java - Is it Good to make so many methods for even small task also? -


i want know many developers same thing decrease size of long method , create many small sized methods same task. want know affects performance of application or not?

functions should short, between 5-15 lines personal "rule of thumb" when coding in java or c#. size several reasons:

  • it fits on screen without scrolling
  • it's conceptual size can hold in head
  • it's meaningful enough require function in own right (as standalone, meaningful chunk of logic)
  • a function smaller 5 lines hint perhaps breaking code (which makes harder read / understand if need navigate between functions). either or your're forgetting special cases / error handling!

but don't think helpful set absolute rule, there valid exceptions / reasons diverge rule:

  • a one-line accessor function performs type cast acceptable in situations.
  • there short useful functions (e.g. swap mentioned user unknown) need less 5 lines. not big deal, few 3 line functions don't harm code base.
  • a 100-line function single large switch statement might acceptable if extremely clear being done. code can conceptually simple if requires lot of lines describe different cases. suggested should refactored separate classes , implemented using inheritance / polymorphism imho taking oop far - i'd rather have 1 big 40-way switch statement 40 new classes deal with.
  • a complex function might have lot of state variables messy if passed between different functions parameters. in case reasonably make argument code simpler , easier follow if keep in single large function (although mark rightly points out candidate turning class encapsulate both logic , state)
  • sometimes smaller or larger functions have performance advantages (perhaps because of inlining or jit reasons frank mentions). highly implementation dependent, can make difference - make sure benchmark!

so basically, use common sense, stick small function sizes in instances don't dogmatic if have genuinely reason make unusually big function.

taken here.


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