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[QUOTE="Robert Olofsson, post: 547870"]
: I wanted to ask if I have to explicitly close all open files (using
: FileInputStream.close and similar methods) in order to free
: file-descriptors, or is it taken care of automatically by the GC
: whenever it runs?

Yes, you have to close/dispose/flush lots of things in java.
Streams, Graphics, Images, windows...

Java may have a Garbage Collector, but system resources still has
to be handled. Some of the resources have finilizer methods that
clean up things nicely, some things like oracles prepared statements
however will not clean themself up at all ( => if you dont close
you run out of cursors in the database after a while).

Basically this means that you have to write code that looks like:

InputStream is = null;
try {
is = new FileInputStream (...);
....
} finally {
if (is != null)
is.close ();
}

Add additional try/catch as needed.

By having a finally you pass your close-code before exiting
even if an exception is thrown.

/robo
[/QUOTE]

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