单项选择题
Given that the current directory is empty， and that the user has read and write permissions， and thefollowing：
Which statement is true？（）
A.Compilation fails.
B.The file system has a new empty directory named dir.
C.The file system has a new empty directory named newDir.
D.The file system has a directory named dir， containing a file f1.txt.
E.The file system has a directory named newDir， containing a file f1.txt.
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单项选择题
Whichcapabilityexistsonlyinjava.io.FileWriter？（）
A.Closing an open stream.
B.Flushing an open stream.
C.Writing to an open stream.
D.Writing a line separator to an open stream. -
单项选择题
Given: What is the output?（）
A.42
B.420
C.462
D.42042 -
单项选择题
Given： 11.double input = 314159.26； 12.NumberFormat nf = NumberFormat.getInstance（Locale.ITALIAN）； 13.String b； 14.//insert code here Which code， inserted at line 14， sets the value of b to 314.159，26？（）
A.b = nf.parse（ input ）；
B.b = nf.format（ input ）；
C.b = nf.equals（ input ）；
D.b = nf.parseObject（ input ）；
