In Java development, code refactoring is a very important link. It can help us improve code quality, reduce code redundancy, and improve maintainability and performance. This article will share some experiences and suggestions on code refactoring, hoping to be helpful to Java developers.

1. Determine the goal of refactoring
   Before refactoring the code, you first need to clarify what the goal of the refactoring is. Is it to improve code readability? Or is it to improve performance? Or is it to fix bugs? Having clear goals can help us refactor in a more targeted manner instead of blindly making changes.
2. Use appropriate refactoring tools
   There are many excellent refactoring tools in the Java ecosystem, such as IntelliJ IDEA, Eclipse, etc. These tools can help us automate code refactoring, greatly improving the efficiency of refactoring. At the same time, these tools usually support undo functions to avoid unnecessary risks.
3. Continuous Refactoring
   Code refactoring is not a one-time task, but a continuous process. While the code is developing functions, we should always pay attention to the quality of the code and continue to refactor. This can avoid code "accumulation" and reduce later maintenance costs.
4. Reasonable division of code structure
   Good code structure is the basis for code reconstruction. We can reasonably divide the code according to functional modules, business logic, etc., put codes with similar functions together, split complex logic, and improve the readability and maintainability of the code.
5. Use design patterns with caution
   Design patterns are excellent code refactoring tools, but they need to be used with caution. Overuse of design patterns can cause code to become overly complex and increase maintenance costs. When refactoring, we should flexibly use design patterns according to specific situations instead of doing it perfunctorily.
6. Improve the testability of the code
   In the process of code reconstruction, we should consider how to improve the testability of the code. Reasonable code structure, dependency injection, modularization and other technologies can help us better conduct unit testing and integration testing, and improve the stability and reliability of the code.
7. Write clear comments and documentation
   Clear comments and documentation can help other team members better understand our code. When refactoring, we should pay attention to adding corresponding comments and documents to explain the logic and purpose of the code to facilitate others to read and maintain.
8. Regular code review
   Code review is an important part of ensuring code quality. It can help us discover potential problems and repair them in a timely manner. Through regular code reviews, we can discover code that needs to be refactored and optimize it in a timely manner.

In short, code refactoring is an indispensable part of Java development. It can help us improve code quality, improve performance, and reduce maintenance costs. Through reasonable goals, tools, continuous refactoring, reasonable division of code structure, careful use of design patterns, improving testability, writing clear comments and documentation, and regular code reviews, we can better refactor the code and Continuously improve code quality and development efficiency. I hope the above experience and suggestions can be helpful to Java developers in practical work.

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