Properties file vs Constants class in Java

Question

I am a bit confused between using a constants file and properties file in Java.

How to decide when to use Constants.java and when to use a .properties

Answer 1

• Constants - when you don't mind re-compiling the application each time you change value. Sort of an irony here. Why would you change something if it has been called a constant :)

• Properties file - when you want the luxury of just changing the value and maybe restarting the application to pick up the change.