August 2026
Intermediate
538 pages
15h 38m
Portuguese (Portugal, Brazil)
book
Java em poucas palavras (Portuguese Edition), 9th Edition
by Benjamin J. Evans, Jason R. Clark, David Flanagan
Content preview from Java em poucas palavras (Portuguese Edition), 9th Edition
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Capítulo 14. Módulos da PlataformaJava
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Neste capítulo, vamos apresentar uma introdução básica ao Sistema de Módulos da Plataforma Java (JPMS). No entanto, esse é um assunto vasto e complexo — os leitores interessados podem precisar de uma referência mais aprofundada, como Java 9 Modularity , de Sander Mak e Paul Bakker (O’Reilly).
Os módulos, um recurso relativamente avançado, tratam principalmente do empacotamento e da implantação de aplicativos inteiros e suas dependências. Eles foram adicionados à plataforma cerca de 20 anos após a primeira versão do Java e, por isso, podem ser vistos como, em grande parte, ortogonais ao restante da sintaxe da linguagem.
A forte ênfase do Java na compatibilidade com versões anteriores também tem um papel importante aqui, já que aplicativos não modulares precisam continuar funcionando. Isso levou os arquitetos e responsáveis pela plataforma Java a adotarem uma visão pragmática sobre a necessidade de as equipes adotarem módulos para o código existente. Talvez isso seja melhor expresso por esta citação do arquiteto da plataforma Java da Oracle:
Não há necessidade de mudar para módulos.
Nunca houve necessidade de mudar para os módulos.
O Java 9 e versões posteriores oferecem suporte a arquivos JAR tradicionais no classpath tradicional, por meio do conceito de módulo sem nome, e provavelmente continuarão a fazê-lo até a morte ...
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