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Author: xiaoyu WeChat official account: Python Data Science Purpose: This article introduces you to a primary project of data analysis. The purpose is to understand how to use Python for simple data analysis through the project. Data source: Bloggers collect official account data of Beijing secondary housing through crawler collectio ...

Lao Du, eternal God!!! Features of java language 1. Simplicity. Single inheritance is supported in Java, multiple inheritance is supported in c + +, and there is no pointer in Java. 2. Robustness. There is an automatic garbage collection mechanism (GC) in java, and the jvm will recycle objects without variables in the heap. 3. Portable. Com ...

SpringBoot tutorial 01 introduction 1.1 how spring simplifies development Lightweight and minimally intrusive programming based on POJO, everything is bean;Loose coupling is realized through IOC, dependency injection (DI) and interface oriented;Declarative programming based on AOP and conventions;Reduce style codes through facets and templat ...

preface This article is mainly about some classic related to linked lists in data structures OJ At the end of the paper, we also provide OJ The specific website of the question is for everyone to practice OJ I hope you can have a deeper understanding of the linked list. Finally, it is not easy to create. I hope you can give encouragement, prai ...

In the process of developing applications, the ideal state is not to have errors. Even if errors occur, they should be detected during compilation. However, in reality, errors will occur from time to time when the program runs, which will not be expected. If ignored, it will lead to program crash.In C language, the program will indicate the err ...

annotation Work for about a year. Before reviewing, I found that many basic knowledge learning was not solid enough. From today on, I will start the weekly self-study task and record it. This note is a self-study note, which can also be read and viewed by everyone. What is annotation? Java Annotation, also known as Java Annotation, is an Anno ...

review In the previous article, we analyzed the type conversion, log adapter, class loading module and resolverutil (used to find qualified classes under the specified package), and also saw some design patterns used, such as adapter pattern and singleton pattern Next, go to a core of the basic support layer, DataSource DataSource In th ...

  preface When it comes to how to terminate a thread, the method that some readers usually think of immediately must be stop(), but the stop() method is not recommended (it is prohibited in many specifications). The reason is that forcibly terminating a thread will lead to abnormal termination of the program, incorrect release of resources, ...

Method function There are functions when you come into contact with the first program in Java. The main function is a function that specifies the writing method in Java: the main function is usually written in an open class, and the code in the main function is automatically generated when executing a java program. Definition of function: Fu ...

} } //If the tail node is null, enq is used to join the queue enq(node); return node; } //The synchronizer ensures the correct addition of nodes through an endless loop. After the node is set as the tail node through CAS in the "endless loop", //The current thread can only return from this method. Otherwise, the current thread ...