Refactoring techniques in Java language

The Java language is an object-oriented programming language. Due to its rich class library and cross-platform features, it has received more and more widespread attention and use. However, although the Java language allows us to quickly build relatively simple applications, once the application becomes complex, we will find that maintenance and development become increasingly difficult to handle. As our code becomes more and more complex, we are likely to encounter some problems, such as code duplication, too long methods, unclear class responsibilities, etc. These problems will make the code difficult to maintain and expand, and affect the complexity of the code. Usability and readability. In order to solve these problems, we need to use some refactoring techniques to optimize and upgrade the code.

The following is a list of some commonly used refactoring techniques in the Java language:

1. Extract Method

Extract a piece of code , as an independent method, this can improve code reusability, reduce code redundancy, and make the code more readable. After the method is refined, the code can be made more modular to facilitate subsequent maintenance and modification.

2. Inline Method

Inline a method that is called only once to its calling site, which can reduce the access overhead of the code (because Calling a method requires opening a stack frame).

3. Rename

When naming classes, variables, methods, etc., you need to pay attention to using clear and readable names. Renaming technology can help us modify the names of methods, properties, and variables to improve the readability and understandability of the code. After renaming, the code can be made easier to understand and facilitate code maintenance and upgrades.

4. Abstract Class & Interface (Extract Class & Interface)

Abstract classes and interfaces can abstract a set of related methods and properties into a class or interface, which can reduce Reduce code complexity and improve code readability and maintainability. Using interfaces can achieve class polymorphism, reduce code coupling, and improve code scalability.

5. Move Method

When different classes have the same methods, these methods can be extracted into a separate class, so that Interfaces between classes are simplified and code is easier to reuse. Moving methods can reduce class coupling and improve code scalability.

6. Eliminate code duplication (Remove Duplication)

Eliminating code duplication is one of the effective methods to improve the scalability, readability and maintainability of the code. . You can use techniques such as refining methods and template methods to eliminate code duplication.

7. Encapsulate Field(Encapsulate Field)

Using encapsulate field technology can control the access permissions of class attributes, and can check the validity of assignment of attributes, which can prevent Properties are modified unexpectedly, thus improving code stability. Encapsulated fields can also implement read control of attributes, making class modifications easier.

Refactoring techniques in the Java language can improve the readability, maintainability and scalability of the code, and are a part that cannot be ignored in our software development process. By using these techniques for code optimization, the code can be made clearer and easier to understand, thereby reducing code development and maintenance costs, improving software quality, and bringing us a better user experience.

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