單項(xiàng)選擇題

When comparing java.io.BufferedWriter to java.io.FileWriter， which capability exists as a method in only one of the two？（）

A. closing the stream
B. flushing the stream
C. writing to the stream
D. marking a location in the stream
E. writing a line separator to the stream

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多項(xiàng)選擇題

10. class MakeFile {
11. public static void main（String[] args） {
12. try {
13. File directory = new File（”d”）；
14. File file = new File（directory，”f”）；
15. if（!file.exists（）） {
16. file.createNewFile（）；
17. }
18. } catch （IOException e） {
19. e.printStackTrace
20. }
21. }
22. }
The current directory does NOT contain a directory named “d.” Which three are true？（）

A. Line 16 is never executed.
B. An exception is thrown at runtime.
C. Line 13 creates a File object named “d”.
D. Line 14 creates a File object named “f‟.
E. Line 13 creates a directory named “d” in the file system.
F. Line 16 creates a directory named “d” and a file “f” within it in the file system.
G. Line 14 creates a file named "f " inside of the directory named “d” in the file system.

單項(xiàng)選擇題

public class Wow {
public static void go（short n） {System.out.println（”short”）； }
public static void go（Short n） {System.out.println（”SHORT”）；}
public static void go（Long n） {System.out.println（” LONG”）； }
public static void main（String [] args） {
Short y= 6；
int z=7；
go（y）；
go（z）；
}
}
What is the result？（）

A. short LONG
B. SHORT LONG
C. Compilation fails.
D. An exception is thrown at runtime.

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When comparing java.io.BufferedWriter to java.io.FileWriter， which capability exists as a method in only one of the two？（）

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When comparing java.io.BufferedWriter to java.io.FileWriter， which capability exists as a method in only one of the two？（）