Java applets and applications that are not signed or that are self-signed are typically blocked by default due to security concerns. However, if users trust a particular website and want to run Java content from it, they can add that website to the Exception Site List to override the default security settings.

1. Control Panel (Windows):
   • Go to the Windows Control Panel.
   • Search for “Java” and open the “Java” control panel.
   • In the “Java Control Panel” window, navigate to the “Security” tab.
   • Click the “Edit Site List…” button.
   • Add the URLs of the websites you want to trust and run Java content from.
2. Java Control Panel (macOS):
   • Go to “System Preferences” on your Mac.
   • Search for “Java” and open the “Java” control panel.
   • In the “Java Control Panel” window, navigate to the “Security” tab.
   • Click the “Edit Site List…” button.
   • Add the URLs of the websites you want to trust and run Java content from.

It’s important to note that adding websites to the Exception Site List can potentially expose your system to security risks, as it allows Java content to run without meeting the normal security requirements. Only add websites to the list that you absolutely trust.

Also, keep in mind that Java applets are becoming less common due to security concerns and modern web development practices. Most modern browsers are moving away from supporting Java applets and instead encourage the use of other technologies for web applications.

If you’re specifically looking for a list of trusted sites for Java applets, this is not a predefined list provided by Oracle or Java. Users individually manage their own Exception Site Lists based on their specific needs and trust in certain websites.