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Alex Rivera
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As a (pedantic) beginner Java programmer I would like to know, is it a good practice to move a common block of code that all subclasses use to a separate protected ( final ) method in parent class? Tasks like filling lists with common values, or common filtering algorithms, etc... Is it good to also use protected static methods? class A { protected final List<String> getVariants() {...} protected final List<String> filterResults(List<String> variants) {...} } class B extends A { public List<String> doSomethingUsefull() { List<String> commonVariants = getVariants(); ... return filterResults(commonVariants); } } class C extends A { public void doSomethingUsefull() { List<String> commonVariants = getVariants(); ... return filterResults(commonVariants); } public void doMoreUsefullThings() { List<String> commonVariants = getVariants(); ... return filterResults(commonVariants); } }
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