{"id":6597,"date":"2026-04-13T11:50:42","date_gmt":"2026-04-13T11:50:42","guid":{"rendered":"http:\/\/the-codest.localhost\/dictionary\/immutable-object\/"},"modified":"2026-04-13T11:50:50","modified_gmt":"2026-04-13T11:50:50","slug":"objeto-imutavel","status":"publish","type":"dictionary","link":"https:\/\/thecodest.co\/pt\/dictionary\/immutable-object\/","title":{"rendered":"Objeto imut\u00e1vel"},"content":{"rendered":"<h1>O que \u00e9 um Objeto Imut\u00e1vel?<\/h1>\n<p>Um objeto imut\u00e1vel \u00e9 um objeto que n\u00e3o pode ser modificado depois de ter sido criado. Por outras palavras, o seu estado n\u00e3o pode ser alterado depois de ter sido instanciado. Qualquer tentativa de alterar o seu valor resulta na cria\u00e7\u00e3o de um novo objeto com o valor atualizado, deixando o objeto original inalterado.<\/p>\n<p>Este conceito \u00e9 frequentemente utilizado em <a href=\"https:\/\/thecodest.co\/pt\/blog\/top-programming-languages-to-build-e-commerce\/\">linguagens de programa\u00e7\u00e3o<\/a> que suportam a programa\u00e7\u00e3o funcional, em que a imutabilidade \u00e9 uma carater\u00edstica fundamental. Os objectos imut\u00e1veis s\u00e3o \u00fateis em situa\u00e7\u00f5es em que o estado de um objeto n\u00e3o deve ser alterado, como em ambientes multithread em que o acesso simult\u00e2neo a objectos mut\u00e1veis pode levar a condi\u00e7\u00f5es de corrida e <a href=\"https:\/\/thecodest.co\/pt\/blog\/app-data-collection-security-risks-value-and-types-explored\/\">dados<\/a> corrup\u00e7\u00e3o.<\/p>\n<p>Os objectos imut\u00e1veis t\u00eam v\u00e1rias vantagens sobre os objectos mut\u00e1veis. Em primeiro lugar, s\u00e3o thread-safe e podem ser partilhados em seguran\u00e7a entre threads sem necessidade de sincroniza\u00e7\u00e3o. Em segundo lugar, eles s\u00e3o mais f\u00e1ceis de raciocinar, pois seu estado n\u00e3o pode mudar inesperadamente. Em terceiro lugar, eles podem ser usados como chaves em <a href=\"https:\/\/thecodest.co\/pt\/blog\/hash-to-use-or-not-to-use\/\">haxixe<\/a> tabelas e conjuntos, uma vez que o seu valor de hash \u00e9 fixo e n\u00e3o se altera com o tempo.<\/p>\n<p>Exemplos de objectos imut\u00e1veis em <a href=\"https:\/\/thecodest.co\/pt\/blog\/find-the-right-java-developer-now\/\">Java<\/a> incluem String, Integer e LocalDate. Depois de um objeto String ter sido criado, o seu valor n\u00e3o pode ser alterado. Qualquer tentativa de o modificar resulta na cria\u00e7\u00e3o de um novo objeto String com o valor atualizado. Da mesma forma, depois de um objeto Integer ter sido criado, o seu valor n\u00e3o pode ser alterado.<\/p>\n<p>No entanto, os objectos imut\u00e1veis n\u00e3o s\u00e3o adequados para todas as situa\u00e7\u00f5es. Em alguns casos, os objectos mut\u00e1veis s\u00e3o mais adequados, por exemplo, quando o estado de um objeto precisa de ser atualizado frequentemente. Nesses casos, \u00e9 importante garantir que o acesso a objetos mut\u00e1veis seja sincronizado para evitar condi\u00e7\u00f5es de corrida e corrup\u00e7\u00e3o de dados.<\/p>\n<p>Em resumo, um objeto imut\u00e1vel \u00e9 um objeto que n\u00e3o pode ser modificado depois de ter sido criado. \u00c9 \u00fatil em situa\u00e7\u00f5es em que o estado de um objeto n\u00e3o deve ser alterado, como em ambientes multi-threaded. Os objectos imut\u00e1veis t\u00eam v\u00e1rias vantagens sobre os objectos mut\u00e1veis, incluindo a seguran\u00e7a das threads, a facilidade de racioc\u00ednio e a adequa\u00e7\u00e3o para utiliza\u00e7\u00e3o como chaves em tabelas de hash e conjuntos.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aprender sobre objectos imut\u00e1veis em programa\u00e7\u00e3o: objectos que n\u00e3o podem ser modificados depois de criados. As vantagens incluem a seguran\u00e7a das linhas de produ\u00e7\u00e3o e a facilidade de racioc\u00ednio.<\/p>","protected":false},"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-6597","dictionary","type-dictionary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Immutable Object - The Codest<\/title>\n<meta name=\"description\" content=\"Learn about immutable objects in programming: objects that cannot be modified once created. 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