Combining a userdefined float inside a shadowbox

Question

Is it possible to combine the "program" part in a shadowbox?

\documentclass{article}

\usepackage{float}

\floatstyle{ruled}
\newfloat{program}{thp}{lop}
\floatname{program}{Program}

\begin{document}

\begin{program} ## FROM HERE
  \begin{lstlinsting}[basicstyle={\footnotesize},language=Java,showstringspaces=false,tabsize=4]

class HelloWorldApp {
  public static void main(String[] args) {
    //Display the string
    System.out.println("Hello World!");
  }
}
\end{lstlisting}
  \caption{The Hello World! program in Java.}
\end{program} ## TO HERE

\end{document}

Example is slightly modified from the one at the bottom of link text. Here is an image of what I want to put in the shadowbox. The image is borrowed from the above page.