Un esempio dovrebbe essere chiarificatore (ho usato sia il pacchetto listings come suggerivo che [tt]\textt[/tt] come suggeriva Enrico): `
\documentclass{beamer}
\usepackage{lmodern}
\usepackage{listings}
\lstset{basicstyle=\ttfamily}
\usetheme{EastLansing}
\setbeamercolor{block title alerted}{parent=palette tertiary}
\setbeamercolor{block body alerted}{parent=palette primary}
\begin{document}
\begin{frame}[fragile]{Codici}
\begin{alertblock}{Obbiettivo}
Mostrare l'uso dei comandi con overlay specifications.
\end{alertblock}
\uncover<1->{\lstinline!System.out.println(“Hello World”); – uncover!}
\visible<2->{\lstinline!System.out.println(“Hello World”); – visible!}
\onslide<3->{\lstinline!System.out.println(“Hello World”); – onslide!}
\uncover<1->{\texttt{System.out.println(“Hello World”); – uncover}}
\visible<2->{\texttt{System.out.println(“Hello World”); – visible}}
\onslide<3->{\texttt{System.out.println(“Hello World”); – onslide}}
\end{frame}
\end{document}
` Il risultato:
[attachment=624]pr_2013-03-14.gif[/attachment]
Ciao
Claudio