gistfile1.java

// BAD:
List<PersonEntity> pes = someFetcherFunction.findByAgeGreaterThan(18);
if (pes.contains(currentPE)) { return "Hello, sir/madam."; }
else { return "This method is for adults only!"; }



// GOOD:
static Integer LEGAL_ADULTHOOD_AGE = 18; // in class PersonEntity
//...
List<PersonEntity> listOfKnownAdults = someFetcherFunction.findByAgeGreaterThan(PersonEntity.LEGAL_ADULTHOOD_AGE);
if (listOfKnownAdults.contains(personBeingCheckedForAdulthood)) { return "Hello, sir/madam."; }
else { return "This method is for adults only!"; }