FORM TEMPLATE METHOD (PATTERN)

INLINE TO TEMP

SPLIT TEMP VARIABLE

REMOVE ASSIGNMENTS TO PARAMETERS

EXTRACT CLASS

HIDE A DELEGATE

Instead of employee.getDepartment().getManager() it should be employee.getManager()

INTRODUCE A FOREIGN METHOD

What we call helper methods. Used to work with library classes to which we do not have access to edit code.

Introduce local extension

When a literary class does not provide methods that you frequently need you may want to create a new class that solely extends functionalities of literary class. A good example would be a class that adds functionalities to Date in Java.

Replace data value with object

In a simpler world, we start with representing programming concepts with data types like Strings and integers. But in some cases you will realize a simple string does not suffice all the logic we may want, for example, a string that represents full name may need it’s own method to render names. Ex: “firstName LastName”, or “Last, fullName” or names with title etc.

REPLACE ARRAY WITH OBJECT

REPLACE MAGIC NUMBER WITH CONSTANT

REPLACE TYPE CODE WITH SUBCLASSES

If you have a class where final type codes exist, for example, in a class named “Appointment” if you have a “private int appointmentType;” which can have values associated with “face to face”, “conf call” etc then you may want to create a superclass called appointment and create subclasses of it like ConferenceCall, and FaceToFaceAppointment which extends Appointment class.