public: so they are usable outside the package;
static: to emphasize that there's only one
final : to say that it's a constant.
Note that final static primitives with constant initial values(that is, compile-time constants)
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Not really... final actually means the instance cannot be changed, e.g. the field value cannot be changed or the method body cannot be overrided. static means the instance belongs to a class, but not to an object instance, thus this static concept is only valid for method and field, but not class.
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