with jshell-wrapper you get runnable java scripts: it removes the heading shebang, adds an "/exit" for good measure, and passes the result to jshell

jshell-wrapper

TMP=`mktemp`
tail -n +2 $@ >> $TMP
echo "/exit" >> $TMP
$JAVA_HOME/bin/jshell -q --execution local $TMP
rm $TMP

#put this file in /usr/local/bin/ or somewhere in your $PATH

output of example script

federico@pawa:~$ JAVA_HOME=/opt/jvm/jdk1.9.0/ ./test.sh 
Hello world!
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test.sh

#!/usr/bin/env jshell-wrapper

System.out.println("Hello world!");

IntStream.range(1, 10).forEach(System.out::println);

Great wrapper script, but I changed the following line so I dont need the environment variable:
$JAVA_HOME/bin/jshell -q --execution local $TMP
to:
/usr/bin/env jshell -q --execution local $TMP

Great wrapper! I've made some changes to load lib and use in a Nginx as GCI.
I put in this project: https://github.com/deividgermano/jshell-cgi-wrapper