单项选择题

Given：
11.String test = "This is a test"；
12.String[] tokens = test.split（"\s"）；
13.System.out.println（tokens.length）；
What is the result？（）

A.0
B.1
C.4
D.Compilation fails.

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单项选择题

Given that c is a reference to a valid java.io.Console object， and：
11.String pw = c.readPassword（"%s"， "pw： "）；
12.System.out.println（"got " + pw）；
13.String name = c.readLine（"%s"， "name： "）；
14.System.out.println（" got "， name）；
If the user types fido when prompted for a password， and then responds bob when prompted for a name，what is the result？（）

A.An exception is thrown at runtime
B.pw： fido got fido name： bob got bob
C.pw： got fido name： bob got bob
D.Compilation fails.

多项选择题

Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object？（）

A.When using versions of Java technology earlier than 5.0.
B.When sharing a StringBuffer among multiple threads.
C.When using the java.io class StringBufferInputStream.
D.When you plan to reuse the StringBuffer to build more than one string.

单项选择题

Given：
12.Date date = new Date（）；
13.df.setLocale（Locale.ITALY）；
14.String s = df.format（date）；
The variable df is an object of type DateFormat that has been initialized in line 11.
What is the result if this code is run on December 14， 2000？（）

A.The value of s is 14-dic-2000.
B.The value of s is Dec 14， 2000.
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 13.

Given： 11.String test = "This is a test"； 12.String[] tokens = test.split（"\s"）； 13.System.out.println（tokens.length）； What is the result？（）

相关考题

Given：
11.String test = "This is a test"；
12.String[] tokens = test.split（"\s"）；
13.System.out.println（tokens.length）；
What is the result？（）