To have a virtualized package of Opera open an html page that is stored on your computer, you can run from the command line something like this: Opera.cameyo.exe page.html
If your java program is part of the package, you might do it like this: java_program.cameyo.exe -exec opera.exe page.html
You might have to include location for opera.exe.
If it doesn't work, please advise how you do it without virtualization.