Re: BufferedInputStream -- does not recommend "close()"?

Lew <>
Wed, 09 Jan 2008 10:58:59 -0500
Roedy Green wrote:

On Mon, 07 Jan 2008 21:51:37 +0100, Christian <> wrote,
quoted or indirectly quoted someone who said :

Java also closes all open streams on exit..
Well it might rather be the OS that cleans up any ressource of programs.

When did that start happening? IIRC some time ago, I forgot to close
is some program and the file did not get written. Adding the close
fixed it.

See upthread:
Mike Schilling wrote:

That's easy to check; the OS can close files, but it doesn't know
enough to flush data Java still has buffered.

The "file" in question may well be something only the Java program knows about
- from the OS's point of view it might still be a non-existent or zero-length
file at the time the JVM exits.

It might also be that the JVM is better about telling the OS of its crashes
than it used to be?

Even if so, there are still no guarantees about the completeness or
consistency or usability of an OS file after a Java program leaves without
properly close()ing its connection to it. That much hasn't changed.


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