason of this exception as to how main thread is not the owner of the array.
Probably I could not understand the conditions as to when a thread owns an object's lock. Please clarify.
 
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"Being the owner" means "owning the synchronization lock" in this case. So you can only call wait() on an object inside a block synchronized on that object.

Here you synchronize on args, but you call wait() on e. The thread doesn't have a lock on e.
 
ujjawal rohra
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Ohh yes I missed that the object on which wait is called should be the same on which the block is synchronized.

Thanks Matthew .
 
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