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Table of Contents Implementation of Concurrent HashMap Important concepts Important internal classes Node TreeNode TreeBin ForwardingNode Constructor Initialization: initTable() put operation get operation size operation Capacity expansion operation Conversion of Red and Black Trees H ...

I recently read some blogs about multithreaded deadlock analysis, especially Java multithreaded thread dump and analysis (jstack) In this article, the explanation is the clearest. I have some experience in deadlock analysis, and I will summarize and record it below. Catalog 1. Introduction to deadl ...

For these two kinds of locks, the performance of synchronized before JDK1.6 is far inferior to that of Lock, because synchronized needs to call the functions of the operating system and operate the kernel to complete, which is time-consuming. After JDK1.6, Oracle has optimized synchronized a lot, and sy ...

AOP aspect-oriented programming, relative to OOP object-oriented programming. Spring AOP exists to decouple. AOP allows a group of classes to share the same behavior. In OOP, code coupling can only be enhanced by inheriting classes and implementing interfaces, and class inheritance can only be a single inheritance, which prevents more behaviors ...

Understanding JVM memory allocation strategies Three Principles + Guarantee Mechanism There are three main principles and guarantee mechanisms for JVM memory allocation mechanism Specifically as follows: Priority assigned to eden area Big object, directly into the older generation Distribution of long-term survivors to older generations Space ...

Last article Loading of Beans for Spring Ioc Source Analysis (4): createBean() In this article, we will give a detailed analysis of the createBeanInstance() method for instantiating bean s, and the remaining steps will be described in other articles. Instantiate Bean At doCreateBean() code <2>, there is a line of code instanceWrapper = ...

Analysis of arrays and single linked lists? 2. Analysis of stacks and teams? I. Linear Tables Linear table is the most common and simplest data structure. It is a finite sequence of n data elements. There are two ways to realize linear ...

Each sentence Happy Mid-Autumn Festival Preface Before reading this article, I suggest reading it first. Opening chapter The effect is better. RestTemplate is a client tool provided by Spring to access Rest services. It provides a variety of convenient methods to access remote Http services, which can greatly improve the efficiency of client wr ...

Method public Class<?> loadClass(String name) throws ClassNotFoundException Play Class instances of this class by class name protected final Class<?> defineClass(byte[] b,int off,int len) According to the given bytecode stream b, off and len parameters represent the position and length of the actual class information in the byte arr ...

** Basic Introduction to spring **1. What is Spring? Spring is a lightweight framework for IoC and AOP containers.A framework for providing basic services for Java applications to simplify the development of enterprise applications, which allows de ...