21 lines
835 B
Markdown
21 lines
835 B
Markdown
# About this kata
|
|
This kata refers to the book Effective Java by Joshua Bloch.
|
|
It addresses
|
|
|
|
Item 1: Consider static factory methods instead of constructors.
|
|
|
|
# Problem description
|
|
Provid a class that
|
|
Use factory method to construct an instance by a good understandable name.
|
|
The instance shall be only created when there is no existing one.
|
|
|
|
advantages of factory method usage instead of constructors:
|
|
# Unlike constructors the method has a meaningful name.
|
|
# Unlike constructors it is not required to create a new object each time they are invoked.
|
|
# Unlike constructors it can return an object of any subtype of their return type.
|
|
# The returned object can vary from call to call as function of the input parameters.
|
|
# The class of the returned object need not exist when the class containing the method is written. ????
|
|
|
|
|
|
# Clues
|