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How do different Maintainability Index variants perform when utilized for maintainability measurement between versions of the same software system? However, we've used String constructor to create the strings. Remember: When we override the equals() method, it is necessary to override the hashCode() method. 1) By Using equals () Method The String class equals () method compares the original content of the string. Learn to code interactively with step-by-step guidance. Visual StudioMaintainability Index. Fedoseev, K.; Askarbekuly, N.; Uzbekova, E.; Mazzara, M. Application of Data-Oriented Design in Game Development. When possible, the parameter settings of the data analysis method used were provided to the reader to give a better understanding of the analysis. How to add an element to an Array in Java? Although different Index variants present different values when subjected to the same software system, the Index variant values are very strongly positively correlated and indicate in a similar manner how maintainability evolves between releases and from a more long-term perspective. Dubey, S.K. The two objects will be equal if they share the same memory address. A variety of data analysis methods (i.e., descriptive statistics, hypothesis testing, correlation analysis, multidimensional scaling, cluster analysis, and trend analysis) were used to answer the research questions, which allowed us to evaluate and compare the consistency of several variants of the Index in measuring the maintainability of object-oriented software systems on a large and diverse set of Java software in different contexts. ; Goldinger, S.D. = median, Std. Developed by JavaTpoint. Oregon Workshop on Software Metrics. We can solve this issue by splitting the test into two tests one test per assert. The only difference is in person1, the property age appears before name, meanwhile, in person2, name comes before age. equals() and hashCode() method. Create two variables, minimum and maximum. After that, we have invoked the hashCode() method using objects. Using JSON.stringify. In summary, the key contributions of this paper are: (1) a review of Maintainability Index variants utilized for maintainability measurement in object-oriented software; (2) an empirical investigation on how Maintainability Index variants perform when utilized for the maintainability measurement of a single object-oriented system; (3) an empirical investigation on how Maintainability Index variants perform when utilized for the maintainability measurement of an object-oriented software system in the context of other systems, i.e., other versions of the same software system and completely different software systems. 8792. This is also the case with the aforementioned studies, as the choice of the variant used for the maintainability measurement of object-oriented software varies across them. Following function compare obj1 with obj2. Though, when focusing on fine-grained results posed by the Index, the variant selection had a larger impact. Published at DZone with permission of Dror Helper, DZone MVB. Save the above first code as BeanComparatorExample.java. By changing the return value inside the compare method, you can sort in any order that you wish to, for example: For descending order just change the positions of a and b in the above compare method. Please note that many of the page functionalities won't work as expected without javascript enabled. Use Collections.min () method and store the return value in min variable. Here is the string comparison which is possible in Java. Else print minimum and maximum variables. If the Class only has a few properties, you can write the code by comparing each property. New JavaScript and Web Development content every day. Avg. 2021. 367377. In Proceedings of the 2018 International Conference on Innovations in Information Technology (IIT), Al Ain, United Arab Emirates, 1819 November 2018; pp. This solution requires rewriting the whole sorting code for different criteria like Roll No. The correctness and completeness of this process were manually verified on a sample of subjects. Empirical comparison of two metrics suites for maintainability prediction in packages of object-oriented systems: A case study of open source software. Elmidaoui, S.; Cheikhi, L.; Idri, A.; Abran, A. Empirical studies on software product maintainability prediction: A systematic mapping and review. Ive also created the new fake usingWrappingso that the original methods on the class would still be called I really care aboutToStringwhich I would override to produce a meaningful assertion message. The differences in Index variants values are the most notable when looking at the finer-grained results derived from different Index variants. ; writingoriginal draft preparation, T.H. We will be creating two objects and set the first object to "BMW" and the other object to "AUDI". ; Springer: Singapore, 2017; pp. Riaz, M.; Mendes, E.; Tempero, E. A systematic review of software maintainability prediction and metrics. those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). How to compare two objects in Java - StackHowTo https://doi.org/10.3390/app13052972, Subscribe to receive issue release notifications and newsletters from MDPI journals, You can make submissions to other journals. ; data curation, T.H. As you can see, the result book1 === book2 is false despite the equality of their content because they have different references. Available online: Virtual Machinery. Next, is create two objects with different values and compare them. In short, for any non-null reference say x and y, it returns true if and only if both references refer to the same object. JSON Compare - javatpoint To meet the above-specified objectives, the following two research questions (RQs) were formulated: How do different Maintainability Index variants perform when utilized for the maintainability measurement of a single object-oriented software system? Agree [. The simple difference formula: An approach to teaching nonparametric correlation. To compare these strings in Java, we need to use the equals() method of the string. A complete overview of related studies is presented in, Some studies have compared the Index with alternative software quality measures with the aim of assessing existing measures. Due to this behavior there are many (myself included) who suggest overridingEqualsto make sure that the actual values are compared, which could be a problem if our production code cannot be changed to accommodate our tests. Additionally, by having a better understanding of the characteristics that contribute to maintainability and how they can be measured by different Index variants, practitioners can also make informed decisions about how to prioritize and focus their efforts to improve these aspects of their software during development, leading to improvements in software quality and the long-term sustainability of their software systems. Object-Oriented Software. Ltd. All rights reserved. There are several Index variants that differ in the factors affecting maintainability (e.g., code complexity, software size, documentation) and their given importance. In java, being object-oriented, it is always dynamically created and automatically destroyed by the garbage collector as the scope of the object is over. Virtual Machinery. The method parses a reference object as a parameter. 8487. Comparison of Maintainability Index Measurement from Microsoft CodeLens and Line of Code. Software maintenance is a phase in the software life cycle that refers to modifications of a software system after delivery, aiming to provide support to the system [, Maintainability is an external quality attribute. In Proceedings of the 2019 International Conference on Machine Learning, Big Data, Cloud and Parallel Computing (COMITCon), Faridabad, India, 1416 February 2019; pp. ; investigation, T.H. Available online: Lacchia, M. Radon. Maua, G.; Galinac Grbac, T. Co-evolutionary multi-population genetic programming for classification in software defect prediction: An empirical case study. Use Collections.max () method and store the return value in max variable. Java provides the two methods of the Object class to compare the objects are as follows: Java equals () Method Java hashCode () Method Java equals () Method The equals () method of the Object class compare the equality of two objects. Arisholm, E.; Briand, L.C. By using our site, you No special Furthermore, the results of the study may not generalize to the broader population of object-oriented systems based on programming languages other than Java. On the other hand, equals() method compares whether the value of the strings is equal, and not the object itself. The original three-metric Maintainability Index (further referred to as. If the two objects have the same values, equals () will return true. The selection was random, and our selected subjects represent a heterogeneous group of software systems in terms of software characteristics, including size, complexity, code documentation, maturity, and domain of use. In Proceedings of the 15th International Conference on Advanced Computing and Communications (ADCOM 2007), Guwahati, India, 1821 December 2007; pp. We simply use the equal to operator (==) to compare the two strings, which compares the value Bold to Bold and prints Equal. 525532. Ganpati, A.; Kalia, A.; Singh, H. A comparative study of maintainability index of open source software. Elish, M.O. And also how equals() and hashcode() method are used widely in the Collection API. In Proceedings of the 2018 International Conference on Electrical Engineering and Informatics (ICELTICs), Banda Aceh, Indonesia, 1920 September 2018; pp. 2.2. Blogger | Programmer | Entrepreneur | Join me for more helpful insights: https://linktr.ee/amyjandrews92, console.log(JSON.stringify(person1) === JSON.stringify(person2)); // true, console.log(JSON.stringify(person1) === JSON.stringify(person2)); // false, console.log(_.isEqual(person1, person2)); // true, for (let i = 0; i < props1.length; i++) {, console.log(isEqual(person1, person2)); // true, console.log(isEqual(person1, person2)); // false, if ((!bothAreObjects && (obj1[prop] !== obj2[prop])). Parewa Labs Pvt. Editors select a small number of articles recently published in the journal that they believe will be particularly 261282. To ensure all included software systems were following object-oriented principles, some manual inspection of the source code of subject software systems was performed by the authors. Objects class from the Java.util . ; Pant, B.; Tiwari, U.K. Wilson, A.; Wedyan, F.; Omari, S. An Empirical Evaluation and Comparison of the Impact of MVVM and MVC GUI Driven Application Architectures on Maintainability and Testability. Malhotra, R.; Khanna, M. Particle swarm optimization-based ensemble learning for software change prediction. Seref, B.; Tanriover, O. 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