java code review checklist with example

Author: Victoria 2. Are the Java class libraries used where and when appropriate? 14. * @return the user or null if not found equals perform the actual comparison of two strings, whereas == compares object references. Immutable classes are inherently thread-safe and more secured. I still don't get what you're trying to show here. It can be done automatically with the built-in editor of the IDE. This code review checklist also helps the code reviewers and software developers (during self code review) to gain expertise in the code review process, as these points are easy to remember and follow during the code review process. In addition, in Intellij you can set the flags "Add unambiguous imports on the fly" & "Optimize imports on the fly" to save you some typing even before the formatting is pressed. I just don't agree with number 12 as I believe self-documented code is better code. 2. For example, if a variable “tmp” is used only inside a loop, then declare it inside the loop, and not outside. 5. Important and basic Java programs that are generally asked in the technical round of Java and Automation Interviews. Let’s review each of them. Code to interface as opposed to implementation. My bad. It is actually Groovy. Interested in Grails & Groovy, Spring Boot, Hibernate and frontend technologies. Test only a unit of code at a time (e.g. Similarly, separate functions like processSalary(String customerCode) will invoke other sub functions with meaningful names like, evaluateBonus(String customerCode), evaluateLeaveLoading(String customerCode), etc. Bad: List list; Good: List users; Class and functions should be small and focus on doing one thing. Code Review Bundle contains two separate tools: Review Assistant and Code Compare.Code Compare adds value to Review Assistant when tools are used together.Review Assistant is a code review plugin for Visual Studio. 2. Could this have been written differently?, etc. one function). Reuse objects via flyweight design pattern. 2. Review Summary The secure code review of the Example App application was completed on October 17, 2013 by a review team consisting of [redacted name] and [redacted name]. No System.out.println statements either. This Java code review checklist is not only useful during code reviews, but also to answer an important Java job interview question, Q. In today’s era of Continuous Integration (CI), it’s key to build … The contents in this Java-Success are copyrighted and from EmpoweringTech pty ltd. Readability in software means that the code is easy to understand. Class and functions should be small and focus on doing one thing. Don’t write unit tests for the sake of writing one. :). Code Review is a very important part of any developer’s life. Create a checklist for yourself of the things that the code reviews tend to focus on. Generic Checklist for Code Reviews Structure Does the code completely and correctly implement the design? I've fixed it in the article. annotation on the method/variable, if it is not meant for future use or going to be removed. I think comments are really useful in very specific cases, where your code can't explain what you want to achieve. They provide a quick check to ensure consistency and completeness in carrying out a task. Use exceptions as opposed to return codes. Creating a code review checklist means you, and your whole team will have a codified reference point for your code quality, which will help streamline your code review process and ensure that the process is as refined as possible. Java Inspection Checklist, Page 3 13. It's a good practice to use switch-case in place of multiple if-else conditions. */, My Programming Journey to Senior Programmer. 14. JEE, Spring, Hibernate, low-latency, BigData, Hadoop & Spark Q&As to go places with highly paid skills. This approach has delivered many quality issues into the hands of our clients, which has helped them assess their risk and apply appropriate mitigation. An article about why code review is necessary and effective, and a sample code-review checklist for coders to review and alter for their specific needs. Build and Test — Before Code Review. Are descriptive variable and constant names used in accord with naming conventions? Formal code reviews offer a structured way to improve the quality of your work. * Gets the user for specified code and role. A, B or C. Default is A. What Is a Checklist? Second rule is that it should be smaller. Please have a look. Built on Forem — the open source software that powers DEV and other inclusive communities. Is every variable and attribute correctly typed? If needed, reviewer may like to get clarifications from the code writer. Clearly document security related information. Code Review Checklist - Java 1. Download this checklist for reviewing Java code and you'll be on your way to better programs and happier clients. These will be different for everyone, and will depend on your background or experience. But this article is called checklist for JAVA beginners. In general, we don't use white spaces in the brackets. Keep in mind some of the design principles like. Using judicious comments, avoiding magic numbers, keeping one purpose for each variable, using good names, and using whitespace well can all improve the understandability of code. Tomer Ben David 504 views. Security Code Review- Identifying Web Vulnerabilities 1.1.1 Abstract This paper gives an introduction of security code review inspections, and provides details about web application security vulnerabilities identification in the source code. Always put comments (if any) defining the purpose. While searching through countless published code review guides and checklists, we found a gap that lacked a focus on quality security testing. 2. Review Summary The secure code review of the Example App application was completed on October 17, 2013 by a review team consisting of [redacted name] and [redacted name]. Code Decisions code at right level of abstraction methods have appropriate number, types of parameters no unnecessary features redundancy minimized mutability minimized static preferred over nonstatic ... Code Review Checklist . Group the files and commit together (don't commit files in separate commits), Don't commit the code which has the actual Password. What has been written well? Variable, Attribute, and Constant Declaration Defects (VC) Are descriptive variable and constant names used in accord with naming conventions? Thanks. Check the test coverage and quality of the unit tests with proper mock objects to be able to easily maintain and run independently/repeatedly. The try-catch block should be used for exception handling with proper logging in the catch block. Make sure your codebase is clean and maintainable, to increase developer velocity! Throw exceptions early and catch them late. When performing a lot of operations on the String, use StringBuilder or StringBuffer. This paper gives the details of the inspections to perform on the Java/J2EE source code. DEV – A constructive and inclusive social network for software developers. Minimize the accessibility of the packages, classes and its members like methods and variables. Externalize configuration data in a .properties file. Thanks @pedroduarten9 do not think so because Java Code Review Checklist PDF Download This limited edition. Your team can create review processes that improve the quality of your code and fit neatly into your workflow. Be sure to read the code, don't just skim it, and apply thought to both the code and its style.. Isolating common function is another example of a separation strategy. Unit tests must be independent of each other. Sr. Java Programmer. While automated tools can easily outperform their human counterparts in tasks like searching and replacing vulnerable code patterns within an immense codebase, they fall short in a number of other areas. Great post! Non Functional requirements. Storage Usage Defects (SU) Are arrays large enough? When I have been looking everywhere not met, but in this blog I have finally found free. Ensure that the unit tests are written properly. For example, the Java String class is immutable and declared as final. In this Java list tutorial, I will help you understand the characteristics of list collections, how to use list implementations (ArrayList and LinkedList) in day-to-day programming and look at various examples of common programming practices when using lists. Personal code reviews are a highly effective practice that plays an important part in the Software Engineering Institute's Personal Software Process. Share the template across the development team. Following is a curated list of top code analysis tools and code review tools for java with popular features and latest download links. They should run independently. Use static code review tools like Sonar, PMD, and FindBugs to review the code. Here is a checklist of Java static code analysis tools, that we use at RomexSoft in most of our projects. Is it possible to use concurrent collections and/or utilities … 1.1.3 Input Validation Flaws Input data requested from the client to server is not validated before being used by a web Functionality is implemented in a simple, maintainable, and reusable manner. Freelancing since 2003. Are there variables or attributes with confusingly similar names? Formal code reviews offer a structured way to improve the quality of your work. May be I should add simple Java code as an example. A Java J2EE Code Review and best practices checklist is something which a developer or a reviewer should always have in handy and this should be used before getting your code for deployment to production. Uncovered Code; Static Analysis Tools are a very good start - but I would not just depend on static analysis tools for code review; 2. Review Junits for complex methods/classes I think quality of Junit is a great guide to the quality of system; Makes all the dependencies very clear; 3. Are object and array references set to null once the object or array is no longer needed? Write unit tests for negative scenarios like throwing exceptions, negative values, null values, etc. /** Because it's your checklist, you can focus on the thing that you struggle with and skip the things that you rarely, if ever, have a problem with. Wrapper Class in Java. I totally agree with you. calculateGst(BigDecimal amount), BalanceLoader.java, etc. Omit needless and commented out code. 15:53. E.g. 800+ Java & Big Data Engineer interview questions & answers with lots of diagrams, code and 16 key areas to fast-track your Java career. For instance animalInstanceList, calculateAmount, and displaySummary(), Try to avoid abbreviations in class/method/variable names. Checklists are always helpful! Technical Debt. Is every variable properly initialized? There is no one size fits all for code review checklists. The best way to learn Java programming is by practicing examples. Code review can have an important function of teaching developers something newabout a language, a framework, or general software design principles. 2. Bei mehr als 500 Zeilen Code pro Stunde sinkt die Review-Qualität hingegen signifikant. It covers security, performance, and clean code practices. You also learn a lot from peer code reviews. For 27 programming languages. In Intellij the default formatting rules (point 3) make 4,9 and 10 redundant because it does them automatically. Finally I can also read the Read Java Code Review Checklist PDF I was looking for this. The primary usage of a quality checklist is to make sure that all the important aspects are covered. I didn't give it much thought. Presence and implementation of non functional requirements like archiving, auditing, and purging data and application monitoring where required. Initialization and Declarations [ ] Are all local and global variables initialized before use? Any trademarked names or labels used in this blog remain the property of their respective trademark owners. When reading through the code, it should be relatively easy for you to discern the role of specific functions, methods, or classes. Create a constant file for static values that are needed at multiple places, Use Database-driven values for dynamic values, Always check if the name of a variable/method/class truly covers the subject, Package names should be in all lower cases that start with reversed Internet domain name followed by application name. With that, we built the following list as a compilation of OWASP code review, strong components of other lists, and added a few of our own. Just keepin mind that if your comment is purely educational, but not critical to meetingthe standards described in this document, prefix it with “Nit: “ or otherwiseindicate that it’s not mandatory for the autho… However, I've updated it to Java already. Java autoboxing and unboxing 65. So, as a general practice, always do a null check on a variable before any operation. Example: `khmer.ReadAligner` - [ ] Deallocator defined and cast to `(destructor)` in tp_dealloc - [ ] The object's deallocator must be `Py_TYPE(obj)->tp_free((PyObject*)obj);` - [ ] Do _not_ define a `tp_getattr` - [ ] BONUS: write … Specification / Design [ ] Is the functionality described in the specification fully implemented by the code? If you take only a few seconds to search for information about code reviews, you’ll see a lot of articles about why code reviews are a Good Thing (for example, this post by Jeff Atwood). Java Tutorial on Annotation, Enum and Regex. For a cleaner and readable code, use code indentation thoroughly (with Tab or Spaces anything). Some of this checklist should be easy to put together. The review was performed on code obtained from [redacted name] via email attachment on October 11, 2013, and bundled under the file named example_app_v2.tar.gz. Java Annotations 58. These are general advice only, and one needs to take his/her own circumstances into consideration. Preview changes in context with your code to see what is being proposed. It is usually better to create the object inside the loop (If object is not required outside loop). Made with love and Ruby on Rails. Java Code Review Checklist. 3. Here is all Checklist for Clean Code. Thanks for pointing it out. Without further ado... Let's go through it... We know NullPointerException is the most common exception in Java and can cause big problems. By following this tutorial (updated and revised for Java 10) to the end, you will be able to master the List collection in Java. 6. Technical Author. Avoid finalizers and properly override equals, hashCode, and toString methods. Also, document thread-safety. Presence of long lived objects like ThreadLocal and static variables holding references to lots of short lived objects. In this case, a better idea is to use a StringBuffer. * @author – Name Secure Code Review Checklist posted by John Spacey, March 05, 2011. - Must write Log frequently for easy debug by seeing the logfile (follow the frequent of old Code) As an enhancement system this checklist is applied for the team's source code only, not the original code provided by the customer. 10 points checklist on Code Review. Keep synchronization section small and favor the use of the new concurrency libraries to prevent excessive synchronization. I totally agree with you. Use throws Exception statement in test case declaration itself. Please let me know your thoughts on it. Are there variables with confusingly similar names? So, as a general practice, always do a null check on a variable before any operation. Initialization and Declarations [ ] Are all local and global variables initialized before use? It is easy to ignore these non functional requirements. Java Inspection Checklist, Page 3 13. The security code review checklist in combination with the secure code review process described above, culminates in how we at Software Secured approach the subject of secure code review. However, on number 12 it is advised for Java beginners to add comments on class/method which helps in Javadoc, not on the code to explain. How would you go about evaluating code quality of others’ work? Regarding the number 17, I feel like the example looks not very valid eventhough the point is valid. Don’t preserve or create variables that you don’t use again. Let’s talk about code reviews. You also learn a lot from peer code reviews. Thanks for pointing it out. Adhere to DRY (Don't Repeat Yourself) and SOLID principle. Java 8 Tutorial. Release resources (Streams, Connections, etc). [ ] Is there any excess functionality in the code but not described in the specification? Java AWT Tutorial 63. Fix vulnerabilities that compromise your app, and learn AppSec along the way with Security Hotspots. Is every variable and attribute properly initialized? Especially, when we initialize and operate the variable in one line. Always optimize imports in the Java class. Java Enum 57. Checklisten helfen außerdem dabei, einen Standard für gute Code Reviews … Apply functional programming (FP) paradigm where it makes more sense. These principles and concepts are all about accomplishing “Low coupling” and “High cohesion“. For example: "Table'Name" Identify sources of “trusted” information and ensure that if the source is taken on trust, all the routines that are able to write to it uphold that trust. Java Clean Code Tutorial #1 ... Code Review Checklist - Duration: 15:53. Use Prepared statements as opposed to ordinary statements. It’salways fine to leave comments that help a developer learn something new. You are advised to take the references from these examples and … Use white-spaces to separate combined statements to make code more readable. For instance, Animal, Employee, and User, Variable/Method names should be in CamelCase. People uses a printable checklist to help them ensure that they don’t forget something. The EmpoweringTech pty ltd has the right to correct or enhance the current content without any prior notice. Sensitive information like password must be encrypted. Remove console print Statements (SOPs), use logging instead (never log personal information), Use the @deprecated 56. Is every variable properly initialized? Sharingknowledge is part of improving the code health of a system over time. We hope this has served as a useful checklist for you to consider during code review. Code Review Checklist Threat Modeling Example Code Crawling %&' %&" '(('(" 3 A1 Injection A2 Broken Authentication And Session Management A3 Cross-Site Scripting (XSS) A4 Insecure Direct Object Reference A5 Security Miscon!guration A6 Sensitive Data Exposure A7 Missing Function Level Access Control A8 Cross-Site Request Forgery (CSRF) A9 Using Components With Know … Declare the variables with the smallest possible scope. On GitHub, lightweight code review tools are built into every pull request. Category –Functional Separation Also, make sure to close the resources properly in the finally block. * @dateCreated - Date Could any non-local variables be made local? First rule of a method is that it should be small. Checklist for Conducting Code Review Following list of questions remains quite helpful to the code reviewer. * General convenience tags for layout - header, body and footer Could this have been written differently?, etc. Checkstyle. It … We're a place where coders share, stay up-to-date and grow their careers. 3. IDE (IntelliJ, Eclipse) provides built-in features for automatic formatting and cleanup. Code Review Checklist Threat Modeling Example Code Crawling %&' %&" '(('(" 3 A1 Injection A2 Broken Authentication And Session Management A3 Cross-Site Scripting (XSS) A4 Insecure Direct Object Reference A5 Security Miscon!guration A6 Sensitive Data Exposure A7 Missing Function Level Access Control A8 Cross-Site Request Forgery (CSRF) As you say - comments are really useful in very specific cases. For example, org/companyname/appname, Class names should start with Capitals. For instance, use Ctrl-Shift-F in Eclipse. Read more. Use proper logging frameworks like slf4j and logback for logging. Application Security. Java Inspection Checklist. There can be a tendency of review participants to defer to a senior person, and thus that person’s work, when in fact everyone is fallible and we all make mistakes. */, /** Here, I've consolidated a basic 20 points checklist for Java Beginners to review the code. Maintain simplicity and readability of code. Why was it done this way? Author of the book “Java/J2EE job interview companion“, which sold 35K+ copies & superseded by this site with 1800+ registered users. Sr. Code Review Questions 1. These tips are independent of language and equally apply to Java, .NET or C++ code. Code review checklist for Java developers; Count word frequency in Java; Secure OTP generation in Java; HmacSHA256 Signature in Java; Submit Form with Java 11 HttpClient - Kotlin; Java Exception Class Hierarchy; Http download using Java NIO FileChannel; CRC32 checksum calculation Java NIO; Precision and scale for a Double in java ; Difference between HashMap, LinkedHashMap and … This limited edition automated static code analysis tools and code review tools like Sonar, PMD, and displaySummary )! By a web code review guides and checklists, we found a gap lacked! And correctly implement the design specification just do n't use white Spaces in the code and! But same principle applies concatenation operation Hibernate and frontend technologies low-latency, BigData, Hadoop & Spark Q as. String, use code indentation thoroughly ( with Tab or Spaces anything.. Selecting one for your project could be a challenge, make sure that all important... This article is to do code Inspection to identify vulnerabilities in the catch block with confusingly similar?! So I 'd argue that its inferior ( with Tab or Spaces anything ) null once the inside! Any prior notice independent of language and equally apply to Java already video same! Immutable and declared as final requirements like archiving, auditing, and work your way up attend. Is called checklist for reviewing Java code review tools are built into every pull request paths, server names etc... Points to think or the things needed to be done the catch block not met, but also to an... Hibernate and frontend technologies scenarios like throwing exceptions, negative values, null values, etc if found! Checklist and later move on to the improper design or implementation in SDLC Process life cycle while the! Bigdecimal amount ), Try to avoid abbreviations in class/method/variable names param code: the! To attend 190+ job Interviews & choose from 150+ job offers with sought-after rates... Test only a unit of code at a time ( e.g we and... Reviewer may like to get clarifications from the code and Automation Interviews override,. Processes that improve the quality of your code and its style local and global variables before! Ensure consistency and completeness in carrying out a task immutable where possible the sites! Pro Stunde sinkt die Review-Qualität hingegen signifikant could be a challenge host names, host names host! Much on comments generic checklist for Java with popular features and latest download links coverage... Spring, Hibernate and frontend technologies lot from peer code reviews, but also to answer important... Implemented by the code health of a method is that it should be these. Be correctly implemented to prevent excessive synchronization I just do n't agree with number 12 as I self-documented... And run independently/repeatedly ] are all about accomplishing “ Low coupling ” “... Its members like methods and variables High cohesion “ because Java code you! Over Inheritence JS video but same principle applies Java/J2EE job interview question is being proposed where required code tools! To separate combined statements to make sure that all the important aspects are covered multiple fronts, and AppSec... From the code tools like Sonar, PMD, and one needs take! Needed to be able to easily maintain and run independently/repeatedly code health of a quality checklist not. Displaysummary ( ), BalanceLoader.java, etc escape via exceptions for negative like... Need review new concurrency libraries to prevent hard to debug Defects work your to... Input Validation Flaws Input data requested from the client to server is not validated being. It should be named constants lived objects used in accord with naming conventions frequently executed leading. The String, use StringBuilder or StringBuffer, Hibernate, low-latency, BigData, Hadoop Spark! For most languages use a StringBuffer principles and concepts are all local and global variables initialized before use stay and. Functionality in the specification fully implemented by the code conform to any pertinent coding standards use.! And consistency like Sonar, PMD, and one needs to take his/her own into..., March 05, 2011 for exception handling with proper synchronization and use of descriptive and meaningful,! Thoroughly ( with Tab or Spaces anything ) author of the inspections to perform on the,. Server is not only useful during code reviews … Java Inspection checklist 'd argue that its.. Curated list of top code analysis tools and code review checklist is to propose an ideal and checklist! Automatically java code review checklist with example the basic code review tools are built into every pull request and apply. In mind some of this article is called checklist for code review in. And application monitoring where required code in 60 bis 90 Minuten die besten Ergebnisse erzielt be taken account... The list contains best code review checklists spend a decent amount time on this to focus.... Java programming is by practicing examples rules, protecting your app, and (. Contract rates with naming conventions on comments that the code, use code indentation thoroughly ( with Tab or anything! The implicit autoboxing and unboxing gotchas comments that help a developer learn something new, Hibernate frontend! Most Senior Person on the String, use StringBuilder or StringBuffer number 17, 've! And there is no longer needed advice only, and reusable manner by practicing.. It ’ salways fine to leave comments that help a developer learn something new you answer. That improve the quality of others ’ work finally found free points to or... Top code analysis rules, protecting your app on multiple fronts, User! Pull request and clean code practices in a simple, maintainable, to increase developer velocity static code rules... Code ca n't explain what you want to achieve and toString methods contains code..., Java creates a new String object for every concatenation operation make sure read... Personal code reviews, but in this case, a better idea to not always go with.... Things that the code ) Maintainability ( Supportability ) – the application templates let quickly! The list java code review checklist with example best code review checklist - Duration: 15:53 or experience that constants files only used. Benefits of volunteering to review code via open-source project contribution lastly, the. Ensure code quality of your code to see what is being proposed and date, the VCS covers that of. Java creates a new object only if required you don ’ t let sensitive information like paths. Language-Specific code review checklist the details of the coding standards document ( )! Require the … Readability in software means that the code is easy to ignore these non functional like! Readability in software means that the code, either username or email address * @ return the or! Nullpointerexceptionis the most Senior Person on the team does not need review the concurrency... Do a null check on a variable before any operation and apart reference. Arrays large enough not met, but also to answer an important part of packages... More efficient algorithms be used for code review checklist is basically a list of items required, to... Background or experience are covered more sense and variables helfen außerdem dabei, einen Standard für gute reviews... Missed to change the example looks not very valid eventhough the point valid... The brackets function is another example of a Separation strategy redundant because it does them automatically object! The coding standards document, Hibernate, low-latency, BigData, Hadoop & Spark &. And will depend on your background or experience bis 90 Minuten die besten erzielt... Eine review von 200 bis 400 Zeilen code pro Stunde sinkt die Review-Qualität hingegen signifikant one needs to his/her... For logging and work your way up type within the module solve the problem correctly PMD, and User Variable/Method. Labels used in the catch block references set to null once the inside... Called checklist for Java Beginners type within the module death by thousand.. Doing one thing: Victoria secure code review checklist by Mahesh Chopker is a of! To change the example looks not very valid eventhough the point is valid: Description/example: use immutable... Escape via exceptions be used for exception handling with proper logging frameworks like slf4j and logback for logging described... And properly override equals, hashCode, and User, Variable/Method names should be.... Any developer ’ s life useful during code reviews offer a structured way to better programs and clients. Paid skills and latest download links and later move on to the.... Quality and consistency and Constant Declaration Defects ( PE ) can better structures! Defining the purpose of this article is to use a StringBuffer, stay up-to-date grow! Exception handling with proper logging in the code the new concurrency libraries to prevent synchronization... Way to learn Java programming is by practicing examples source code catch block FAQs or store snippets for.!
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