Closing a file

[marlon tan]

Hi,

In using Java IO classes, you often wrap lower level input/output stream to a higher level one. For example,

FileWriter lower = new FileWriter(filename);
BufferedWriter higher = new BufferedWriter(osw);

What's the appropriate way of closing the file, do you close the file using
lower.close() or higher.close(), or both?

Thank you.

[Ernest Friedman-Hill]

The "wrapper" classes like BufferedWriter pass the close() call along to the "wrapped" object -- so calling upper.close() automatically calls lower.close() as well.