Programmer Group

Annotation and reflection annotation What is annotation Annotation is a new technology introduced in jdk1.5.Function of Annotation: Not the procedure itself, the procedure can be explained;It can be read by other programs, such as compilers. Format of Annotation "@ annotation name" can also take parameters, for example: @Supp ...

RBAC (Role-Based Access Control) means that users are associated with permissions through roles. In short, a user has several roles, and each role has several permissions. In this way, the authorization model of "user role permission" is constructed. In this model, the relationship between users and roles and between roles and permiss ...

brief introduction AtomicStampedReference is an atomic class provided under the java concurrency package. It can solve ABA problems that cannot be solved by other atomic classes, such as AtomicInteger ABA problem ABA The ABA problem occurs in a multithreaded environment. When a thread reads the same memory address twice in a row and gets ...

This article is reproduced from the official account of "good future technology". The use of Flink CDC 2 is introduced in the case of Flink SQL, and the core design of CDC is interpreted. The main contents are as follows:caseCore designCode explanationGitHub address https://github.com/apache/flinkWelcome to like Flink and send star~In ...

1. Starter introduction Compared with spring, spring boot is much simpler in configuration. Its core lies in spring boot starter. When using spring boot to build a project, you only need to introduce the officially provided starter, which can be used directly without various configurations. Starter simply introduces some dependencies and initi ...

preface This article belongs to the column "100 problems to solve Java concurrency". This column is original by the author. Please indicate the source of quotation. Please help point out the deficiencies and errors in the comment area. Thank you! Please refer to table of contents and references for this column 100 problems to sol ...

Java cultivation program -- the 60th day of learning clock in Java introduction to mastery (60th day of punch in) Java 8 stream operation follow-up Time flies. I've been learning java for 2 months. In the first half of the month, I've delayed a lot of progress because of the review. I still have energy to spend on Algorithms and ...

[note] this article is translated from: [Beautiful World of Monads - DEV Community](https://dev.to/siy/beautiful-...)Let me start with the disclaimer. From the perspective of functional programming, the following explanation is by no means accurate or absolutely accurate. On the contrary, I will focus on the clarity and simplicity of the explan ...

1, IntroductionRecently, due to work, I came into contact with the framework a little more. It is inevitable to deal with Binder and sort out some relevant knowledge, but I was still a little flustered when preparing to write this article. Moreover, the complexity of the whole Binder mechanism can not be described clearly in a few words. I'm al ...

This article is excerpted from "design patterns should be learned this way" 1 encapsulate product creation details using simple factory mode Next, let's look at the code and take the creation of an online course as an example. Assuming that there are courses such as Java architecture, big data and artificial intelligence, an ecosyste ...