第226題

Which two statements are true? (Choose two.)
A. It is possible to synchronize static methods.
B. When a thread has yielded as a result of yield(), it releases its locks.
C. When a thread is sleeping as a result of sleep(), it releases its locks.
D. The Object.wait() method can be invoked only from a synchronized context.
E. The Thread.sleep() method can be invoked only from a synchronized context.
F. When the thread scheduler receives a notify() request, and notifies a thread, that thread immediately releases its lock.
答案：AD
參考：13-2 Java執行緒與Thread類別、13-3 Runnable介面、13-5 執行緒的互動處理

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A. synchronize 可以鎖定 static的方法
D. 如果要呼叫 wait() 必須要冠上synchronzie的內容, 例如 方法,或區塊.