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Asked: 2026-05-10T20:23:51+00:00

I have to give a general note to some huge Java project for which

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I have to give a general note to some huge Java project for which I have but little visibility and I was wondering if there were any guidelines for determining:

  • what number of classes per package can be considered right, to low, or to high (this project has 3.89 classes per package, which seems a bit too small for me),
  • number of methods per class? (this project has 6.54 methods per class…
  • number of lines per method? (this project has about 7 lines per method (seems pretty good to me, maybe a bit low))

I should note that this question is only dealing with volumetry. I have a bunch of reports from quality tools (checkstyle, jdepend, cpd, pmd, ncss) that give me more vision about code redundancy, classes usage, bugs, etc.

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  1. Steve McConnell in his book Code Complete recommends about 7 methods per class and no more lines in a method then can be viewed in a single screen without scrolling.

    I’m not sure about classes per package.

    I would highly recommend reading Code Complete for more information on such topics.

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