sounds like the file is locked for writing. If you don't wait for the proocess to complete then the file would also be locked for reading.
What exactly is the process?
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Using Process.waitFor() in Java
Hello,
I'm writing a Java app in which the code runs an executable, and I keep running into a catch-22.
The result of running the executable is that it produces a text file.
My catch-22 problem is in using - or not using - the Process.waitFor() method after running the executable.
If I DON'T put in procwaitFor() (line 3), I get an exeption when I try to read in the file in line 4 - 'The process cannot access the file because it is being used by another process.'
If I DO put in proc.waitFor() (line 3), I can read from the file just fine. Only problem is,when I try to delete or overwrite the file later on - I get the same problem - 'The file cannot be deleted because it is being used by another process.'
What I don't completely understand is why waitFor() allows you to read from the file - but then won't let you delete or overwite it later.
Here is the code.
Thanks in advance.
1) Runtime rt = Runtime.getRuntime();
2) Process proc = rt.exec(<executable command that produces a text file>);
3) proc.waitFor(); //If this is included, I can't delete or overwrite the file later. If this is not included, line 4 throws an exception.
4) BufferedReader in = new BufferedReader(new FileReader(<path to file produced>))
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by: CPColinPosted on 2009-09-17 at 16:42:09ID: 25362140
Is it possible that your BufferedReader is still around when you try to modify the file? Try calling in.close() before you make any changes.