Code Review Checklist and Best Practices in Java

Coffee Code Review Checklist

Lawmaking reviews, or peer reviews, can sometimes feel like an unnecessary chore, especially when there is a excess of features to piece of work on, leaving very little time for these reviews. Withal, transmission or automated reviews are essential to delivering quality code that provides a bully client experience.

This guide covers some of the virtually common items to bank check in a Java lawmaking review to ensure your lawmaking is reliable and piece of cake to read, maintain and scale.

1. Ensure the Code Follows Standard Naming Conventions

Meaningful naming conventions help ensure the readability and maintainability of the application.

As such, ensure variable, method, and course names convey the subject field:

addPerson()

Could exist clarified to:

addEmployee()

Employ all lower cases for package names and apply reversed Cyberspace domain naming conventions:

org/companyname/appname

Course names should start with Capitals:

Employee, Student,

Variable and method names should use CamelCase:

employeeList, studentName, displayEmployees()

ii. Brand Sure Information technology Handles Constants Efficiently

Constants assist improve retentivity every bit they are cached by the JVM. For values that are reused across multiple places, create a constant file that holds static values.

Favor database-driven values over dynamic values. Also, use ENUMs to group constants.

3. Coffee Code Reviews Should Check for Proper Clean Up

It is common during development to use procedures that help with your coding and debugging (hard coded variables, for example). It is skilful practice to remove these items and others such as:

• Panel print statements
• Unnecessary comments
• Use @deprecated on method/variable names that aren't meant for hereafter employ

4. Does It Handle Strings Appropriately?

If yous need to perform a lot of operations on a Cord, utilize StringBuilder or StringBuffer.

Strings are immutable, whereas StringBuilder and StringBuffer are mutable and can be inverse. Additionally, a new String object is created for every chain operation.

Rather than creating multiple items, using a mutable object is preferred.

v. Is it Optimized to Employ Switch-Case over Multiple If-Else Statements?

Rather than using multiple if-else conditions, utilise the cleaner and more readable switch-case.

Doing and so makes the logic cleaner and optimizes the app's performance.

switch(expression) {

case 10:

// code block

pause;

case y:

// lawmaking cake

break;

default:

// code block

}

6. Ensure the Code Follows Appropriate Error Handling Procedures

The NullPointerException is one of the most common and frustrating exceptions.

Even so, they can be avoided by performing a null check on a variable before operating on it.

The all-time practice is to use checked exceptions for recoverable operations and apply runtime exceptions for programming errors.

Some other expanse to evaluate during a Java code review is to ensure all exceptions are wrapped in custom exceptions.

In this way, the stack trace is preserved, making it easier to debug when things go incorrect.

Also, it should declare specific checked exceptions that the method throws rather than generic ones. Doing so doesn't give you the selection to handle and debug the result appropriately.

Avert this:

public void hello() throws Exception { //Incorrect way

}

Try this instead:

public void hi() throws SpecificException1, SpecificException2 { //Correct fashion

}

Utilize the try-catch cake for exception handling with appropriate actions taken in the catch block. Too, use a finally cake to release resource, such as database connections, in the finally cake. This allows you to close the resource gracefully.

seven. Does the Code Have Unnecessary Comments?

Comments should not be used to explain code. If the logic is not intuitive, information technology should be rewritten. Use comments to answer a question that the code can't. Another fashion to state information technology is that the comment should explain the "why" versus "what" it does.

8. Validate That the Code Follows Separation of Concerns

Ensure there is no duplication. Each grade or method should be small and focus on one matter.

For example:

EmployeeDao.java - Data access logic

Employee.java - Domain Logic

EmployeerService.java - Business Logic

EmployeeValidator.coffee - Validating Input Fields

9. Does the Code Rely on Frameworks Rather Than Custom Logic When Possible?

When time is of the essence, reinventing the wheel is time wasted. In that location are enough of proven frameworks and libraries available for the virtually common use cases you may need.

Examples include Apache Commons libraries, Spring libraries, and XML/JSON libraries.

10. Make Certain Variables Don't Crusade Memory Leaks

Creating a bunch of unnecessary variables can overwhelm the heap and pb to retentiveness leaks and crusade performance problems. This occurs when an object is present in the heap only is no longer used, and the garbage collection cannot remove it from memory.

Example:

Avert This

boolean removed = myItems.remove(item); render removed;

Try This Instead

render myItems.remove(particular);

Performing regular Java code reviews can assistance identify issues before the awarding makes information technology to production.

The more thorough y'all are about the process, the less chance you'll miss annihilation that could be added to your excess.

How Adservio Can Assist

Nosotros hope this blog post provides some valuable insight into what to check for in your review process. If your business needs assistance with defining a Java code review process, our squad can help.

Reach out to our team of professionals and learn how we tin can assist you accomplish your goals for quality awarding delivery.

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Source: https://www.adservio.fr/post/java-code-review-checklist

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