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Old 09-27-2003, 11:53 PM   #1
Registered: Jun 2003
Distribution: Redhat
Posts: 245

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executable jar in java (cannot double click)


i have successfully made an executable jar in the command line and it works perfectly: java -jar <filename>.jar

the program executes well, but the problem is i always have to open the terminal just to run a jar file.

i cannot double click it on the desktop since it seems to be a compressed file. i changed the file association in gnome, but its still the same, the jar file is understood to be a compressed file.

what seems to be problem here?
Old 09-28-2003, 02:02 AM   #2
Registered: Aug 2003
Location: Planet Earth
Distribution: Linux Mint Debian Edition (LMDE)
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A jar file is the same thing as a zip file... it's just a compressed archive, so it doesn't make sense to "execute" it. Typically what you do is have your main class file -- the one that has "public static void main(String[] args)" in it -- outside the jar file. The rest of your classes are then members of a package, and stored in a jar file in a directory in your $CLASSPATH environment variable.
Old 09-29-2003, 04:43 AM   #3
Registered: Aug 2003
Location: Belgium
Distribution: Debian (server), Kubuntu (desktop)
Posts: 248

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You don't have to put your entry point (the class with your main method) outside of your jar file. You should write a script (just a text file) that executes java -jar <filename>.jar and execute the script.
Old 09-29-2003, 09:13 AM   #4
Registered: Jun 2003
Distribution: Redhat
Posts: 245

Original Poster
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well, after some clicks and some experimentation, i finally did it...

in my kde, under the control center - components - file associations, i looked for application/x-jar. in the application preference, i added the java executable with a -jar %1 argument.

when i clicked the jar file, it opened the swing program and ran perfectly! :-)


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