24.9. Security and the Network
As much as we look forward to writing a great variety of powerful network-based applications, our efforts may be limited because of security concerns. Many web browsers, such as Mozilla and Microsoft Internet Explorer, by default prohibit Java applets from doing file processing on the machines on which they execute. Think about it. A Java applet is designed to be sent to your browser via an HTML document that could be downloaded from any web server in the world. Often you will know very little about the sources of Java applets that will execute on your system. To allow these applets free rein with your files could be disastrous.
A more subtle situation occurs with limiting the machines to which executing applets ...
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