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I. Initialization of java objects The first step is to load the class. A java object loads the class before initialization and generates the class object in the JVM. Loading a class does the following, which is described recursively below. (See Reflection for more details on Class objects Click here) If the class has a parent, the parent class ...

ReentrantLock and Lock Synchronized and ReentrantLock are different Reentrant: Both are reentrant Lock implementation: Synchronized is implemented by jvm, and ReentrantLock is implemented by jdk.(We can understand that one implementation is at the operating system level and the other is at the user's own level.) The implementation of Synchroni ...

Summarize the knowledge points related to JNI and NDK. Reprinted please indicate: http://blog.csdn.net/feather_wch/article/details/79599270 JNI and NDK Programming Version: 2018/3/18-1 (11:36) JNI and NDK Programming Brief Introduction to JNI and NDK Reference books Brief Introduction to JNI and NDK ...

What is a Stack? The stack here and the java stack of the jvm are not one thing... As a data structure, I feel that stack is like an interface. There are many ways to realize stack functions, such as using arrays, collections and linked lists. The most important feature of stack is to go first, then go out. You can imagine how to put the box o ...

1. The Construction Method of File Class (1) The role of File classes Representing a file or directory with an object of the File class (2)File(String path) Create a File object by specifying the path of a file or directory Path: It can be either a relative path or an absolute path. For example: File noteFile = new Fil ...

Singleton pattern is a common design pattern, and may be the least code in design pattern. But less doesn't mean that it's easy, easy to use, easy to use, and easy to use. Because it involves a lot of Java underlying knowledge such as class loading mechanism, Java memory model, volatile and so on. brief introduction The singleton pattern belong ...

Integrating Redisson with SpringBoot I. Introducing Dependence <dependency> <groupId>org.redisson</groupId> <artifactId>redisson-spring-boot-starter</artifactId> <version>3.10.6</version> </dependency> 2. Adding configuration ...

ELK Log Platform System Installation 1. Download elk wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.6.0.tar.gz wget https://artifacts.elastic.co/downloads/logstash/logstash-5.6.0.rpm wget https://artifacts.elastic.co/downloads/kibana/kibana-5.6.0-x86_64.rpm II. jdk Installation [roo ...

Chapter 2 Database Environments Whether you are using Direct Persistence Layer (DPL) or the underlying API, you must use a database environment. A database environment encapsulates one or more databases. By allowing a single in-memory cache for each database contained in the environment, this encapsulation provides your thread ...

Annotations to JAVA What is annotation? Annotations are still very popular at present, and Sprinng, which we often use, uses annotations. Adding annotations can make the code concise, easy to read and use. First, let's look at our own meta-annotations in java, under the java.lang.annotation package, where @Native@Repeatable ...