多项选择题

Given that c is a reference to a valid java.io.Console object，which two code fragments read a line of textfrom the console？（）

A.String s = c.readLine（）；
B.char[] c = c.readLine（）；
C.String s = c.readConsole（）；
D.char[] c = c.readConsole（）；
E.String s = c.readLine（"%s"， "name "）；

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单项选择题

Given：
12.String csv = "Sue，5，true，3"；
13.Scanner scanner = new Scanner（ csv ）；
14.scanner.useDelimiter（"，"）；15. int age = scanner.nextInt（）；
What is the result？（）

A.Compilation fails.
B.After line 15， the value of age is 5.
C.After line 15， the value of age is 3.
D.An exception is thrown at runtime.

多项选择题

Which three statements concerning the use of the java.io.Serializable interface are true？（）

A.Objects from classes that use aggregation cannot be serialized.
B.An object serialized on one JVM can be successfully deserialized on a different JVM.
C.The values in fields with the volatile modifier will NOT survive serialization and deserialization.
D.The values in fields with the transient modifier will NOT survive serialization and deserialization.
E.It is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable.

多项选择题

Given：

Which two statements are true about the result if the default locale is Locale.US？（）

A.The value of b is 2.
B.The value of a is 3.14.
C.The value of b is 2.00.
D.The value of a is 3.141.
E.The value of a is 3.1415.
F.The value of a is 3.1416.