How to enable Java logging
If you have the need to enable Java logging on Windows here’s how to do it:
In the Start Menu of Windows type “Configure Java”
In the Advanced tab, check the Enable tracing and Enable logging checkboxes.
Once you are done with the testing. Logs will be saved in the following location:
C:\Users\%username%\AppData\LocalLow\Sun\Java\Deployment\log
Hope this helps.