If you are using a development kit GUI you may be seeing an issue where there is a mis-translation of “,” and “.”. In these cases your operating system may be expecting something like 12.345 but the operating system may be converting it to 12,345.
The workaround is:
1. In Control Panel => Region and language: Set All Tabs (Format, Location, Keyboards and Languages, Administrative (Current Language for non-Unicode programs)) to English (US)
2. Reboot the PC
3. From Control Panel => Java => Temporary Internet Files => Settings => Delete Files
4. Re-run the Development Kit GUI