Using invariance to solve concurrency problem

Using invariance to solve concurrency problem Invariance pattern We know that concurrency is the most likely cause of thread insecurity. The main reason is that there is data competition. If multiple threads read only and do not modify the same variable, there will be no thread safety problem. This idea is actually very simple, but it is also ...

Added by keevitaja on Thu, 10 Mar 2022 18:48:14 +0200

linux bg and fg commands

linux bg and fg commands Under linux, if we want a task or program to be executed in the background, we can use &. In fact, linux also provides commands for other task scheduling. bg: change a command suspended in the background to continue execution; [background background background]fg: transfer the command in the background to the fore ...

Added by radi8 on Thu, 10 Mar 2022 18:38:38 +0200

Compile JDK18 based on Linux

1. Overview JDK hasn't been compiled manually, dare you say you're a Java programmer? (Brother By Sheep- JDK hasn't been compiled manually, dare you say you're a Java programmer? Actual Compile Java Source (JDK Source, JVM) Video Tutorial_ Bell-Bell-Bell_ bilibili) Compiling JDK by hand is theoretically a better JDK for your computer Maybe it ...

Added by blacksheepradio on Thu, 10 Mar 2022 20:22:52 +0200

$tools, methods, jQuery properties and CSS

1, What exactly is the $symbol? $is the attribute defined for the window object in jQuery $and jQuery can be interchanged when used. In fact, it is a function, which comes from the jQuery library jQuery and $are used as an attribute of window             window.jQuery = window.$ = jQuery;             ...

Added by traffic on Thu, 10 Mar 2022 17:48:49 +0200

Linux Environment Configuration

Environment Configuration Linux 0 .vimrc #Create a new file in your own directory (~). vimrc vim ~/.vimrc #Add a text configuration (as follows... #Indicates how many spaces a tab shows by default 8 set tabstop=2 #Represents the length of the indentation that falls back when the backspace key is pressed in edit mode set softtabstop=2 #Re ...

Added by Christian B. on Thu, 10 Mar 2022 20:06:04 +0200

javaEE(SSM)-4: dynamic SQL

title: javaEE(SSM) learning notes 4: dynamic SQL Dynamic SQL import [main function]: splice SQL clauses according to different conditions or different data to achieve similar programming effect in XML files. [main element (mark)]: Query criteria: single branch if; Multi branch choose... when... other Special treatment: where /trim Up ...

Added by Benjigga on Thu, 10 Mar 2022 18:34:12 +0200