{"id":790,"date":"2024-07-11T09:05:37","date_gmt":"2024-07-11T12:05:37","guid":{"rendered":"http:\/\/www.isacaguiar.com.br\/blog\/?p=790"},"modified":"2024-07-10T19:08:28","modified_gmt":"2024-07-10T22:08:28","slug":"evolucoes-do-java-12","status":"publish","type":"post","link":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/","title":{"rendered":"Evolu\u00e7\u00f5es do Java 12"},"content":{"rendered":"<p>Java 12, lan\u00e7ado em mar\u00e7o de 2019, trouxe v\u00e1rias melhorias e evolu\u00e7\u00f5es que refletem o compromisso cont\u00ednuo da comunidade Java em fornecer uma plataforma robusta e moderna para desenvolvedores. Esta vers\u00e3o inclui novas funcionalidades e aprimoramentos significativos que facilitam o desenvolvimento de software. A seguir, destacamos as principais evolu\u00e7\u00f5es do Java 12.<\/p>\n<h4>1. <strong>Switch Expressions (JEP 325)<\/strong><\/h4>\n<p>A introdu\u00e7\u00e3o das express\u00f5es <code>switch<\/code> como uma feature preview \u00e9 uma das mudan\u00e7as mais not\u00e1veis no Java 12. Esta melhoria simplifica a sintaxe dos <code>switch<\/code> tradicionais, tornando o c\u00f3digo mais conciso e menos suscet\u00edvel a erros:<\/p>\n<pre class=\"wp-block-preformatted prism line-numbers lang-java\" data-lang=\"JAVA\"><code class=\"language-java\">var day = \"MONDAY\";\r\nvar numLetters = switch (day) {\r\n    case \"MONDAY\", \"FRIDAY\", \"SUNDAY\" -> 6;\r\n    case \"TUESDAY\" -> 7;\r\n    case \"THURSDAY\", \"SATURDAY\" -> 8;\r\n    case \"WEDNESDAY\" -> 9;\r\n    default -> throw new IllegalStateException(\"Unexpected value: \" + day);\r\n};\r\n<\/code><\/pre>\n<h4>2. <strong>Shenandoah: Low-Pause-Time Garbage Collector (JEP 189)<\/strong><\/h4>\n<p>O Shenandoah \u00e9 um garbage collector experimental que se concentra em reduzir o tempo de pausa do GC, tornando-o ideal para aplica\u00e7\u00f5es que requerem baixa lat\u00eancia. Ele oferece uma alternativa ao ZGC (Garbage Collector de Baixa Lat\u00eancia) introduzido no Java 11.<\/p>\n<h4>3. <strong>Microbenchmark Suite (JEP 230)<\/strong><\/h4>\n<p>A inclus\u00e3o de uma su\u00edte de microbenchmark no JDK \u00e9 uma ferramenta valiosa para os desenvolvedores. Baseada no projeto OpenJDK JMH (Java Microbenchmark Harness), esta su\u00edte facilita a cria\u00e7\u00e3o e execu\u00e7\u00e3o de benchmarks para medir o desempenho de diferentes partes do c\u00f3digo, ajudando na otimiza\u00e7\u00e3o e na identifica\u00e7\u00e3o de gargalos.<\/p>\n<h4>4. <strong>APIs para Compact Number Formatting (JEP 334)<\/strong><\/h4>\n<p>Java 12 introduz novas APIs para formata\u00e7\u00e3o de n\u00fameros compactos, facilitando a exibi\u00e7\u00e3o de n\u00fameros grandes de forma mais leg\u00edvel e concisa. Isso \u00e9 especialmente \u00fatil em aplica\u00e7\u00f5es que lidam com grandes volumes de dados num\u00e9ricos:<\/p>\n<pre class=\"wp-block-preformatted prism line-numbers lang-java\" data-lang=\"JAVA\"><code class=\"language-java\">NumberFormat fmt = NumberFormat.getCompactNumberInstance(Locale.US, NumberFormat.Style.SHORT);\r\nSystem.out.println(fmt.format(1_000)); \/\/ prints \"1K\"\r\nSystem.out.println(fmt.format(1_000_000)); \/\/ prints \"1M\"\r\n<\/code><\/pre>\n<h4>5. <strong>One AArch64 Port, Not Two (JEP 340)<\/strong><\/h4>\n<p>Esta melhoria remove uma das portas AArch64 do JDK, consolidando o suporte a essa arquitetura e simplificando a manuten\u00e7\u00e3o do JDK.<\/p>\n<h4>6. <strong>Default CDS Archives (JEP 341)<\/strong><\/h4>\n<p>Java 12 ativa, por padr\u00e3o, o Class Data Sharing (CDS), que permite a cria\u00e7\u00e3o de arquivos de dados de classe compartilhados. Isso melhora o tempo de inicializa\u00e7\u00e3o das aplica\u00e7\u00f5es, proporcionando um desempenho melhor e mais consistente.<\/p>\n<h4>7. <strong>Prompt e Diagn\u00f3stico da VM<\/strong><\/h4>\n<ul>\n<li><strong>JEP 344: Abortable Mixed Collections for G1<\/strong> Introduz a capacidade de cancelar cole\u00e7\u00f5es mistas no G1 Garbage Collector se ultrapassarem uma determinada dura\u00e7\u00e3o, melhorando a previsibilidade do tempo de pausa.<\/li>\n<li><strong>JEP 346: Prompt e Diagn\u00f3stico da VM<\/strong> Fornece uma forma de obter e exibir informa\u00e7\u00f5es de diagn\u00f3stico da JVM, facilitando a depura\u00e7\u00e3o e a manuten\u00e7\u00e3o.<\/li>\n<\/ul>\n<h4>8. <strong>Raw String Literals (Removido)<\/strong><\/h4>\n<p>Embora tenha sido considerado durante o desenvolvimento do Java 12, o suporte a literais de string brutos (raw string literals) foi removido, adiando essa funcionalidade para vers\u00f5es futuras.<\/p>\n<h3>Conclus\u00e3o<\/h3>\n<p>Java 12 continua a tend\u00eancia de evolu\u00e7\u00e3o incremental da linguagem, introduzindo funcionalidades que simplificam o desenvolvimento e melhoram o desempenho das aplica\u00e7\u00f5es. Com as express\u00f5es <code>switch<\/code>, novos garbage collectors, APIs aprimoradas para formata\u00e7\u00e3o de n\u00fameros e melhorias na detec\u00e7\u00e3o e diagn\u00f3stico da JVM, Java 12 oferece ferramentas poderosas e eficientes para os desenvolvedores.<\/p>\n<p>A ado\u00e7\u00e3o dessas evolu\u00e7\u00f5es permite um desenvolvimento mais \u00e1gil e produtivo, focado mais na l\u00f3gica de neg\u00f3cios e menos nos detalhes de baixo n\u00edvel da linguagem. Java continua a se adaptar \u00e0s necessidades do desenvolvimento moderno, mantendo sua relev\u00e2ncia e robustez no mercado de software.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java 12, lan\u00e7ado em mar\u00e7o de 2019, trouxe v\u00e1rias melhorias e evolu\u00e7\u00f5es que refletem o compromisso cont\u00ednuo da comunidade Java em fornecer\u2026<\/p>\n","protected":false},"author":1,"featured_media":794,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,13],"tags":[],"class_list":["post-790","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-desenvolvimento-de-software","category-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Evolu\u00e7\u00f5es do Java 12 - Blog do Aguiar<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Evolu\u00e7\u00f5es do Java 12 - Blog do Aguiar\" \/>\n<meta property=\"og:description\" content=\"Java 12, lan\u00e7ado em mar\u00e7o de 2019, trouxe v\u00e1rias melhorias e evolu\u00e7\u00f5es que refletem o compromisso cont\u00ednuo da comunidade Java em fornecer\u2026\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog do Aguiar\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/isac.velozo.aguiar\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-11T12:05:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"isacaguiar\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"isacaguiar\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/\"},\"author\":{\"name\":\"isacaguiar\",\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/#\/schema\/person\/78719359439f068d8b1e5e0bcb9d934d\"},\"headline\":\"Evolu\u00e7\u00f5es do Java 12\",\"datePublished\":\"2024-07-11T12:05:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/\"},\"wordCount\":535,\"image\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp\",\"articleSection\":[\"Desenvolvimento de Software\",\"Java\"],\"inLanguage\":\"pt-BR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/\",\"url\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/\",\"name\":\"Evolu\u00e7\u00f5es do Java 12 - Blog do Aguiar\",\"isPartOf\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp\",\"datePublished\":\"2024-07-11T12:05:37+00:00\",\"author\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/#\/schema\/person\/78719359439f068d8b1e5e0bcb9d934d\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#breadcrumb\"},\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage\",\"url\":\"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp\",\"contentUrl\":\"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp\",\"width\":1024,\"height\":1024},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"In\u00edcio\",\"item\":\"https:\/\/www.isacaguiar.com.br\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Evolu\u00e7\u00f5es do Java 12\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/#website\",\"url\":\"https:\/\/www.isacaguiar.com.br\/blog\/\",\"name\":\"Blog do Aguiar\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.isacaguiar.com.br\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"pt-BR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.isacaguiar.com.br\/blog\/#\/schema\/person\/78719359439f068d8b1e5e0bcb9d934d\",\"name\":\"isacaguiar\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/e22bb054d1154f07e6c91b82f0d68a219b6b04b58e5e3692c30cf457b51a9e9f?s=96&d=mm&r=g\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/e22bb054d1154f07e6c91b82f0d68a219b6b04b58e5e3692c30cf457b51a9e9f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/e22bb054d1154f07e6c91b82f0d68a219b6b04b58e5e3692c30cf457b51a9e9f?s=96&d=mm&r=g\",\"caption\":\"isacaguiar\"},\"url\":\"https:\/\/www.isacaguiar.com.br\/blog\/author\/isacaguiar\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Evolu\u00e7\u00f5es do Java 12 - Blog do Aguiar","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/","og_locale":"pt_BR","og_type":"article","og_title":"Evolu\u00e7\u00f5es do Java 12 - Blog do Aguiar","og_description":"Java 12, lan\u00e7ado em mar\u00e7o de 2019, trouxe v\u00e1rias melhorias e evolu\u00e7\u00f5es que refletem o compromisso cont\u00ednuo da comunidade Java em fornecer\u2026","og_url":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/","og_site_name":"Blog do Aguiar","article_publisher":"https:\/\/www.facebook.com\/isac.velozo.aguiar","article_published_time":"2024-07-11T12:05:37+00:00","og_image":[{"width":1024,"height":1024,"url":"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp","type":"image\/webp"}],"author":"isacaguiar","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"isacaguiar","Est. tempo de leitura":"3 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#article","isPartOf":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/"},"author":{"name":"isacaguiar","@id":"https:\/\/www.isacaguiar.com.br\/blog\/#\/schema\/person\/78719359439f068d8b1e5e0bcb9d934d"},"headline":"Evolu\u00e7\u00f5es do Java 12","datePublished":"2024-07-11T12:05:37+00:00","mainEntityOfPage":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/"},"wordCount":535,"image":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage"},"thumbnailUrl":"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp","articleSection":["Desenvolvimento de Software","Java"],"inLanguage":"pt-BR"},{"@type":"WebPage","@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/","url":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/","name":"Evolu\u00e7\u00f5es do Java 12 - Blog do Aguiar","isPartOf":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage"},"image":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage"},"thumbnailUrl":"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp","datePublished":"2024-07-11T12:05:37+00:00","author":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/#\/schema\/person\/78719359439f068d8b1e5e0bcb9d934d"},"breadcrumb":{"@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#breadcrumb"},"inLanguage":"pt-BR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/"]}]},{"@type":"ImageObject","inLanguage":"pt-BR","@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#primaryimage","url":"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp","contentUrl":"https:\/\/www.isacaguiar.com.br\/blog\/wp-content\/uploads\/2024\/07\/java-12.webp","width":1024,"height":1024},{"@type":"BreadcrumbList","@id":"https:\/\/www.isacaguiar.com.br\/blog\/evolucoes-do-java-12\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"In\u00edcio","item":"https:\/\/www.isacaguiar.com.br\/blog\/"},{"@type":"ListItem","position":2,"name":"Evolu\u00e7\u00f5es do Java 12"}]},{"@type":"WebSite","@id":"https:\/\/www.isacaguiar.com.br\/blog\/#website","url":"https:\/\/www.isacaguiar.com.br\/blog\/","name":"Blog do Aguiar","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.isacaguiar.com.br\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"pt-BR"},{"@type":"Person","@id":"https:\/\/www.isacaguiar.com.br\/blog\/#\/schema\/person\/78719359439f068d8b1e5e0bcb9d934d","name":"isacaguiar","image":{"@type":"ImageObject","inLanguage":"pt-BR","@id":"https:\/\/secure.gravatar.com\/avatar\/e22bb054d1154f07e6c91b82f0d68a219b6b04b58e5e3692c30cf457b51a9e9f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/e22bb054d1154f07e6c91b82f0d68a219b6b04b58e5e3692c30cf457b51a9e9f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/e22bb054d1154f07e6c91b82f0d68a219b6b04b58e5e3692c30cf457b51a9e9f?s=96&d=mm&r=g","caption":"isacaguiar"},"url":"https:\/\/www.isacaguiar.com.br\/blog\/author\/isacaguiar\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/posts\/790","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/comments?post=790"}],"version-history":[{"count":4,"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/posts\/790\/revisions"}],"predecessor-version":[{"id":795,"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/posts\/790\/revisions\/795"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/media\/794"}],"wp:attachment":[{"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/media?parent=790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/categories?post=790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.isacaguiar.com.br\/blog\/wp-json\/wp\/v2\/tags?post=790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}