Flyweight (structural type)

One: Description: ( This mode is actually less used )

The Flyweight -sharing model is to share and reuse a large number of fine-grained elements. Reduce the creation of objects to reduce memory;

Note and the singleton mode is different: the various objects of the enjoyment meta-model have their own behavior and can be instantiated, the singleton model of the various objects of the same behavior can not be directly instantiated.

Two: Mode diagram:

Three: A simple example of implementing code:

1. Create the enjoy class of the image

2. Create shared-share objects (there can be many such pairs of images)

3.create a non-shared enjoyment meta-object

4. Create a factory of the yuan

5, the use and effect of the client ;

Flyweight (structural type)