java - can't take name of running jar -

i know there lot of similar questions , answers. no 1 solution work me! don't understand why(( have runnable jar example 'program.jar' , inside of want take name of jar (namely program.jar). i've tried following:

• classinsidejar.class.getprotectiondomain().getcodesource().getlocation().getpath()
• new java.io.file(classinsidejar.class.getprotectiondomain().getcodesource().getlocation().getpath())
• new file(".")).getabsolutepath() (and different variations getcanonicalpath etc)
• classloader.getsystemclassloader().getresource(".").getpath()

and in these cases can take path jar. example full path j:/folder/program.jar. can see j:/folder.

what's mistake? i'm trying name of jar in main class , others.

i've tried run jar double click , command line. result same

try this:

(new file(classinsidejar.class.getprotectiondomain().getcodesource().getlocation().touri())).getname();