Actually it depends on what program on your system requires Java, 64 bit systems run 32 and 64 bit software so whatever program you have that needs Java would depend on those factors.

I also agree with DavidR in the post prior to yours that if there is no distinct program on your system that needs java then it’s best to uninstall it, and if you do need to have it installed then at least disable it’s browser functionality via the Java control panel.