多项选择题

A.private synchronized Object o；B.void go（）{ synchroniz……

Which three will compile and run without exception？（）

A.private synchronized Object o；
B.void go（）{ synchronized（）{/* code here */}
C.public synchronized void go（）{/* code here */}
D.private synchronized（this） void go（）{/* code here */}
E.void go（）{ synchronized（Object.class）{/* code here */}
F.void go（）{ Object o = new Object（）； synchronized（o）{/* code here */}

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热门试题

单项选择题What can be a result？（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.The code executes and prints "StartedComplete".
D.The code executes and prints "StartedComplete0123".
E.The code executes and prints "Started0123Complete".

多项选择题Whichtwoof statementsaretrue？（）

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.

单项选择题What is the result？（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.The code executes normally and prints "foo"；
D.The code executes normally， but nothing is printed.

单项选择题Which statement is true？（）

A.The output could be 5-1，6-1，6-2，5-2
B.The output could be 6-1，6-2，5-1，5-2
C.The output could be 6-1，5-2，6-2，5-1
D.The output could be 6-1，6-2，5-1，7-1

单项选择题What is the output if the main() method is run？（）

A.4
B.5
C.8
D.9
E.Compilation fails.
F.An exception is thrown at runhime.
G.It is impossible to determine for certain.