How to execute a javascript with jshell?

Question

Given that Java 9 is upon us and we can finally have a java REPL with jshell I was hoping there was a way to add a shebang to a script and have jshell

Answer 1

The below works too; put it into a someScript.jsh file and run it with ./someScript.jsh. All arguments received by someScript.jsh will go to String[] args.

#!/home/gigi/.sdkman/candidates/java/current/bin/java --source 11

import java.util.Arrays;
import ro.go.adrhc.*; // example of using your classes, e.g. App below

public class X {
    public static void main(String[] args) {
        // do whatever you want here, e.g.:
        // System.out.println("Hello World");
        // or
        // use a class:
        // App.main(args);
        // e.g. from ro.go.adrhc package, by running:
        // CLASSPATH="/path-to-ro.go.adrhc-classes" ./someScript.jsh 
    }
}

The usage of the wrapping class, here X, is a mandatory trick for this to work.
Inspired by https://blog.codefx.org/java/scripting-java-shebang/.