devxlogo

It’s All a Matter of Trust

It’s All a Matter of Trust

If you’re building applets using Microsoft’s Visual J++, you might encounter problems the first time you try to run your applet outside of the development environment. Typical examples of this are:

  • Your applet can’t access local files (such as pictures required for animations) anymore;
  • Error messages about missing classes;
  • The annoying “Warning: Applet Window” message;
  • Other error messages that somehow seem to be security-related.

Puzzling though this may all seem, the reason is quite simple: all applets running inside the development environment are implicitly trusted, but once you run them outside VJ++, the Java VM will start to enforce security restrictions.

To make the Microsoft VM trust your applet (and thus make it run again), you’ll have to create a Cabinet (.CAB) file for the applet and digitally sign that. The tools you need for this can be found in the ‘Cab&Sign’ directory on your VJ++ CD-ROM, although you’ll also need a certificate from a commercial certification authority (like Verisign: see www.verisign.com for more information) if you plan to distribute your applets.

See also  How HealthStream Learning Center Supports Healthcare Education and Compliance
devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist