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Christoph Kroczek
2019-07-13 21:15:27 +02:00
parent d3fcb6a76e
commit edf21efe0a
1 changed files with 5 additions and 5 deletions
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effectivejava/item001/README.md
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@@ -10,11 +10,11 @@ Use factory method to construct an instance by a good understandable name.
The instance shall be only created when there is no existing one. The instance shall be only created when there is no existing one.
advantages of factory method usage instead of constructors: advantages of factory method usage instead of constructors:
# Unlike constructors the method has a meaningful name. * 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 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. * 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 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. ???? * The class of the returned object need not exist when the class containing the method is written. ????
# Clues # Clues