Learn how to implement a constant in Java using final, static, enum, and annotation. ... @Deprecated public static final String OLD_CONSTANT = "Old value"; To declare an annotation, ...

You will learn how to declare a typesafe enum and use it in a switch ... You could avoid the “lack of type safety” and “not enough information” problems by using java.lang.String constants.

n "Constants" (JavaWorld, March 30, 2001), I wrote, "I'd be interested to hear how others declare their constants and why. I can post your responses in a future Q&A." Well, here are some reader ...