You still have no command line for actually running the program.
PATH is wrong. It looks like you are trying to run the jar with it? Not sure why you would need PATH but you could just try putting the command to run the jar as
/path/to/java -jar /path/to/myjar.jar
and unless you have a strange directory structure the crontab will look like
1 * * * * /home/user/jar/cron.sh
Although it doesn't matter very much where you put the jar and script so long as you have executable permission