Understanding the learning methods of design patterns

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We should understand and master the design patterns from these seven aspects.
1. Introduction of the mode: name, alias, abstract, and intention of the Mode
2. schema structure: UML diagram, JavaSource code
3. Advantages and disadvantages of the Model
4. Application scenarios of Models
5. Implementation theory of models:
Describes the problems encountered when the mode is implemented in Java and the corresponding solutions.
6. Example
7. Related models