Quickly familiarize yourself with project code

For IT professionals, changing jobs or entering a new company often means getting familiar with a new development environment and quickly understanding new projects. How to quickly become familiar with the project code is a problem that every IT person will encounter, especially for fresh graduates who have just entered the IT workplace, this problem is even more difficult. Below are some of the methods I ended up with after going through several jobs. I would like to share them with you for your reference only!

1. Read through the requirements document to understand the purpose of the project;

An enterprise-level project will definitely keep some relevant documents! For example, requirements documents, design documents, project plans, etc. Read these documents thoroughly first to understand the purpose and main functions of the project.

　2. Be familiar with development tools and commonly used functions;

　The development environment used by each company will be somewhat different. It is necessary to be familiar with the new development environment and understand the commonly used functions, shortcut keys, etc., especially for developers whose usage habits are quite different. Environment, such as from MyEclipse to IntelliJ IDEA. The most commonly used development environments for Java include MyEclipse (Eclipse) and Intellij IDEA. C++ is used more frequently, from VC6 to VS2008, VS2010, VS2012, and VS2013, and some use open source development tools such as Qt.

　3. Deploy the environment and start the project;

　After understanding the development environment, deploy the relevant configuration and start the project. The benefits are: 1. You can further practice the new development environment; 2. After running the project, you can quickly understand the purpose and functions of the project.

　4. Browse the code as a whole and understand the code structure;

　Browse the code as a whole and have a grasp of the overall structure of the project code. It is best to draw the class diagram. You can use reverse engineering of some UML tools (such as EA, PowerDesign) to export the source code to the class diagram.

　5. Extract part of it and read it carefully;

　For an enterprise-level project, especially some large projects or projects with deep accumulation, you cannot be familiar with all the codes at once. Then select a part of it, such as one of the small functions, start from the interface, follow it step by step through debug mode, and get familiar with the entire project point by point.

　6. Try to modify some program bugs;

　Modifying bugs is the best way to become familiar with the project. According to the bugs that appear, use the debug mode to locate the location of the problem step by step, and then analyze the cause of the problem. When you can fix bugs and have fixed several bugs, it means that you have a certain understanding of the project and are basically familiar with the structure and logic of the project.