How can I convert a signed jar file to an .exe file and keep it signed?

I have created a JAR file 开发者_C百科and I've signed it using keytool & jarsigner and then I generated a .exe file, but the .exe does not keep the information of the certificate

How can I convert this .jar to an .exe file without loosing this info?

Thanks for your help!

I found that the only way to do that is signing the generated .exe file.

And here's a guide to do that http://help.godaddy.com/article/4778?locale=en