Java design mode usage crawling list

Java design mode usage crawling list

Usage Frequency	Type	Mode name	Mode	Simple definition
5	Creation type	Singleton	Single Piece	Ensure that a class has only one instance and provides a global access point to it.
5	Structural	Composite	Combination Mode	The object is combined into a tree structure to represent the relationship between the entire part. Composite makes the use of a single object and a composite object consistent.
5	Structural	Fa? Ade	Appearance	Provides a consistent interface for a group of interfaces in the subsystem, fa? Ade provides a high-level interface, which makes the subsystem easier to use.
5	Structural	Proxy	Proxy	Provides a proxy for other objects to control access to this object.
5	Behavior Type	Iterator	Iterator	Provides a method to access each element of an aggregate object sequentially without exposing the internal representation of the object.
5	Behavior Type	Observer	Observer	Define one-to-multiple dependencies between objects. When the status of an object changes, all objects dependent on it are automatically updated.
5	Behavior Type	Template Method	Template Method	DefineAlgorithmAnd some steps are delayed to the subclass. The templatemethod allows the subclass to redefine certain steps of the Algorithm without changing the structure of an algorithm.
4	Creation type	Abstract Factory	Abstract Factory	Provides an interface for creating a series of related or mutually dependent objects without specifying their specific classes.
4	Creation type	Factory method	Factory method	Define an interface used to create objects so that the subclass determines which class to instantiate. The factory method delays the instantiation of a class to the subclass.
4	Structural	Adapter	Adapter	The adapter mode converts a class-1 interface to another interface that the customer wants. The adapter mode makes those classes unable to work together due to incompatibility of the interface.
4	Structural	Decrator	Decoration	Dynamically add some additional responsibilities to an object. In terms of the added functions, the decorator mode is more flexible than the subclass generation.
4	Behavior Type	Command	Command	Encapsulate a request as an object so that you can parameterize the customer with different requests, queue requests, record request logs, and support auditable operations.
4	Behavior Type	State	Status	Allows an object to change its behavior when its internal state changes. The object seems to have changed its class.
4	Behavior Type	Strategy	Rule Mode	Define a series of algorithms, encapsulate them one by one, and enable them to replace each other. This mode allows algorithms to be independent of customers who use them.
3	Creation type	Builder	Generator	Separates the construction of a complex object from its representation, so that different representations can be created during the same construction process.
3	Structural	Bridge	Bridging	Separate the abstract part from its implementation part so that they can change independently.
3	Behavior Type	China of responsibility	Responsibility chain	Allow multiple objects to process requests, so as to avoid coupling between the request sender and receiver.
2	Creation type	Prototype	Prototype	Use a prototype instance to specify the type of the object to be created, and copy the prototype to create a new object.
2	Structural	Flyweight	Share
2	Behavior Type	Mediator	Intermediary	Encapsulate object interaction of some columns with an intermediary object.
2	Behavior Type	Visitor	Visitor Mode	An operation that acts on each element in an object structure. It allows you to define a new operation that acts on this element without changing the element classes.
1	Behavior Type	Interpreter	Interpreter	Given a language, it defines a representation of its syntax and an interpreter that uses this representation to explain sentences in the language.
1	Behavior Type	Memento	Memorandum	Capture the internal state of an object without interrupting the object, and save the state outside the object.