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Controls the type of inversion Inversion of control (IOC) aims to provide a simpler mechanism to set the dependencies of components and manage them throughout the life cycle. Generally, control inversion can be divided into two subtypes: dependency injection (DI) and dependency lookup (DL). These subtypes can be further decomposed into the s ...

Follow < buddy (anti fragment mechanism) of Linux kernel (4) > , if there is not enough memory in the migration type specified in the same zone, the fallback mechanism will be started to find suitable other types from the fallbacks array, obtain the steel page, and implement the core processing function of steel page as steel_ suitable_ f ...

I always think of beginners in my spare time java The basics of learning, However, it seems that yesterday's basic knowledge sometimes can't remember its principle and knowledge points. So review the summary notes again. Encourage each other!!! At the same time, find the feeling of learning!!! 1, Introduction to Java   Java is betwe ...

How does Spring Security store user data into the database? Up to now, we haven't connected to the database. In real projects, in most cases, we design our own permission database. However, Spring Security also provides us with a permission database designed by itself. Let's see what's going on first! Let's learn this simple one first, and the ...

[5 minutes to teach you] three kinds of verification code functions - Digital SMS verification code - Graphic verification code - sliding verification code Absrtact: we are doing some login verification of the background system. It is inevitable to use the verification code function to assist in verification and improve security. In our dai ...

Single responsibility mode:  in the design of software components, if the division of responsibilities is not clear, the result of using inheritance is often that the subclass expands sharply with the change of requirements and is full of repeated code. At this time, the key is to clarify the responsibilities. Typical mode • Decorator • Bridge ...

ps: This article is only for technical exchange and should not be used for other purposes. preparation Before writing code, you need to do the following preparations: 1. Configure Android ADB development environment 2. Installing pocoui dependency libraries in Python virtual environment 3. APK application of operating shear board Write ...

1. How to optimize the simple selection sorting algorithm? The basic idea of selective sorting: take out the minimum value in each cycle(maximum)Element as first element When the algorithm is implemented, every time the minimum element is determined, it will be continuously compared and exchanged to ensure the minimum first position; It is no ...

About the intern method of String class in java Antecedents During the review, I thought I understood the meaning of the String intern method when I wrote the section of common classes in notes, which is to return the address of the String constant in the String constant pool! String s1 = new String("zs"); String s2 = s1.intern(); Syste ...

The full text is completed on the basis of IDEA compiler. This article is for java beginners who have not learned all kinds of Java frameworks Most java WebSockets on CSDN adopt the spring boot framework This article does not use any framework related to spring, but only uses maven to import the websocket library Reference source: https://g ...