Programming VIP

catalogue 15. Decoration mode 15.1 example 2 15.2 example 3 15. Decoration mode Decoration mode: dynamically add some additional functions to an object. It wraps the real object by creating a wrapper object, that is, decoration. For the newly added functions, the decorator mode is more flexible than the production subclass. Consider usin ...

java design pattern - singleton pattern preface Singleton Pattern is one of the simplest design patterns in Java. This type of design pattern is a creation pattern, which provides the best way to create objects. This pattern involves a single class that is responsible for creating its own objects while ensuring that only a single object ...

Visitor mode In real life, some collection objects have many different elements, and each element also has many different visitors and processing methods. For example, there are many scenic spots and tourists in the park. Different tourists may have different comments on the same scenic spot; The prescription list issued by the hospital doctor ...

The jdk used is 1.7. You need to understand the reflection mechanism and the concept of generic bytecode registration! 1, Agent mode Proxy mode is a commonly used java design mode. Its feature is that the proxy class has the same interface with the delegate class. The proxy class is mainly responsible for preprocessing messages for the delega ...

proxy pattern Simply put: instead of accessing the real object, the proxy object can be used to provide additional functional operations to extend the function of the target object without modifying the original target object. The main purpose of the proxy mode is to extend the capabilities of the target object, for example, you can add s ...

1, Definition Prototype Pattern: one of the innovative patterns, which uses prototype instances to specify the type of objects to be created, and creates new objects by copying these prototypes. 2, UML class diagram 3, Roles and responsibilities Prototype: declare an interface that clones itself.Concrete Prototype: it implements an operat ...

preface Large factory interview has always been a favorite topic in the programmer circle during fishing time. Entering a large factory must also be the dream of countless programmers. The question about "principle" is almost a necessary question for Android developers nowadays, especially in large factory interviews. Small partners ...

Sorting is always from easy to difficult, and the agent mode is not difficult to understand, because the front-end partners are commonly used agents. Today, sort out the so-called agent mode What is the agent model Agent mode is very common. Not only do we see the so-called agent mode in our life, brokers, secretaries, lawyers, including in ...

Design pattern: structural pattern – Proxy Pattern 1. Introduction Structural patterns describe how classes or objects form a larger structure according to a certain layout. It is divided into class structured pattern and object structured pattern. The former uses inheritance mechanism to organize interfaces and classes, and the lat ...

1. Definitions A design pattern that provides a method to access elements in a collection in sequence, but does not expose the implementation details inside the collection, belongs to behavioral design pattern The iterator mode separates the storage and traversal of data. The storage is handed over to the aggregation class, and the travers ...