One-liner to turn jar with Main-Class into executable shell script

gistfile1.txt

#!/bin/bash                                                                                                                                         
# simple script for turning a jar with a Main-Class                                                                                                 
# into a stand alone executable                                                                                                                     
# cat [your jar file] >> [this file]                                                                                                                
# then chmod +x [this file]                                                                                                                         
# you can now exec [this file]                                                                                                                      
commandToRun="$(printf "%q " "$@")"
if test "$commandToRun" = "'' "; then
  eval "java -Xmx1G -jar $0"
else
  eval "java -Xmx1G -jar $0 $commandToRun"
fi
exit