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1, First, look at several circular dependencies 1. Constructor injection loop dependency @Service public class A { public A(B b) { } } @Service public class B { public B(A a) { } } 2. singleton pattern field property or setter injection cyclic dependency @Service public class A { @Autowired private B b; } @Service ...

Project introduction and function display Analysis on technology selection of ATM system Technical point analysis Object oriented programming: Each user Account is an object: therefore, the Account class Account needs to be designed to create an Account object and encapsulate Account informationUse collection containers: The system ...

preface This article records the author's journey of learning the recolerview caching mechanism 1, Overview We all know that RecyclerView will not lead to OOM in any case, and this depends on its own powerful recycling and reuse mechanism. How to realize its recycling and reuse mechanism? The author records the analysis process below ...

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. ...

Zero. Learning objectives of this lecture Master addition operatorMaster subtraction operatorsMaster multiplication operatorsMaster division operatorMaster self increasing and self decreasing operators 1, Operator overview An operator is a symbol specifically used to tell a program to perform a specific operation or logical operation. An ...

Java serialization and deserialization Reprinted in https://www.cnblogs.com/9dragon/p/10901448.html 1, Meaning, meaning and usage scenario of serialization Serialization: writing objects to IO streams Deserialization: recovering objects from IO streams Meaning: the serialization mechanism allows the Java objects that realize serialization to ...

Personal blog portal, welcome to visit Tree: Definition: a tree has at most one root node. The terminal of each path is called terminal node, also known as leaf node. A node that is neither a root nor a leaf is called an intermediate node, and the line between the node and the node is called an edge. From bottom to top, it is called height * ...

2. Basic Java syntax 1. Use of Java keywords Definition: a string (word) with special meaning given by the Java language for special purposes Features: all letters in the keyword are lowercase Specific keywords: 2. Reserved word: the current Java version has not been used, but the later version may be used as a keyword. Specific reserved ...

Title: The N numbers 0,1, ····, n-1 are arranged in a circle, starting from the number 0, and the m-th number is deleted from the circle each time (counting from the next number after deletion). Find the last number left in the circle. For example, the five numbers 0, 1, 2, 3 and 4 form a circle. Starting from ...

1. Circular dependency resolution in the case of prototype Bean First of all, Spring will not scan prototype beans in the scanning phase. These prototype beans will be created only when called. List several scenarios for prototype beans to briefly describe: (1) Suppose there are two objects, class A and class B, and both are defined as pro ...