A few months ago I created a Java application which calculates chess ratings. I only ever tested it on my computer, but the program worked as expected.
I only just found out that on certain operating systems, the program doesn't work as it should. I've included a picture of the incorrect output on Windows 7 whereas this is what I get on Windows 8. (The player's rating should decrease since he scored only 1.5/5 against lower rated opposition). It seems that the program does not allow the player's rating to decrease.
Can anyone point me in the right direction as to why the program is behaving differently between these two versions of Windows? I was unable to find any explanation here on SO or anywhere else.
For future Googlers, the problem wasn't with Java; it was a problem with newlines in a text file from which my program was reading data. For some reason, the "\n" character separating values in my text file was not showing up in Windows 7 but worked fine in Windows 8. Very strange but glad that it's fixed!
