Programmer Group

Bridge Pattern Separate the abstract part from its implementation part so that they can all change independently. motivation When an abstraction can have multiple implementations, inheritance is usually used to coordinate them. Abstract classes define the interface of the object, while concrete subclasses are implemented in different ways. B ...

What is a proxy The proxy pattern is a common java design pattern. It is characterized by the same interface between the proxy class and the delegate class. The proxy class is mainly responsible for preprocessing messages, filtering messages, forwarding messages to the delegate class, and postprocessing messages for the delegate class.The ...

Introduction - overview of strlen I accidentally scan the code in glibc strlen.c, which I can't forget for a long time. I also remember the starting point in my unknown programming career: Programming is not a joke, some are difficult, some are reluctant to give up. Review with the track, once the most familiar feeling of strlen~ /* Copyright ...

Build microservice framework (database persistence layer spring datajpa) Used to Mybatis, this time for a change, integrate spring datajpa in SQuid. Source address: Build microservice framework (database persistence layer spring datajpa) Github address: SQuid introduce I've heard of HibernateJPA before, but I've never used it. Mybatis i ...

What is thread deadlock Deadlock is a kind of blocking phenomenon caused by two or more processes (threads) competing for resources or communicating with each other during the execution process. If there is no external force, they will not be able to move forward. At this time, the system is said to be in a deadlock state or the system generate ...

preface Beijing Renmin Jincang Information Technology Co., Ltd. (hereinafter referred to as "Renmin Jincang") is a domestic data management software and service provider with independent intellectual property rights. Founded in 1999 by a group of experts from Renmin University of China who are the first to carry out database teaching, ...

Using logback instead of log4j is because logback is another open source log component designed by the founder of log4j. The kernel of logback has been rewritten and its performance has been improved by more than 10 times on some key execution paths. Moreover, the logback not only improves the performance, but also reduces the initial memory lo ...

Spring Shell Sometimes, in order to facilitate the development and testing of the server, it does not need a beautiful user interface, just use a simple command window. As follows: Here is a quick, convenient, easy-to-use and simple interactive command window development component Spring Shell Yes, it's in spring ecology again. Source address ...

ArrayList should be one of the most common list implementation classes in your usual code. It should be a surprise to learn more about common methods by looking at the source code, as well as infrequent ones.This time, look at the corresponding source in terms of method familiarity, it is necessary to paste the source. 1. ArrayList header com ...

As we all know, Java is a high-level language in the programming language. In the world of java, there have been predecessors who have encapsulated various useful frameworks, tool classes and so on for us. The iterator mode that I want to talk about today has also been encapsulated. Is the for loop iterator that we often use.Or Iterator, these ...