java - Is this code implements 'Factory Pattern', factory methods, both or none? -

although subject has been discussed many times, still find myself confused it.

i have simple code sample:

public class fruitfactory {      public static apple getapple() {         return new apple();     }      public static banana getbanana() {         return new banana();     }      public static orange getorange() {         return new orange();     } } 

• which factory type code is? , proper writing of factory methods?
• the factory pattern definition is: create object without exposing creation logic client

if expose client of creation complexity example below, bad factory implementation?

public static orange getorange(string weight, string size,) {     return new orange(weight, size); } 

as said, factory merely abstraction object creation implementation intentionally encapsulated behind factory's public interface. factory not have class, not have package -- different languages achieve encapsulation of state , behavioral details differently (consider closures, instance).

a function in language allows "top-level" functions, can factory well:

public orange growneworange(string weight, string size) {     /// ...traditionally not callers concern. } 

if factory hides creation code behind way use without concerning said creation code each created object, have useful isolation (between getting new objects , manages them) solves problem factory pattern designed solve.

there factories designed create , manage 1 kind of objects , there create , manage multiple kinds of objects. fruit factory can specify concrete class of fruit want, still matches valid factory pattern.

categorizing factory implementations "types" done various oop authors, , may useful various reasons, not essential able utilize general idea advantage.

the useful advice encapsulate creation code in java package or class, specifying parameters of created object done on per-object basis, while factory state controlling creation logic -- instance size of reused object pool etc -- set during factory creation itself. object pools 1 of examples of factory pattern @ work.