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Singleton mode Reference documents 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 is created. Thi ...

1. Overview of design mode [concept] some writing methods of code: flexible program and convenient maintenance; But the code is obscure and not easy for others to take over. 2. Single case design mode [concept]: there is one or some special class in the whole project. Only one object belonging to this class can be created. 3. Shared dat ...

1. Single case introduction Definition: Ensure a class has only one instance, and provide a global point of access to it (ensure that a class has only one instance, and instantiate it by itself and provide this instance to the whole system.) Concept: an object can only create one instance Follow the rule: privatize the constructor and obtai ...

Memory leak Memory leak caused by single case public class SingletonActivityContext { private static SingletonActivityContext instance; private Context context; private SingletonActivityContext(Context context) { this.context = context; } public static SingletonActivityContext getInstance(Context context) { ...

1 Introduction to single example design mode Class singleton design pattern is to take certain methods to ensure that there can only be one object instance for a class in the whole software system, and the class only provides a method to obtain the object instance (static method). 2. There are eight ways of single case design mode 2.1 hungry ...

Snowflake algorithm The snowflake algorithm is suitable for generating globally unique numbers, such as database primary key id, order number, etc As for why it is called snowflake algorithm, it is because scientists believe that there are no two identical snowflakes in nature through research. Therefore, this algorithm is named ...

1, Brief description The singleton pattern is the simplest in Java Design pattern one of. 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 is created. This class provide ...

Use of self-developed frame IoC container The most basic functions of the framework ◆ resolution configuration ◆ locate and register the object, which is a mark (annotation). After locating the object, you need to register the object in the container ◆ inject the object and return the object to the user accurately when the user needs it ◆ ...

catalogue Singleton design pattern Introduction to single example design mode Eight ways of single case design mode Hungry Han formula (static constant) Hungry Chinese (static code block) Lazy (thread unsafe) Lazy (thread safety, synchronization method) Lazy (thread safe, synchronous code block) Static inner class enumeration Source ...

Thread synchronization mechanism Thread synchronization refers to multiple threads operating on the same resource Concurrency means that the same object is operated by multiple threads at the same time in real life , We'll meet“ Same resource , Many people want to use it " Question of , such as , In the canteen, Everyone ...