java statement execution in threads

Question

If thread is executing following statement (suppose value of x is 1) and sleeps at point 'Here' and some other thread changes value of x.(suppose to 10) what will be the output?

System.out.println(/Here/++x);

You may want to look at answers for [Synchronization and System.out.println](http://stackoverflow.com/questions/9459657/synchronization-and-system-out-println) post. — PM 77-1, Oct 28 '13 at 18:50
This depends on the declaration and actual reference of x in the context of every thread — MRalwasser, Oct 28 '13 at 18:54

score 0 · Answer 1 · answered Oct 28 '13 at 18:48

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If the thread running the System.out stops before it does any processing on the ++x and then the value of x is changed on another thread to 10, the printed statement will be whatever Here evaluates to, followed by 11.

answered Oct 28 '13 at 18:48

David says Reinstate Monica

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score 0 · Answer 2 · answered Oct 28 '13 at 18:48

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Which ever one comes first. But you should know that there is no way it could change if the command is being executed. Even if the system is multi-core it will first finish the command and then jump on to the next. Except if it calls a big function, which is a different topic.

answered Oct 28 '13 at 18:48

Sindorej

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What is your definition of "*big function*"? – PM 77-1 Oct 28 '13 at 18:50

java statement execution in threads

2 Answers2