你可能感興趣的試題

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.

多項選擇題

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.

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

你可能感興趣的試題

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

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

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