How do you redirect the console log to a file for Java Web Start in Mac OS X? [duplicate]

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redirecting a java web start app logs to a file

How do you redirect the console log to a file for Java Web Start in Mac OS X? I am running an application as a Java Web Start, and I need the console data to persist; when the app closes, its console goes with it. Is there a way to redirect the console output to a log file?

For now, I am having my application stay open while I debug, but it would be nice to set this up for the unexpected.

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It turns out the answer from How do I pipe the Java console output to a file? does work, but the log goes in the following location under OS X (which I have not found documented anywhere):

/~/Library/Caches/Java/log

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If others happen to get into the problem, I'll let this other interesting bit of information.

The following link has additional information for deployment on OS X: http://www.ks.uiuc.edu/Research/biocore/javawebstart.shtml

and advises to set up in ‘~/.java/.deployment‘ the deployment.properties file with the following entries:

 deployment.javaws.showConsole=false  // I changed that to false for your need
 // allow logging to some file
 deployment.javaws.logToFile=true
 // define said file to your heart's desire
 deployment.javaws.logFileName=/tmp/webstart.txt // or ~/toto/whatever.lol if it suits you

This way, instead of ~/Library/Caches/Java/log you get what you wish.

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System.setOut(new PrintStream("log.txt"));

and better way is using SL4J ( http://www.slf4j.org/ ) or other logger library.