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
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Capítulo 13. Carregamento de classes , reflexão e identificadores de método
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
No Capítulo 4, conhecemos os objetos Class do Java, uma forma de representar um tipo ativo em um processo Java em execução. Neste capítulo, vamos partir dessa base para discutir como o ambiente Java carrega e disponibiliza novos tipos em tempo de execução.
Na segunda metade do capítulo, vamos apresentar os recursos de introspecção do Java, tanto a API de Reflexão original quanto os recursos mais recentes de identificadores de método.
Esses recursos são importantes porque proporcionam as funcionalidades dinâmicas da plataforma Java. Lembra que, no Capítulo 1, falamos que, embora o código-fonte do Java se pareça com o do C/C++ e pareça ser uma linguagem compilada, na hora da execução a história é bem diferente?
Este capítulo vai te dar uma introdução sobre como isso é feito — e por que o Java consegue ser tão flexível e dinâmico quanto o Python, o JavaScript ou o Ruby. Vamos começar dando uma olhada mais de perto nos arquivos de classe e nos objetos Class.
Arquivos de classe, objetos de classe e metadados
Os arquivos de classe , como vimos no Capítulo 1, são o resultado da compilação de arquivos-fonte Java (ou, potencialmente, de outras linguagens) na forma intermediária usada pela JVM. São arquivos binários que não foram feitos para serem lidos por pessoas. Na hora da execução, esses ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.