Naming convention for properties in property file

Question

What are the naming conventions for property names defined in properties files in Java? Can I use uppercase or only lowercase?

For example: bankAccountNumber or bank.acc

Answer 1

Actually Resource Bundle accepts only fully qualified base name of the bundle, with no file extension. In this case it will try to load the bundle of files like this

messages/EN/properties.properties

I am sure you intend something different than the conventional internationalization, but convention would have been "messages_en.properties" (en when language, EN when country)