How to get Java proxy values ​​set in control panel-> java-> network settings

Question

I wanted to know how I can get the values ​​of the proxy server settings that the user sets for java applications in the control panel?

I tried to use How to get proxy settings from system settings in Java , but I got Direct Access as output when I really was behind the proxy.

I know jnlp does this by default, but I used the advanced installer (exe), so I had to do it programmatically.