{"id":198,"date":"2023-11-26T21:11:56","date_gmt":"2023-11-27T00:11:56","guid":{"rendered":"https:\/\/urutaudev.com.br\/?p=198"},"modified":"2024-01-21T23:28:13","modified_gmt":"2024-01-22T02:28:13","slug":"como-verificar-numeros-em-string-no-java","status":"publish","type":"post","link":"https:\/\/urutaudev.com.br\/index.php\/2023\/11\/26\/como-verificar-numeros-em-string-no-java\/","title":{"rendered":"Como verificar n\u00fameros em String no Java"},"content":{"rendered":"<h2><span style=\"font-family: 'arial black', sans-serif;\">Neste tutorial mostro como verificar se uma string possui n\u00fameros no <a href=\"https:\/\/urutaudev.com.br\/index.php\/category\/tutorias\/java\/\">Java<\/a>.<\/span><\/h2>\n<hr \/>\n<h4><\/h4>\n<h4>Introdu\u00e7\u00e3o<\/h4>\n<p><span style=\"font-size: 14pt;\">Este tutorial visa mostrar como verificar se uma (String) possui n\u00fameros no Java, neste tutorial ser\u00e1 usado 2 formas r\u00e1pidas de como realizar est\u00e1 verifica\u00e7\u00e3o.<\/span><\/p>\n<p><span style=\"font-size: 14pt;\">Existem v\u00e1rias formas de verificar se uma (String) no java cont\u00e9m n\u00fameros dentro dela, m\u00e1s neste tutorial irei usar abordar a 2 formas mais r\u00e1pidas usando o m\u00e9todo (matches) da classe String e o m\u00e9todo (isDigit) da classe\u00a0Character do Java com auxilio do Stream Api.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h4><span style=\"font-size: 14pt;\">2 Formas r\u00e1pidas de verificar se uma string possui n\u00fameros.<\/span><\/h4>\n<p>&nbsp;<\/p>\n<h3>A 1\u00ba Forma \u00e9 usando o M\u00e9todo (matches)<\/h3>\n<p><span style=\"font-size: 14pt;\">Neste primeiro exemplo vou utilizar o\u00a0 m\u00e9todo (matches) que est\u00e1 presente na classe String do Java, al\u00e9m do m\u00e9todo (matches) irei usar a express\u00e3o (regex) para auxiliar na verifica\u00e7\u00e3o.<\/span><\/p>\n<p><span style=\"font-size: 14pt;\">A express\u00e3o regex que irei utilizar para comparar \u00e9 a\u00a0 (<strong>&#8220;.*\\\\d.&#8221;<\/strong>), nesta express\u00e3o verifico se uma String possui algum digito numeral.\u00a0<\/span><\/p>\n<h3><\/h3>\n<p><span style=\"font-size: 14pt;\">Para implementa\u00e7\u00e3o do c\u00f3digo ser\u00e1 utilizado 2 exemplos: <\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt;\">O primeiro exemplo irei passar uma String sem n\u00fameros e o retorno esperado ser\u00e1 um boolean com valor (false);<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">No segundo\u00a0 exemplo irei passar uma String com n\u00fameros e o retorno esperado ser\u00e1 um boolean com valor (true);<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 14pt;\">Segue abaixo como ficou o c\u00f3digo implementado:<\/span><\/p>\n<p>&nbsp;<\/p>\n<pre>public class NumberInString {\r\n\r\npublic static void main(String[] args) {\r\n\r\n\u00a0 boolean semNumero;\r\n\u00a0 boolean comNumero;\r\n\r\n\/\/ Usando String Metodo(matches)\r\n\u00a0 semNumero = \"ABCDEF\".matches(\".*\\\\d.\");\r\n\u00a0 System.out.println(semNumero);\r\n\r\n\u00a0 comNumero = \"ABC123\".matches(\".*\\\\d.\");\r\n  System.out.println(comNumero);\r\n\r\n}\r\n\r\n}<\/pre>\n<h4><\/h4>\n<h4>A 2\u00ba Forma \u00e9 usando o Stream Api\u00a0 e o M\u00e9todo (isDigit)<\/h4>\n<p>Neste segundo exemplo ser\u00e1 utilizado o Stream Api\u00a0 e o o M\u00e9todo (isDigit) da Classe<strong> (Character)<\/strong> do Java.<\/p>\n<p>O Stream Api ser\u00e1 utilizado para percorrer cada caractere da String informada e a cada caractere ser\u00e1 utilizado o m\u00e9todo (isDigit) juntamente\u00a0 com o m\u00e9todo (anyMatch) que ficaram respons\u00e1veis por comparar os valores de cada itera\u00e7\u00e3o, caso um dos caracteres seja um n\u00famero, eles retornara um valor boolean(true) informando que encontrou um digito numeral e caso n\u00e3o encontre retornara um valor boolean(false), informando que n\u00e3o existe n\u00famero na String.<\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 14pt;\">Segue abaixo como ficou o c\u00f3digo implementado:<\/span><\/p>\n<p>&nbsp;<\/p>\n<div>\n<pre>public class NumberInString {\r\n\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\r\n\u00a0 \u00a0 \u00a0 \u00a0 boolean semNumero;\r\n\r\n  \u00a0 \u00a0 \u00a0 boolean comNumero;\r\n  \u00a0 \u00a0  \r\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ Usando Stream API\r\n\r\n  \u00a0 \u00a0 \u00a0 semNumero = \"ABCDEF\".chars().anyMatch(Character::isDigit);\r\n\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(semNumero);\r\n\r\n  \u00a0 \u00a0 \u00a0 comNumero = \"ABC123\".chars().anyMatch(Character::isDigit);\r\n\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(comNumero);\r\n\r\n\u00a0 \u00a0 }\r\n\r\n}<\/pre>\n<\/div>\n<h4 style=\"text-align: center;\"><\/h4>\n<h4>Segue abaixo um pequeno v\u00eddeo explicativo da implementa\u00e7\u00e3o do c\u00f3digo acima:<\/h4>\n<p>&nbsp;<\/p>\n<p><iframe loading=\"lazy\" title=\"Formas de verificar n\u00fameros em string | Dicas r\u00e1pidas de #java\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/L9O-7odywlk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h4>Caso necessite do c\u00f3digo fonte deste tutorial segue o link do github:<\/h4>\n<p><a href=\"https:\/\/github.com\/JrDevCJ\/java-tutorial\/blob\/main\/Utils\/NumberInString.java\" target=\"_blank\" rel=\"noopener\">C\u00f3digo Fonte<\/a><\/p>\n<h3><\/h3>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Neste tutorial mostro como verificar se uma string possui n\u00fameros no Java. Introdu\u00e7\u00e3o Este tutorial visa mostrar como verificar se<\/p>\n","protected":false},"author":1,"featured_media":166,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[13],"tags":[22,40,21,39,18,41],"class_list":["post-198","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java","tag-number","tag-spring","tag-string","tag-tutorias","tag-verificar-numeros-em-string"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Como verificar n\u00fameros em String no Java - UrutauDev<\/title>\n<meta name=\"description\" content=\"2 Formas r\u00e1pidas de verificar se uma String possui n\u00fameros sem precisar de libs, usando apenas os pacotes nativos do java.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/urutaudev.com.br\/index.php\/2023\/11\/26\/como-verificar-numeros-em-string-no-java\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como verificar n\u00fameros em String no Java - UrutauDev\" \/>\n<meta property=\"og:description\" content=\"2 Formas r\u00e1pidas de verificar se uma String possui n\u00fameros sem precisar de libs, usando apenas os pacotes nativos do java.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/urutaudev.com.br\/index.php\/2023\/11\/26\/como-verificar-numeros-em-string-no-java\/\" \/>\n<meta property=\"og:site_name\" content=\"UrutauDev\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-27T00:11:56+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-22T02:28:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/urutaudev.com.br\/wp-content\/uploads\/2023\/09\/logo-java.png\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"C. 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