random ids in idea

Stop entering ad-hoc magic constants or 1,2,3,... sequences in your intent request codes, or build scripts to generate random translation keys.

comments formatting

Some people argue that if you do not intend to produce javadoc for your project, you should not clutter your comments with unnecessary <pre>, <blockquote>s and the likes

enums IV

So you find yourself calling values() lots in your code.

enums III

Enums have a name() method. And it has a very precise meaning.

enums II

is it: Days day = MONDAY; or is it: Days days = MONDAY;