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1. Singleton mode Singleton mode is the most common mode. It is often used in the development process. The purpose is: There is only one instance. This instance can only hold one globally shared data, or only hold a pile of interfaces, etc. many singleton modes can be used. Recently, I found some common errors / problems in the process of rev ...

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 ...

Example creation mode (single type) Hungry Han style Hungry Chinese singleton has created a static object for the system to use at the same time of class creation, which will not be changed in the future. Therefore, it is thread safe and can be directly used for multithreading without problems. The feature of this pattern is that once th ...

As we all know, singleton mode is often used in writing Java projects, such as creating object-oriented singleton mode, but this mode can be cracked by reflection mechanism. It is called violent reflection here, and multiple objects can be created by decompilation. Here we use the classic hungry man and lazy man for actual combat, And how to av ...

catalogue 1, Singleton mode 1. What is singleton mode 2. Single case pattern classification 2, Producer consumer model 1. What is the blocking queue 2. Blocking queue in standard library 3. Producer consumer model 3, Timer 1. What is the timer 2. Timer in standard library 3. Implement timer 4, Thread pool 1. What is thread pool 2. ...

1, Overview of design patterns 1.1 introduction to design mode Design pattern is the useful experience that programmers have summed up in the face of similar software engineering design problems. Pattern is not code, but the general knowledge of a certain kind of problems With solutions, design patterns represent best practices. These so ...

1. Object oriented principle Principle of single responsibility: That is, a class should be responsible for only one responsibility. For example, class A is responsible for two different responsibilities: Responsibility 1 and responsibility 2. When a is changed due to the change of responsibility 1 requirements, the implementation e ...

preface Singleton mode is a creation mode. This class is responsible for creating its own objects and ensuring that only a single object is created. This class provides a way to access its unique object, which can be accessed directly without instantiating the object of this class.  1. Lazy style public class SluggardSingleton { ...

catalogue Characteristics of inheritance relationship: Three variables have the same name: The characteristics of calling member methods in inheritance: override of methods in inheritance: Preserve the functionality of the method of the parent class when overridden Access characteristics of construction methods in inheritance: super keyw ...

1. Single case mode elements Ensure that there is only one instance in a class and provide a global access point a.Private construction method b.Private static references point to their own instances c.Public static method with its own instance as return value 2. Hungry Han style single example public class Hungry { //Priv ...