How Can I get the Jar file path ?

I have an aplication in a Jar file. This application might be situated in any directory.
I would like to know programatically the path where it was installed.
Is there any way to know this simple thing in Java? I cannot believe that there is not a function like System.getProperty("user.dir") for this as System.getProperty("user.dir") will always return the directory from where the Java VM was lauched!
Thank you!

You can get the location with:
URL codeBase = getClass().getProtectionDomain().getCodeBase().getLocation();But as has been pointed out, it's probably better to specify the directory to store these files some other way, e.g. use a batch file or shell script to launch your program and make it the cuirrent directory, or put the directory in as a property or command argument.

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