In Script editor i have written a command to boot the JAR.
do shell script \"cd /Desktop/RunJar/; java -jar RunMyJar.jar\"
and Saved as
To add to Paul's answer
on open of finderObjects
repeat with currFile in finderObjects
-- ok, we have our current item. But it's an "alias": a Mac OS path
-- not a POSIX path
set unixPath to POSIX path of currFile
set base to do shell script "dirname " & unixPat
set fname to do shell script "basename " & unixPath
-- you could ask the Finder to give this to you too -- I'll use this way because
-- I'm guessing it's more familiar to you
do shell script "cd '" & base & "';" & " java -jar " & fname
end repeat
end open