A: t1 starts earlier, then t2.join() waits t2 to finished blocking the main thread. So after t2.join() there is high chance sList content is filled.
B: t1 and t2 does not blocks main thread so sList inside synchronized block might not have content. Also synchronized block is useless here since only main thread executes it.
C: same as B also yield() might be useless as well due to single main thread.
D: same as B, sList might not have content.
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unix105
3 weeks, 5 days ago