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As one of the design patterns of Java, Template Method summarizes its advantages and features in one word: Abstract steps Next, record the understanding in the form of a question and answer Question 1: now you want to make a cake, you will do many things. We will make the cake into the code as follows. Now you have a whim and come up with a ...

concept When there is a one to many relationship between objects, the Observer Pattern is used. For example, when an object is modified, it will automatically notify the objects that depend on it. Observer mode belongs to behavioral mode. introduce Intent: defines a one to many dependency between objects. When the state of an object chan ...

concept Flyweight Pattern is mainly used to reduce the number of objects created to reduce memory consumption and improve performance. This type of design pattern belongs to structural pattern, which provides a way to reduce the number of objects and improve the object structure required by the application. The meta pattern attempts to re ...

Factory mode concept Factory Pattern is one of the most commonly used design patterns in Java. This type of design pattern is a creation pattern, which provides the best way to create objects. In factory mode, when creating objects, we do not expose the creation logic to the client, and point to the newly created objects by using a common in ...

The year-end bonus is not only the happiness of many people, but also the pain of many people. Of course, whether happiness is destined for you depends on whether happiness is destined for you. This is a metaphysics. In some companies, if one person has a year-end bonus, others will have it. In some companies, it is based on your performance ...

System.out.println(c2.getSimpleName());//The name of the class that does not contain the package name System.out.println(c5.getName()); } } ClassDemo3.java public class ClassDemo3 { public static void main(String[] args) { String s = ...

https://www.cnblogs.com/zuoxiaolong/p/pattern11.html This chapter discusses a design pattern, decorator pattern, which has a puzzled relationship with IO in JAVA. Definition: Decoration mode is to dynamically extend the function of an object without changing the original class file and using inheritance. It wraps the real object by creating a ...

76 | open source practice I (Part I): learn flexible application design patterns by analyzing Java JDK source code Application of factory pattern in Calendar ClassApplication of builder pattern in Calendar ClassApplication of decorator pattern in Collections classApplication of adapter pattern in Collections classKey review 76 | open sourc ...

Visitor mode Basic introduction to visitor mode Visitor Pattern encapsulates some operations that act on each element of a data structure. It can define new operations that act on these elements without changing the data structure.It mainly separates data structure and data operation, and solves the problem of data structure and operation cou ...

2. Singleton mode Singleton design pattern is one of the most commonly used design patterns in software development. That is, a class can only have one instance object in the whole system, which can be obtained and used. For example, the Runtime class representing the JVM Runtime environment. 1) Attention How to ensure that there is only on ...