多选题 Given a directory structure:
- baseDir
- testDir
- subDir2
- Shackelton.txt
and given the following code:
12. String name = "testDir" + File.pathSeparator + "subDir2" + File.pathSeparator + "Shackelton.txt";
13. File f = new File (name);
14. System.out.println("exists " + f.exists());
Assuming the proper import statements and exception handling, which statements must be true in order for the output to be "exists true"? (Choose three.)

A、 Line 12 is correct as it stands.
B、 Line 14 is correct as it stands.
C、 The program must be invoked from the baseDir directory.
D、 The program must be invoked from the testDir directory.
E、 Line 12 must use File.separator instead of File.pathSeparator.
F、 Line 14 must use the method fileExists() instead of exists().

【正确答案】 B、C、E

【答案解析】