Compatibility & Performance

When it is running, this applet functions well on all platforms and is very simple and fast to use. However, there seems to be a serious problem with the source. When compiled using Microsoft Visual J++, it runs without problem on all virtual machines. When compiled with Sun's JDK, no errors are produced, but a Security Exception is produced on all virtual machines when it is run. The problem seems to lie in the code used to change the contents of the list-boxes^4.3. It appears to follow the API, and the exact nature of the problem has not been determined. The only consequence of this problem is that the class has to be distributed as a binary rather than source.