The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
Also if I'm not mistaken, "enum" was not a reserved keyword until Java 1.5.
I've worked with system that have code written in older version of Java, that uses 'enum' as a variable name everywhere. Bad idea as the moment you roll 1.5 in, the code doesn't compile due to the enum errors.
If you are updating/ writing code using older JRE, just don't do that.