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How does RandomFileAccess lock at the OS level?

If I open a filed using the RandomFileAccess command and "rw", will the OS stop the file from being written to by any other program? will a subsequent call using "rw" fail?

Would this differ between windows and *nix?

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CEHJ

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jjacksn

ASKER

Ug.... I can't seem to do this simple thing:

in the simplest case, I want to open a file what to open a file such that no one else can write to it while it is open... I know you can do this in windows, at least.

However, calling

raf = new RandomAccessFile(fileName, "rw");
raf = new RandomAccessFile(fileName, "rw");

works... so that's not going to do it. does the normal File object?

CEHJ

See http://javaalmanac.com/egs/java.nio/SetFileLock.html

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Mick Barry

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jjacksn

ASKER

objects, that's great thanks.

I do know, at least in windows, that I've been looking at a file, and then tried to right to it, and it was "locked" by another program. I don't mind if someone is reading the old data, so long as that don't to write to it until the first method call finished. Can this be accomplished?

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Mayank S

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