Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems.
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在給定的條件下;寫(xiě)出正確使用對象鎖保護靜態(tài)或實(shí)例變量不會(huì )產(chǎn)生并發(fā)訪(fǎng)問(wèn)問(wèn)題的代碼.
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