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How do annotations affect Java code readability?

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Autor(es):
Guerra, Eduardo ; Gomes, Everaldo ; Ferreira, Jeferson ; Wiese, Igor ; Lima, Phyllipe ; Gerosa, Marco ; Meirelles, Paulo
Número total de Autores: 7
Tipo de documento: Artigo Científico
Fonte: EMPIRICAL SOFTWARE ENGINEERING; v. 29, n. 3, p. 31-pg., 2024-05-01.
Resumo

ContextCode annotations have gained widespread popularity in programming languages, offering developers the ability to attach metadata to code elements to define custom behaviors. Many modern frameworks and APIs use annotations to keep integration less verbose and located nearer to the corresponding code element. Despite these advantages, practitioners' anecdotal evidence suggests that annotations might negatively affect code readability.ObjectiveTo better understand this effect, this paper systematically investigates the relationship between code annotations and code readability.MethodIn a survey with software developers (n=332), we present 15 pairs of Java code snippets with and without code annotations. These pairs were designed considering five categories of annotation used in real-world Java frameworks and APIs. Survey participants selected the code snippet they considered more readable for each pair and answered an open question about how annotations affect the code's readability.ResultsPreferences were scattered for all categories of annotation usage, revealing no consensus among participants. The answers were spread even when segregated by participants' programming or annotation-related experience. Nevertheless, some participants showed a consistent preference in favor or against annotations across all categories, which may indicate a personal preference. Our qualitative analysis of the open-ended questions revealed that participants often praise annotation impacts on design, maintainability, and productivity but expressed contrasting views on understandability and code clarity.ConclusionsSoftware developers and API designers can consider our results when deciding whether to use annotations, equipped with the insight that developers express contrasting views of the annotations' impact on code readability. (AU)

Processo FAPESP: 21/06662-1 - Transformando Padawans em Jedis: usando exemplos trabalhados para melhorar as habilidades dos novatos em projetos de software livre
Beneficiário:Igor Scaliante Wiese
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 19/12743-4 - Um estudo sobre o impacto de anotações de código na evolução de software
Beneficiário:Paulo Roberto Miranda Meirelles
Modalidade de apoio: Auxílio à Pesquisa - Regular