in reply to Rendering a simple graphic hello world in Java (using Perl)

I would suggest checking out the documentation for JOptionPane. If you'll look, you'll see that JOptionPane has a required first argument which specifies a parent frame - if you pass it a null, I think this should work. It's been roughly FOREVER since I did any Java, so check it for yourself.

Docs appear to be here, based on lazy googling.

for(split(" ","tsuJ rehtonA lreP rekcaH")){print reverse . " "}print "\b.\n";