GraalPolyglot.java

import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.Value;

public class GraalPolyglot {
    public static void main(String[] args) {
        try (Context context = Context.newBuilder().allowAllAccess(true).build()) {
            Value v = context.eval("ruby", "'Ruby String'");
            context.getBindings("js").putMember("v", v);
            context.eval("js", "print('v=' + v)");  //=> v=Ruby String
        }
    }
}