@@ -0,0 +1,283 @@
+///usr/bin/env jbang %22$0%22 %22$@%22 ; exit $? # (1)%0A%0Aclass helloworld %7B // (2)%0A%0A    public static void main(String%5B%5D args) %7B%0A        if(args.length==0) %7B%0A            System.out.println(%22Hello World!%22);%0A        %7D else %7B%0A            System.out.println(%22Hello %22 + args%5B0%5D);%0A        %7D%0A    %7D%0A%7D

Create helloworld.java