Programming VIP

1. Preface: for the small project written after learning Android for a month in 2017, the document has only been completed recently. The project and document are original and released to remember a few years ago. Due to the projects written in 2017, the code and technology are backward, but it can provide some ideas for writing similar projects ...

Multithreading What is a process A process is an application What is a thread A thread is an execution scenario / progression unit in a process A process can start multiple threads For java program, when entering in DOS command window: After entering the java HelloWorld. The JVM will be started first, and the JVM is a process At the same tim ...

catalogue 1. Brief introduction 2. Principle explanation 3. The code is as follows (including comments) 3.1 obtain DiskFileItemFactory object Get fileservlet2.3 object 3.3 uploading files 3.4 doPost() 4. Operation results 1. Brief introduction In a web project, it is very common for users to upload files to the project, such as a ...

prepare Download idea2019 3.5 install and activate (see the compressed package sent by brother chicken in the group for specific steps). Pull spring 5 3.5 source code (tips: it is recommended to start with Star and then Forked, and then go back to the project warehouse of your account and then pull): https://gitee.com/hhf1237/spring-framewor ...

preface This article briefly introduces the BOM object and DOM object of JavaScript, as well as the related methods and usage. catalogue 1, DOM object simple learning 2, Events 2.1 simple learning of events 2.2. Event monitoring mechanism         Case: bulb switch: 3, BOM object 3.1. BOM object concept: 3.2 composition         Case: ...

1. Why should we optimize the jvm? In the local development environment, we rarely encounter the need to optimize the jvm, but in the production environment, we may have the following requirements: The running application is "stuck", the log does not output, and the program does not respond The CPU load of the server suddenly incr ...

1, Introduction 1.1 introduction to SMC    SMC is a state machine software code generation tool developed in Java. SMC supports a variety of development languages: C, JavaScript, Python, C + +, Lua, Ruby, c#, Objective-C, Scala, Groovy, Perl, TCL, Java, PHP and VB Net, and what we need to do is to complete one sm's script and th ...

1. Understand the method System.out.println("Request protocol name:"+req.getProtocol()); System.out.println("Request method:"+req.getMethod()); System.out.println("Application context path/App Name:"+req.getContextPath()); System.out.println("Resource path/servletPath: "+req.getServletPath()); System.out.println("The key in the request h ...

Open Policy Agent (OPA) is an open source lightweight general policy engine, which can replace the built-in policy function module in the software to help users realize the decoupling of service and policy engine. Benefit from OPA Perfect ecosystem , users can easily integrate OPA and other services, such as program library, HTTP API, etc. As ...

Recently, many small partners told me that they have learned a lot of JVM tuning knowledge, but they don't know when to tune the JVM in practical work. Today, I will introduce several JVM tuning scenarios. When reading this article, it is assumed that you have understood the data area and common garbage collection algorithms at runtime, as ...