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Editorial Team
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Asked: 2026-05-13T06:36:02+00:00

I reuse a handful of classes for multiple projects, like Postal Address, State, Zip

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I reuse a handful of classes for multiple projects, like Postal Address, State, Zip Code and Phone Number. Associated to them maybe parse/format classes (like Phone Number Formatting).

Is it okay to have a JAR with only a couple of classes? An alternative would be to have one “Miscellaneous” JAR with all the classes however it feels dirty to have so few classes for different purposes within the same JAR.

postal.jar
  Address
  Zip
  ZipParser
  ZipFormatter
  State

phonenumber.jar
  PhoneNumber
  PhoneNumberFormatter
  PhoneNumberParser

One jar (with 8 classes) or two (with 5/3 split)?

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  1. Editorial Team

    It’s okay to do it in any way that makes sense for your project(s). However, I guess I would ask the question:

    Do you think that you will ever use address without phone number or vice versa on your projects?

    To me, those items go pretty hand in hand. Even if you aren’t using both right away in some context you could need it soon in the future. I think a jar called something like contact-info.jar makes perfect sense.

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