Programmer Think

catalogue 1, Package 1. Function of package: 2. How to declare a package? 3. How to compile packaged classes 4. How to run a packaged class 5. How to use the class of another package? 2, eclipse overview and basic interface 1. Installation steps 2. New project 3, Using eclipse: colors and fonts 4, Using eclipse: running and charact ...

Syntax analysis of turtle program 1. Library reference and import Tuttle Python drawing example code: import turtle turtle.setup(650.350.200.200) turtle.penup() turtle.fd(-250) turtle.pendown() turtle.pensize(25) turtle.pencolor("purple") turtle.seth(-40) for i in range(4): turtle.circle(40,80) turtle.circle(-40,80) turtle.circle(40, ...

First, build a simple test environment Build a springboot projectDependency is introduced, mainly web starter shiro (security authentication) and thymeleaf (simple page construction). There is no data layer query, so database related is not introduced. <dependencies> <dependency> <groupId>org.springfram ...

To write a daily report on the enterprise wechat every day, a robot is added to remind you to write a daily report regularly, so a local service is made. 1, Create enterprise wechat robot Click on the top right of the group to add a robot   The Webhook address above will be used in the next three steps 2, Create project 1.VS create a ne ...

1, Background   when we use the database, we will inevitably encounter the situation that the data is deleted by mistake, which may be business operation errors and code bug s; It may also be an operation and maintenance error, etc; However, we can divide all operations into the following categories: Data loss due to DMLData loss due ...

preface I only sent this article because I came to write a simple operation about git at the invitation of my friends yesterday. Friends used svn as version control before. Now the company uses git as version tool. Due to time problems, I will simply sort out the GIT commands commonly used in work to facilitate friends to attribute git c ...

preface: Recently, I want to do some gadgets related to raspberry pie. I found that some people will use raspberry pie personal blog to build websites. When building a personal blog site, I will use the intranet penetration technology provided by peanut shell, Natapp (which was modified by ngrok), Xiaomi ball and other platforms to access my p ...

preface Old iron / old fellow friends are good! What ah Chang shared today is the commonly used Lombok annotation, Official address，github address Who doesn't know this little pepper when doing Java development. Lombok is a tool that can help us simplify and eliminate some necessary but cumbersome Java code through simple annotation, so as ...

RocketMQwiki It is a distributed message and stream data platform with low latency, high performance, high reliability, trillions of capacity and flexible scalability. RocketMQ is the third generation distributed messaging middleware that Alibaba opened source in 2012. On November 21, 2016, Alibaba donated RocketMQ to Apache Software Foundation ...

catalogue 1, Getting started with python 2, python indent 3, Python comments 1) Single line note 2) Multiline comment 4, Python variables 1) Variable definition understanding 2) Variable name naming 3) Assign multiple values 4) Output variable 5) Global and local variables, global keywords 6) exercises 1, Getting started with pyth ...