單項(xiàng)選擇題

Which statement is true？（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.Synchronizing the run（） method would make the class thread-safe.
D.The data in variable "x" are protected from concurrent access problems.
E.Declaring the doThings（） method as static would make the class thread-safe.
F.Wrapping the statements within doThings（） in a synchronized（new Object（））{} block would make the class thread-safe.

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多項(xiàng)選擇題

Given that Triangle implements Runnable， and：

Which two statements， inserted independently at both lines 35 and 41， tend to allow both threads to temporarily pause and allow the other thread to execute？（）

A.Thread.wait（）；
B.Thread.join（）；
C.Thread.yield（）；
D.Thread.sleep（1）；
E.Thread.notify（）；

多項(xiàng)選擇題

Which three changes should be made to adapt this class to be used safely by multiple threads？（）

A.declare reset（） using the synchronized keyword
B.declare getName（） using the synchronized keyword
C.declare getCount（） using the synchronized keyword
D.declare the constructor using the synchronized keyword
E.declare increment（） using the synchronized keyword

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Which statement is true？（）

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Given that Triangle implements Runnable， and： Which two statements， inserted independently at both lines 35 and 41， tend to allow both threads to temporarily pause and allow the other thread to execute？（）

Which three changes should be made to adapt this class to be used safely by multiple threads？（）

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Which statement is true？（）

Given that Triangle implements Runnable， and：

Which two statements， inserted independently at both lines 35 and 41， tend to allow both threads to temporarily pause and allow the other thread to execute？（）

Which three changes should be made to adapt this class to be used safely by multiple threads？（）