To run this application from behind a firewall, you must specify proxy settings in order for the application to access a remote resource.
In the NetBeans IDE, right-click the SimpleSwingBrowser project in the Projects window, select Properties, and in the Projects Properties dialog, select Run.
In the VM Options field, set the proxy in the following format:
-Dhttp.proxyHost=webcache.mydomain.com -Dhttp.proxyPort=8080