{"id":6550,"date":"2023-07-21T08:16:44","date_gmt":"2023-07-21T11:16:44","guid":{"rendered":"https:\/\/elemarjr.com\/clube-de-estudos\/?p=6550"},"modified":"2023-10-21T21:33:59","modified_gmt":"2023-10-22T00:33:59","slug":"tabelas-hash-desvendando-a-eficiencia-na-busca-e-acesso-a-dados","status":"publish","type":"artigos","link":"https:\/\/elemarjr.com\/clube-de-estudos\/artigos\/tabelas-hash-desvendando-a-eficiencia-na-busca-e-acesso-a-dados\/","title":{"rendered":"Tabelas Hash: Desvendando a Efici\u00eancia na Busca e Acesso a Dados"},"content":{"rendered":"\n<p>As tabelas hash, tamb\u00e9m conhecidas como tabelas de dispers\u00e3o, s\u00e3o uma estrutura de dados fundamental na ci\u00eancia da computa\u00e7\u00e3o. Elas oferecem uma abordagem eficiente para armazenar e recuperar informa\u00e7\u00f5es com base em chaves \u00fanicas. Neste artigo, exploraremos os conceitos essenciais das tabelas hash e destacaremos suas vantagens e desvantagens em rela\u00e7\u00e3o a outras estruturas de dados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fun\u00e7\u00f5es de Hashing<\/h2>\n\n\n\n<p>Um elemento-chave para o funcionamento das tabelas hash \u00e9 a fun\u00e7\u00e3o de hash. Ela \u00e9 respons\u00e1vel por transformar a chave de pesquisa em um \u00edndice dentro da tabela, permitindo um acesso direto aos dados desejados. Nessa se\u00e7\u00e3o, explicaremos o papel das fun\u00e7\u00f5es de hash e discutiremos a import\u00e2ncia de uma boa distribui\u00e7\u00e3o dos valores hash para evitar colis\u00f5es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Resolvendo Conflitos de Colis\u00e3o<\/h2>\n\n\n\n<p>Colis\u00f5es ocorrem quando duas ou mais chaves resultam no mesmo \u00edndice de tabela. A maneira como essas colis\u00f5es s\u00e3o tratadas pode afetar significativamente o desempenho da tabela hash. Apresentaremos as principais t\u00e9cnicas para resolver essas colis\u00f5es, incluindo a lista encadeada, resolu\u00e7\u00e3o por sondagem linear e sondagem quadr\u00e1tica. Faremos uma an\u00e1lise comparativa dos pr\u00f3s e contras de cada abordagem.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Complexidade de Tempo e Espa\u00e7o<\/h2>\n\n\n\n<p>A complexidade de tempo das tabelas hash \u00e9 notoriamente conhecida como O(1), o que significa que o tempo de busca \u00e9 constante e independente do tamanho da tabela. Discutiremos como alcan\u00e7ar essa efici\u00eancia e tamb\u00e9m abordaremos a complexidade de espa\u00e7o, considerando o uso eficiente de mem\u00f3ria para armazenar os dados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Implementa\u00e7\u00e3o de Tabelas Hash<\/h2>\n\n\n\n<p>Para consolidar o entendimento pr\u00e1tico das tabelas hash, esta se\u00e7\u00e3o fornecer\u00e1 um passo a passo para implementar uma tabela hash em diferentes linguagens de programa\u00e7\u00e3o. Com exemplos de c\u00f3digo, ilustraremos o processo de cria\u00e7\u00e3o da estrutura e como realizar as opera\u00e7\u00f5es de inser\u00e7\u00e3o, busca e remo\u00e7\u00e3o de elementos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Exemplo de implementa\u00e7\u00e3o em Java<\/h3>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" style=\"font-size:.875rem;line-height:1.25rem\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#39404f;color:#c8d0e0\">Java<\/span><span role=\"button\" tabindex=\"0\" data-code=\"import java.util.ArrayList;\nimport java.util.List;\n\npublic class TabelaHash {\n\n    \/\/ Definimos uma classe interna para representar os pares de chave-valor\n    private static class Elemento {\n        String chave;\n        int valor;\n\n        Elemento(String chave, int valor) {\n            this.chave = chave;\n            this.valor = valor;\n        }\n    }\n\n    private static final int TAMANHO_TABELA = 10; \/\/ Definimos o tamanho da tabela hash\n    private List&lt;Elemento&gt;[] tabela; \/\/ Array de listas para armazenar os elementos\n\n    public TabelaHash() {\n        tabela = new List[TAMANHO_TABELA]; \/\/ Inicializamos o array de listas\n\n        \/\/ Precisamos criar uma lista vazia em cada posi\u00e7\u00e3o do array\n        for (int i = 0; i &lt; TAMANHO_TABELA; i++) {\n            tabela[i] = new ArrayList&lt;&gt;();\n        }\n    }\n\n    \/\/ M\u00e9todo para calcular o \u00edndice da chave na tabela hash\n    private int hash(String chave) {\n        \/\/ Neste exemplo simples, usaremos o somat\u00f3rio dos c\u00f3digos ASCII dos caracteres da chave\n        int soma = 0;\n        for (char c : chave.toCharArray()) {\n            soma += (int) c;\n        }\n        return soma % TAMANHO_TABELA; \/\/ Retornamos o \u00edndice calculado\n    }\n\n    \/\/ M\u00e9todo para inserir um elemento na tabela hash\n    public void inserir(String chave, int valor) {\n        int indice = hash(chave); \/\/ Calculamos o \u00edndice da chave\n\n        \/\/ Criamos um novo elemento com a chave e valor fornecidos\n        Elemento novoElemento = new Elemento(chave, valor);\n\n        \/\/ Adicionamos o novo elemento na lista do \u00edndice calculado\n        tabela[indice].add(novoElemento);\n    }\n\n    \/\/ M\u00e9todo para buscar o valor associado a uma chave na tabela hash\n    public int buscar(String chave) {\n        int indice = hash(chave); \/\/ Calculamos o \u00edndice da chave\n\n        \/\/ Procuramos a chave na lista do \u00edndice calculado\n        for (Elemento elemento : tabela[indice]) {\n            if (elemento.chave.equals(chave)) {\n                return elemento.valor; \/\/ Chave encontrada, retornamos o valor associado\n            }\n        }\n\n        \/\/ Caso a chave n\u00e3o seja encontrada, retornamos um valor padr\u00e3o, como -1\n        return -1;\n    }\n\n    \/\/ M\u00e9todo para remover um elemento da tabela hash\n    public void remover(String chave) {\n        int indice = hash(chave); \/\/ Calculamos o \u00edndice da chave\n\n        \/\/ Procuramos e removemos a chave na lista do \u00edndice calculado\n        for (Elemento elemento : tabela[indice]) {\n            if (elemento.chave.equals(chave)) {\n                tabela[indice].remove(elemento); \/\/ Chave encontrada, removemos o elemento\n                return; \/\/ Terminamos a opera\u00e7\u00e3o ap\u00f3s remover o elemento\n            }\n        }\n    }\n\n    public static void main(String[] args) {\n        \/\/ Criamos uma nova inst\u00e2ncia da tabela hash\n        TabelaHash tabela = new TabelaHash();\n\n        \/\/ Exemplo de inser\u00e7\u00e3o de elementos\n        tabela.inserir(&quot;chave1&quot;, 10);\n        tabela.inserir(&quot;chave2&quot;, 20);\n        tabela.inserir(&quot;chave3&quot;, 30);\n\n        \/\/ Exemplo de busca de elementos\n        int valorChave2 = tabela.buscar(&quot;chave2&quot;);\n        System.out.println(&quot;Valor associado \u00e0 chave2: &quot; + valorChave2); \/\/ Deve imprimir 20\n\n        \/\/ Exemplo de remo\u00e7\u00e3o de elementos\n        tabela.remover(&quot;chave1&quot;);\n        int valorChave1 = tabela.buscar(&quot;chave1&quot;);\n        System.out.println(&quot;Valor associado \u00e0 chave1 ap\u00f3s remo\u00e7\u00e3o: &quot; + valorChave1); \/\/ Deve imprimir -1\n    }\n}\n\n\/\/ Fonte: ChatGPT\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">java<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">util<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">ArrayList<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">java<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">util<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">public<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">TabelaHash<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">    <\/span><span style=\"color: #616E88\">\/\/ Definimos uma classe interna para representar os pares de chave-valor<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">static<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Elemento<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">valor<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #88C0D0\">Elemento<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">valor<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #81A1C1\">this<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> chave<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #81A1C1\">this<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">valor<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> valor<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">static<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">final<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">TAMANHO_TABELA<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">10<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Definimos o tamanho da tabela hash<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #8FBCBB\">Elemento<\/span><span style=\"color: #ECEFF4\">&gt;[]<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Array de listas para armazenar os elementos<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">public<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">TabelaHash<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        tabela <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">new<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #ECEFF4\">[<\/span><span style=\"color: #D8DEE9FF\">TAMANHO_TABELA<\/span><span style=\"color: #ECEFF4\">]<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Inicializamos o array de listas<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Precisamos criar uma lista vazia em cada posi\u00e7\u00e3o do array<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">for<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">i<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #D8DEE9FF\"> TAMANHO_TABELA<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i<\/span><span style=\"color: #81A1C1\">++<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            tabela<\/span><span style=\"color: #ECEFF4\">[<\/span><span style=\"color: #D8DEE9FF\">i<\/span><span style=\"color: #ECEFF4\">]<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">new<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">ArrayList<\/span><span style=\"color: #ECEFF4\">&lt;&gt;()<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">    <\/span><span style=\"color: #616E88\">\/\/ M\u00e9todo para calcular o \u00edndice da chave na tabela hash<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">hash<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Neste exemplo simples, usaremos o somat\u00f3rio dos c\u00f3digos ASCII dos caracteres da chave<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">soma<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">for<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">char<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">c<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">toCharArray<\/span><span style=\"color: #ECEFF4\">())<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            soma <\/span><span style=\"color: #81A1C1\">+=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> c<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> soma <\/span><span style=\"color: #81A1C1\">%<\/span><span style=\"color: #D8DEE9FF\"> TAMANHO_TABELA<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Retornamos o \u00edndice calculado<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">    <\/span><span style=\"color: #616E88\">\/\/ M\u00e9todo para inserir um elemento na tabela hash<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">public<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">void<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">inserir<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">valor<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">indice<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">hash<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">chave<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Calculamos o \u00edndice da chave<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Criamos um novo elemento com a chave e valor fornecidos<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #8FBCBB\">Elemento<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">novoElemento<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">new<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">Elemento<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">chave<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> valor<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Adicionamos o novo elemento na lista do \u00edndice calculado<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        tabela<\/span><span style=\"color: #ECEFF4\">[<\/span><span style=\"color: #D8DEE9FF\">indice<\/span><span style=\"color: #ECEFF4\">].<\/span><span style=\"color: #88C0D0\">add<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">novoElemento<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">    <\/span><span style=\"color: #616E88\">\/\/ M\u00e9todo para buscar o valor associado a uma chave na tabela hash<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">public<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">buscar<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">indice<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">hash<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">chave<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Calculamos o \u00edndice da chave<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Procuramos a chave na lista do \u00edndice calculado<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">for<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">Elemento<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">elemento<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> tabela<\/span><span style=\"color: #ECEFF4\">[<\/span><span style=\"color: #D8DEE9FF\">indice<\/span><span style=\"color: #ECEFF4\">])<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">elemento<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">equals<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">chave<\/span><span style=\"color: #ECEFF4\">))<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">elemento<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">valor<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Chave encontrada, retornamos o valor associado<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Caso a chave n\u00e3o seja encontrada, retornamos um valor padr\u00e3o, como -1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-<\/span><span style=\"color: #B48EAD\">1<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">    <\/span><span style=\"color: #616E88\">\/\/ M\u00e9todo para remover um elemento da tabela hash<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">public<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">void<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">remover<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">indice<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">hash<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">chave<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Calculamos o \u00edndice da chave<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Procuramos e removemos a chave na lista do \u00edndice calculado<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">for<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">Elemento<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">elemento<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> tabela<\/span><span style=\"color: #ECEFF4\">[<\/span><span style=\"color: #D8DEE9FF\">indice<\/span><span style=\"color: #ECEFF4\">])<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">elemento<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">chave<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">equals<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">chave<\/span><span style=\"color: #ECEFF4\">))<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                tabela<\/span><span style=\"color: #ECEFF4\">[<\/span><span style=\"color: #D8DEE9FF\">indice<\/span><span style=\"color: #ECEFF4\">].<\/span><span style=\"color: #88C0D0\">remove<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">elemento<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Chave encontrada, removemos o elemento<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                <\/span><span style=\"color: #81A1C1\">return;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Terminamos a opera\u00e7\u00e3o ap\u00f3s remover o elemento<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">public<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">static<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">void<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">main<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #ECEFF4\">[]<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">args<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Criamos uma nova inst\u00e2ncia da tabela hash<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #8FBCBB\">TabelaHash<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">new<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">TabelaHash<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Exemplo de inser\u00e7\u00e3o de elementos<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">inserir<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">chave1<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">10<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">inserir<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">chave2<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">20<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">inserir<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">chave3<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">30<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Exemplo de busca de elementos<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">valorChave2<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">buscar<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">chave2<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #D8DEE9\">System<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">out<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">println<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">Valor associado \u00e0 chave2: <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">+<\/span><span style=\"color: #D8DEE9FF\"> valorChave2<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Deve imprimir 20<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">        <\/span><span style=\"color: #616E88\">\/\/ Exemplo de remo\u00e7\u00e3o de elementos<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">remover<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">chave1<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">valorChave1<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">tabela<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">buscar<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">chave1<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #D8DEE9\">System<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">out<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">println<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">Valor associado \u00e0 chave1 ap\u00f3s remo\u00e7\u00e3o: <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">+<\/span><span style=\"color: #D8DEE9FF\"> valorChave1<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Deve imprimir -1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">\/\/ Fonte: ChatGPT<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A classe TabelaHash \u00e9 a implementa\u00e7\u00e3o da tabela hash, que usa uma lista de listas (List[]) para armazenar os elementos. Cada posi\u00e7\u00e3o do array representa um \u00edndice da tabela hash e cont\u00e9m uma lista de elementos com chaves mapeadas para esse \u00edndice.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A classe interna Elemento \u00e9 usada para representar os pares de chave-valor que ser\u00e3o armazenados na tabela hash.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O m\u00e9todo hash(String chave) calcula o \u00edndice onde a chave ser\u00e1 armazenada na tabela. Neste exemplo simples, ele usa o somat\u00f3rio dos c\u00f3digos ASCII dos caracteres da chave e, em seguida, aplica o operador de m\u00f3dulo (%) para ajustar o \u00edndice dentro do tamanho da tabela.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O m\u00e9todo inserir(String chave, int valor) insere um novo elemento na tabela hash. Ele calcula o \u00edndice da chave usando o m\u00e9todo hash() e cria um novo elemento com a chave e valor fornecidos. O novo elemento \u00e9 adicionado \u00e0 lista correspondente ao \u00edndice calculado.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O m\u00e9todo buscar(String chave) busca o valor associado a uma chave na tabela hash. Ele calcula o \u00edndice da chave usando o m\u00e9todo hash() e procura a chave na lista correspondente ao \u00edndice. Se a chave for encontrada, o valor associado \u00e9 retornado; caso contr\u00e1rio, \u00e9 retornado um valor padr\u00e3o de -1.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O m\u00e9todo remover(String chave) remove um elemento da tabela hash. Ele calcula o \u00edndice da chave usando o m\u00e9todo hash() e procura a chave na lista correspondente ao \u00edndice. Se a chave for encontrada, o elemento \u00e9 removido da lista.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O m\u00e9todo main() \u00e9 um exemplo de como usar a tabela hash. Ele cria uma nova inst\u00e2ncia da TabelaHash, insere alguns elementos, busca um valor associado a uma chave e, em seguida, remove um elemento.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Aplica\u00e7\u00f5es Pr\u00e1ticas<\/h2>\n\n\n\n<p>As tabelas hash t\u00eam aplica\u00e7\u00f5es em diversas \u00e1reas, desde o armazenamento de dados em bancos de dados at\u00e9 a otimiza\u00e7\u00e3o de caches e agiliza\u00e7\u00e3o de pesquisas em estruturas de software. Nesta se\u00e7\u00e3o, mostraremos como as tabelas hash s\u00e3o utilizadas em cen\u00e1rios reais, destacando sua relev\u00e2ncia em projetos de grande escala.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Melhores Pr\u00e1ticas e Otimiza\u00e7\u00f5es<\/h2>\n\n\n\n<p>Para obter o m\u00e1ximo desempenho das tabelas hash, \u00e9 fundamental seguir algumas melhores pr\u00e1ticas. Compartilharemos dicas valiosas para otimizar a implementa\u00e7\u00e3o, escolha de fun\u00e7\u00f5es de hash adequadas e abordagens para lidar com colis\u00f5es. Essas otimiza\u00e7\u00f5es podem fazer a diferen\u00e7a em projetos de alta demanda de processamento de dados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o<\/h2>\n\n\n\n<p>Concluiremos o artigo refor\u00e7ando a import\u00e2ncia das tabelas hash como uma ferramenta poderosa para resolver problemas de busca e acesso a dados com efici\u00eancia. Destacaremos as principais li\u00e7\u00f5es aprendidas e a relev\u00e2ncia de considerar as caracter\u00edsticas espec\u00edficas de cada aplica\u00e7\u00e3o ao escolher e implementar a estrutura de tabelas hash.<\/p>\n\n\n\n<p>As tabelas hash s\u00e3o uma pe\u00e7a-chave no universo da ci\u00eancia da computa\u00e7\u00e3o, e compreender sua mec\u00e2nica e aplicabilidade pode ser um diferencial estrat\u00e9gico em projetos de desenvolvimento e inova\u00e7\u00e3o tecnol\u00f3gica. Esperamos que este artigo forne\u00e7a uma vis\u00e3o abrangente e pr\u00e1tica sobre o tema, possibilitando o uso inteligente dessa estrutura em diversas solu\u00e7\u00f5es.<\/p>\n\n\n\n<p>Esse conte\u00fado \u00e9 parte do material disponibilizado para os participantes do meu grupo de estudos de&nbsp;<strong>Algoritmos e Estruturas de Dados<\/strong>. Voc\u00ea quer participar desse grupo?&nbsp;<strong><a href=\"https:\/\/elemarjr.com\/clube-de-estudos\/algoritmos-e-estruturas-de-dados\/\">Clique aqui e veja como funciona<\/a><\/strong>.<\/p>\n","protected":false},"featured_media":6575,"parent":0,"template":"","cursos":[5],"class_list":["post-6550","artigos","type-artigos","status-publish","has-post-thumbnail","hentry","cursos-algortimos"],"acf":[],"_links":{"self":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/artigos\/6550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/artigos"}],"about":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/types\/artigos"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/media\/6575"}],"wp:attachment":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/media?parent=6550"}],"wp:term":[{"taxonomy":"cursos","embeddable":true,"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/cursos?post=6550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}