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1.1 process: it is a running program It is an independent unit for system resource allocation and call;Each process has its own memory space and system resources. 1.2 thread: it is a single sequential control flow that is often summarized by people and you. It is an execution path Single thread: if a process has only one execution path, ...

ThreadLocal ThreadLocal means thread local variable, which is used to solve the problem of accessing shared variables when multiple threads are concurrent. The so-called shared variables refer to instances, static attributes and arrays in the heap; Access to shared data is controlled by Java's memory model (JMM), which is as follows: [refe ...

1, Aop Aspect Oriented Programming is a supplement to object-oriented thinking. Aspect oriented programming is to dynamically enhance the function of the method without changing the program source code when the program is running. There are many common use scenarios: journalTransaction -- common code extractionDatabase operation... The ...

I am Xiao Hei, a programmer who "lingers" on the Internet Pay attention to the official account of the same name [Xiao Hei Java], more dry cargo content is served first, and more occasional lottery offers. Running water doesn't compete first. It's important to talk preface No matter a white programmer, CRUD BOY who has worked ...

catalogue requirement design sketch Brief explanation of function realization Some methods code requirement At the end of the year, I suddenly remembered that I hadn't published an article this semester. Think about sending something. I saw the demand for a java applet in a group yesterday. I have nothing to do today. I also wrote a ...

preface Performance tuning of Java virtual machine is a very broad topic and a very difficult process in practice. Because it needs a systematic optimization method and clear optimization expectations. The default JVM parameters attempt to provide acceptable performance in most cases; However, depending on the behavior of the application and t ...

Overview of Spring What is spring Spring is a lightweight open source framework for layered Java SE/EE applications, IoC (Inverse Of Control) and AOP (aspect oriented programming: Aspect Oriented Programming) as the kernel, it provides many enterprise application technologies such as presentation layer spring MVC, persistence layer Spring ...

Select the type of statement There are two kinds of selection statements in c language 1. if else statement 2. switch statement As the name suggests, we will face some choices. If the selection is correct, it will be executed, otherwise it will not be executed c language is a structured programming language There are sequential struct ...

Recently, the project encountered a small requirement that the file name is provided by the back end when the front end downloads a file (it turned out that the front end writes the file name dead). Our project architecture is SpringBoot+React (TypeScript). I looked at the back-end code and inserted the file name into the header of the response ...

Factory mode Factory Pattern is one of the most commonly used design patterns in Java. This type of design pattern is a creation pattern, which provides the best way to create objects. In factory mode, when creating objects, we do not expose the creation logic to the client, and point to the newly created objects by using a common interface. i ...