先試後買

A. Hello

B. Compilation fails

C. there

D. A NumberFormatException is thrown

A. At Line n1, implement the java.io.AutoCloseable interface

B. At line n1, implement the java.io, Serializable interface.

C. At line n3, replace readObject (0 with readLine().

D. At line n2, in the main method signature, add throws IOException, ClassCastException.

E. At line n2, in the main method signature, add throws IoException, ClassNotFoundException.

F. At Line n3, replace Car with LuxurayCar.

A. The tryLock () method returns a boolean indicator immediately regardless if it has or has not managed to acquire the lock.

B. The Lock () method returns a boolean indicator immediately regardless if it has or has not managed to acquire the lock

C. The tryLock () method returns a boolean indicator immediately if it has managed to acquire the lock, otherwise it waits for the lock acquisition.

D. The lock () method returns a boolean indicator immediately if it has managed to acquire the lock, otherwise it waits for the lock acquisition.

A.

B.

C.

D.

E.

A. true
true

B. true
false

C. False
false

D. false
true