Programmer Think

Hello, I'm CharlieToday we share a gadget, which is mainly used for downloading videos from station B. you can download them locally by entering the web address of the corresponding video.catalog:Principle introductionWeb page analysisVideo crawlingDeposit locallyGUI tool makingComplete code1. Principle introductionThe principle is very simple, ...

Share Java NET, Javascript, efficiency, software engineering, programming language and other technical knowledge.This article GitHub TechShare Included, no advertising, Just For Fun.Why did you write this article?I believe many Java developers have used objects like ApiResult to wrap Api return types in projects, which is better than not wrappi ...

1 Introduction background and principle of fastthreadlocal Since jdk already has a ThreadLocal, why should netty create a FastThreadLocal? Where is FastThreadLocal? This needs to start with jdk ThreadLocal itself. As shown below: In java threads, each thread has a ThreadLocalMap instance variable (if ThreadLocal is not used, this Map will ...

This article mainly introduces how to learn and know Netty quickly. You can also understand it as learning introduction and quick start. It is strongly recommended that you collect this article for future reference. Netty netty It is a high-performance, elastic and extensible asynchronous event driven network application framework based on NI ...

1. Packaging java.lang package. Basic data types are easy to use and efficient. But there is no corresponding method to operate it. Use a class to wrap the basic type data. This class is called the wrapper class. The wrapper class defines methods for manipulating basic type data. 1.1. Package type corresponding to basic data type (java.la ...

The concurrent programming technology is a necessary knowledge in the development of Internet applications. The author of this article starts to analyze thread pools to gain a better understanding of concurrent programming in Java. * Above Thread Knowledge Compilation for Java Concurrent Programming The purpose and benefits of threads have bee ...

Column navigation Elegant Java (zero) -- problem oriented learning preface We talked about several example methods of single example before Let's take a broader perspective. In fact, Java is often designed from top to bottom. First specify the interface, specify the parent class, formulate standards, and then consider how to implement it ...

Comprehensive practice of C + + programming (Zheng Li) in Tsinghua University preface In the comprehensive practice of the course, the simulated bank is realized. Users can add savings and credit card accounts and deposit and withdraw money from the accounts. The savings accounts are settled on January 1 every year and the credit card a ...

After learning the knowledge of object-oriented programming syntax and simple data structure sequence table, we can now use these knowledge to comprehensively implement a library management system to test the mastery of the previous knowledge and practice the actual coding ability of the code, so as to further understand Java development. We do ...

Face to face questions What are the similarities and differences between abstract classes and interfaces? If two objects are different, their hash code s must be different? Small error, same probability If the hash code s of two objects are different, the objects must be different What should I pay attention to if I rewrite equals? If you ...