{"id":4799,"date":"2025-05-12T22:14:59","date_gmt":"2025-05-12T20:14:59","guid":{"rendered":"https:\/?p=4799"},"modified":"2025-05-15T15:54:06","modified_gmt":"2025-05-15T13:54:06","slug":"los-wrappers-o-clases-envoltorio-en-la-programacion-java-21","status":"publish","type":"post","link":"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/","title":{"rendered":"Wrappers or wrapper classes in Java Programming 21."},"content":{"rendered":"<figure class=\"wp-block-image size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"http:\/\/javiercachon.com\/wp-content\/uploads\/2025\/05\/Java-SE-21-a-steaming-cup-of-coffee-and-the-title-_Clases-envoltorio-Wrapper-en-Java_-with-a-color-theme-inspired-by-the-Oracle-website-1024x576.jpg\" alt=\"\" class=\"wp-image-4800\" style=\"width:1200px;height:auto\" srcset=\"https:\/\/javiercachon.com\/wp-content\/uploads\/2025\/05\/Java-SE-21-a-steaming-cup-of-coffee-and-the-title-_Clases-envoltorio-Wrapper-en-Java_-with-a-color-theme-inspired-by-the-Oracle-website-1024x576.jpg 1024w, https:\/\/javiercachon.com\/wp-content\/uploads\/2025\/05\/Java-SE-21-a-steaming-cup-of-coffee-and-the-title-_Clases-envoltorio-Wrapper-en-Java_-with-a-color-theme-inspired-by-the-Oracle-website-300x169.jpg 300w, https:\/\/javiercachon.com\/wp-content\/uploads\/2025\/05\/Java-SE-21-a-steaming-cup-of-coffee-and-the-title-_Clases-envoltorio-Wrapper-en-Java_-with-a-color-theme-inspired-by-the-Oracle-website-768x432.jpg 768w, https:\/\/javiercachon.com\/wp-content\/uploads\/2025\/05\/Java-SE-21-a-steaming-cup-of-coffee-and-the-title-_Clases-envoltorio-Wrapper-en-Java_-with-a-color-theme-inspired-by-the-Oracle-website-100x56.jpg 100w, https:\/\/javiercachon.com\/wp-content\/uploads\/2025\/05\/Java-SE-21-a-steaming-cup-of-coffee-and-the-title-_Clases-envoltorio-Wrapper-en-Java_-with-a-color-theme-inspired-by-the-Oracle-website-1536x864.jpg 1536w, https:\/\/javiercachon.com\/wp-content\/uploads\/2025\/05\/Java-SE-21-a-steaming-cup-of-coffee-and-the-title-_Clases-envoltorio-Wrapper-en-Java_-with-a-color-theme-inspired-by-the-Oracle-website.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Article table of contents.<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#1_Introduccion_a_los_Wrappers_en_Java\" >1. Introduction to Wrappers in Java<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#2_%C2%BFQue_son_los_Wrappers\" >2. What are Wrappers?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#3_%C2%BFQue_son_los_Wrappers_o_Clases_Envoltorio\" >3. What are Wrappers or Wrapper Classes?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#4_Importancia_de_los_Wrappers_en_la_Programacion_Java\" >4. Importance of Wrappers in Java Programming<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#5_Novedades_y_Mejoras_de_los_Wrappers_en_Java_SE_21\" >5. New Features and Improvements to Wrappers in Java SE 21<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#6_Historia_de_los_Tipos_Wrappers\" >6. History of Wrapper Types.<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#61_Origenes_y_Motivacion_del_Diseno_de_Wrappers_en_Java\" >6.1. Origins and Motivation of Wrapper Design in Java<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#62_Evolucion_de_Java_Desde_Java_15_hasta_Java_21\" >6.2. Evolution of Java: From Java 1.5 to Java 21<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#63_Impacto_de_los_Wrappers_en_la_Programacion_Orientada_a_Objetos\" >6.3. Impact of Wrappers on Object-Oriented Programming<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#7_Tabla_Wrappers_y_Tipos_Primitivos\" >7. Table: Wrappers and Primitive Types<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#8_Inicializacion_de_Objetos_Wrapper_en_Java_SE_21\" >8. Initializing Wrapper Objects in Java SE 21<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#81_Formas_de_inicializacion\" >8.1 Initialization forms<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#9_Cambios_en_Java_SE_21\" >9. Changes in Java SE 21<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#101_Ejemplo_completo\" >10.1 Complete example<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#11_La_Clase_String_como_Wrapper\" >11. The String Class as a Wrapper<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#12_Autoboxing_y_Unboxing_con_Ejemplos_de_Wrappers\" >12 Autoboxing and Unboxing with Wrapper Examples<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#13_Conversion_entre_Wrappers_y_Tipos_Primitivos_Ejemplos_Practicos\" >13. Conversion between Wrappers and Primitive Types: Practical Examples<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#14_Explicacion_y_Ejemplos_de_Cada_Tipo_Wrapper_en_Java_SE_21\" >14. Explanation and Examples of Each Wrapper Type in Java SE 21<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#141_La_Clase_String\" >14.1. The String Class<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#142_Byte\" >14.2. Byte<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#143_Short\" >14.3. Short<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#144_Integer\" >14.4. Integer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#145_Long\" >14.5. Long<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#146_Float\" >14.6. Float<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#147_Double\" >14.7. Double<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#148_Character\" >14.8. Character<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#149_Boolean\" >14.9. Boolean<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#15_Tabla_de_Metodos_para_Trabajar_con_Wrappers_Explicacion_y_Ejemplos\" >15. Table of Methods for Working with Wrappers: Explanation and Examples<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#16_Programa_de_EjemploWrapperjava\" >16. Sample Program Wrapper.java<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#17_Conclusion_Temas_Complementarios_Buenas_Practicas_Resumen_y_Referencias\" >17. Conclusion, Complementary Topics, Good Practices, Summary and References<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#171_Conclusion\" >17.1 Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#172_Temas_Complementarios_y_Buenas_Practicas\" >17.2 Complementary Topics and Good Practices<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#173_Resumen\" >17.3 Summary<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/javiercachon.com\/en\/los-wrappers-o-clases-envoltorio-en-la-programacion-java-21\/#174_Referencias\" >17.4 References<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Introduccion_a_los_Wrappers_en_Java\"><\/span>1. Introduction to Wrappers in Java<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p>En el ecosistema de Java, los wrappers representan un componente esencial de la programaci\u00f3n orientada a objetos. Estas clases \u201cenvuelven\u201d los tipos primitivos, permitiendo usarlos donde tradicionalmente se requieren objetos. Al conocer su funcionamiento y aplicaci\u00f3n, los desarrolladores pueden escribir c\u00f3digo m\u00e1s limpio, robusto y adaptable a las expectativas actuales de la plataforma.<\/p>\n\n\n\n<p>Java es uno de los lenguajes m\u00e1s utilizados en la industria del software, y uno de los fundamentos de su dise\u00f1o es poder tratar los tipos primitivos como objetos en los contextos en que se requieran. Los <em>wrappers<\/em> o clases envoltorio hacen posible esta transici\u00f3n, permitiendo adem\u00e1s el uso de m\u00e9todos adicionales para la manipulaci\u00f3n y validaci\u00f3n de datos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_%C2%BFQue_son_los_Wrappers\"><\/span>2. What are Wrappers?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Wrappers are classes that encapsulate primitive types (such as <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double<\/code>, etc.) y los convierten en objetos. Esto es fundamental para trabajar con APIs y colecciones de Java, que requieren objetos en lugar de datos primitivos. Con la evoluci\u00f3n hacia Java 21, son tambi\u00e9n objeto de optimizaciones en t\u00e9rminos de rendimiento y nuevas implementaciones de funcionalidad, como la integraci\u00f3n con el pattern matching, por ejemplo, la clase <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code> sirve para representar valores enteros, permitiendo no solo la manipulaci\u00f3n de datos aritm\u00e9ticos, sino tambi\u00e9n el uso de m\u00e9todos \u00fatiles como <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">parseInt()<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf()<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">intValue()<\/code>. Este mecanismo es vital para trabajar con colecciones y APIs que requieren argumentos objeto, facilitando la interacci\u00f3n con librer\u00edas y frameworks sin tener que recurrir a soluciones complejas o no tipadas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_%C2%BFQue_son_los_Wrappers_o_Clases_Envoltorio\"><\/span>3. What are Wrappers or Wrapper Classes?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In Java, every primitive type has an associated class (called <em>wrapper<\/em>) that allows it to behave like an object. For example, the primitive type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int<\/code> can be wrapped using the class <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code>These classes offer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>M\u00e9todos \u00fatiles:<\/strong> Conversi\u00f3n desde\/hacia cadenas de texto, comparaciones, etc.<\/li>\n\n\n\n<li><strong>Autoboxing and Unboxing:<\/strong> Permiten la conversi\u00f3n autom\u00e1tica entre un primitivo y su clase wrapper y viceversa.<\/li>\n\n\n\n<li><strong>Integraci\u00f3n en Colecciones:<\/strong> Since collections (such as <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">ArrayList<\/code>) only accept objects.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Importancia_de_los_Wrappers_en_la_Programacion_Java\"><\/span>4. Importance of Wrappers in Java Programming<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The importance of wrappers lies in their ability to bridge the world of primitive types with that of objects. This allows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Integraci\u00f3n con colecciones:<\/strong> Las clases de la biblioteca est\u00e1ndar (como <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">ArrayList<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">HashMap<\/code>, etc.) solo pueden almacenar objetos. Gracias a los wrappers, es posible incluir valores num\u00e9ricos o booleanos sin recurrir a soluciones no tipadas.<\/li>\n\n\n\n<li><strong>Facilidad de conversi\u00f3n:<\/strong> Con la autoboxing y unboxing, el compilador se encarga de la conversi\u00f3n impl\u00edcita entre primitivos y objetos, lo que simplifica el c\u00f3digo y mejora su legibilidad.<\/li>\n\n\n\n<li><strong>Uso de m\u00e9todos especializados:<\/strong> Los wrappers ofrecen m\u00e9todos \u00fatiles que facilitan la conversi\u00f3n de cadenas a n\u00fameros y operaciones de comparaci\u00f3n, entre otros, lo que extiende las capacidades b\u00e1sicas del lenguaje.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Novedades_y_Mejoras_de_los_Wrappers_en_Java_SE_21\"><\/span>5. New Features and Improvements to Wrappers in Java SE 21<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Java 21\u2011SE has implemented several improvements in wrapper handling:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Optimizaci\u00f3n del Autoboxing\/Unboxing:<\/strong> Internal adjustments have been made to reduce overhead on bulk conversions during operations with streams and lambda expressions.<\/li>\n\n\n\n<li><strong>Improved Caching:<\/strong> Caching mechanisms for certain ranges (as in <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code> and <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Short<\/code>) have been optimized to reduce the memory footprint.<\/li>\n\n\n\n<li><strong>Compatibility with Functional Paradigms:<\/strong> La integraci\u00f3n con las APIs de streams y la programaci\u00f3n funcional se ha reforzado, permitiendo utilizar wrappers de manera m\u00e1s eficiente en operaciones de agregaci\u00f3n y transformaci\u00f3n.<\/li>\n<\/ul>\n\n\n\n<p>Estas mejoras permiten que el uso de wrappers sea m\u00e1s seguro y eficiente, sobre todo en aplicaciones de alto rendimiento o en entornos de microservicios.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Historia_de_los_Tipos_Wrappers\"><\/span>6. History of Wrapper Types.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"61_Origenes_y_Motivacion_del_Diseno_de_Wrappers_en_Java\"><\/span>6.1. Origins and Motivation of Wrapper Design in Java<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The <em>wrappers<\/em> surgieron para integrar los tipos primitivos en el paradigma orientado a objetos. Esto permiti\u00f3, por ejemplo, utilizar valores num\u00e9ricos en contextos donde se esperaba un objeto, facilitando la interoperabilidad en APIs y frameworks orientados a objetos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"62_Evolucion_de_Java_Desde_Java_15_hasta_Java_21\"><\/span>6.2. Evolution of Java: From Java 1.5 to Java 21<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Java 1.5:<\/strong> Autoboxing\/unboxing was introduced, reducing the need to manually instantiate wrapper classes.<\/li>\n\n\n\n<li><strong>Intermediate Versions:<\/strong> Se a\u00f1adieron mejoras en m\u00e9todos y en la gesti\u00f3n interna de memoria (como el caching en <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code>).<\/li>\n\n\n\n<li><strong>Java 21\u2011SE:<\/strong> Las optimizaciones actuales reducen la sobrecarga del autoboxing, mejoran la integraci\u00f3n con expresiones lambda y streams, y optimizan el rendimiento en entornos concurrentes.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"63_Impacto_de_los_Wrappers_en_la_Programacion_Orientada_a_Objetos\"><\/span>6.3. Impact of Wrappers on Object-Oriented Programming<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>By allowing each primitive value to be treated as an object, wrappers make it easy to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La extensi\u00f3n de funcionalidades mediante m\u00e9todos espec\u00edficos.<\/li>\n\n\n\n<li>Interoperability with APIs that require objects.<\/li>\n\n\n\n<li>Un enfoque coherente en la implementaci\u00f3n de patrones de dise\u00f1o orientados a objetos.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Tabla_Wrappers_y_Tipos_Primitivos\"><\/span>7. Table: Wrappers and Primitive Types<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">Table: Primitive Types and Wrapper Classes<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Primitive Type<\/strong><\/th><th><strong>Wrapper Class<\/strong><\/th><th><strong>Ejemplo de Declaraci\u00f3n<\/strong><\/th><\/tr><\/thead><tbody><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int num = 10;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer numObj = 10;<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">long<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Long<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">long num = 10L;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Long numObj = 10L;<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Float<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float num = 3.14f;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Float numObj = 3.14f;<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double num = 3.14;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double numObj = 3.14;<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">byte<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Byte<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">byte num = 127;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Byte numObj = 127;<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">short<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Short<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">short num = 1000;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Short numObj = 1000;<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">boolean<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">boolean flag = true;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean flagObj = true;<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">char<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Character<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">char letra = &#039;a&#039;;<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Character charObj = &#039;a&#039;;<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\"><\/ol>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"8_Inicializacion_de_Objetos_Wrapper_en_Java_SE_21\"><\/span>8. Initializing Wrapper Objects in Java SE 21<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p>In Java SE 21, wrapper objects (which wrap primitive types) can be initialized in several ways:<\/p>\n\n\n\n<p>In Java, the <em>wrappers<\/em> are classes that <strong>wrap<\/strong> primitive types (such as <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">boolean<\/code>, etc.) permitiendo tratarlos como objetos. Esta caracter\u00edstica es fundamental para aprovechar el conjunto de funcionalidades orientado a objetos del lenguaje y para integrarse en colecciones y APIs que requieren objetos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"81_Formas_de_inicializacion\"><\/span>8.1 Initialization forms<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><em>Example of autoboxing:<\/em><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">int numeroPrimitivo = 10;  \nInteger numeroWrapper = numeroPrimitivo; \/\/ Conversi\u00f3n autom\u00e1tica (autoboxing)<\/pre>\n\n\n\n<p>Conversi\u00f3n autom\u00e1tica (autoboxing).<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Integer i = new Integer(10); \/\/ Deprecated\nDouble d = new Double(3.14); \/\/ Deprecated<\/pre>\n\n\n\n<p>M\u00e9todo valueOf() (recomendado):<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Integer i = Integer.valueOf(10);\nDouble d = Double.valueOf(3.14);\nBoolean b = Boolean.valueOf(true);<\/pre>\n\n\n\n<p>Autoboxing (conversi\u00f3n autom\u00e1tica desde Java 5):<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Integer i = 10; \/\/ Autoboxing de int a Integer\nDouble d = 3.14; \/\/ Autoboxing de double a Double<\/pre>\n\n\n\n<p>String parsing:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Integer i = Integer.parseInt(\"10\");\nDouble d = Double.parseDouble(\"3.14\");<\/pre>\n\n\n\n<p>Boolean class with True or False values:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Boolean b = Boolean.TRUE;\nBoolean f = Boolean.FALSE;<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"9_Cambios_en_Java_SE_21\"><\/span>9. Changes in Java SE 21<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>En Java SE 21, los constructores de los wrappers est\u00e1n marcados como&nbsp;<code class=\"\" data-line=\"\" data-no-auto-translation=\"\">@Deprecated(forRemoval=true)<\/code>, which means:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Its use is not recommended<\/li>\n\n\n\n<li>Ser\u00e1n eliminados en una futura versi\u00f3n de Java<\/li>\n\n\n\n<li>It is recommended to use&nbsp;<code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf()<\/code>&nbsp;or autoboxing instead<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"101_Ejemplo_completo\"><\/span>10.1 Complete example<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">public class WrapperInitialization {\n    public static void main(String[] args) {\n        \/\/ Formas modernas recomendadas\n        Integer num1 = 42; \/\/ Autoboxing\n        Integer num2 = Integer.valueOf(42);\n        Integer num3 = Integer.parseInt(\"42\");\n        \n        Double decimal1 = 3.14; \/\/ Autoboxing\n        Double decimal2 = Double.valueOf(3.14);\n        \n        Boolean flag1 = true; \/\/ Autoboxing\n        Boolean flag2 = Boolean.valueOf(true);\n        Boolean flag3 = Boolean.parseBoolean(\"TRUE\");\n        \n        \/\/ Forma antigua (deprecated en Java SE 21)\n        Integer deprecatedNum = new Integer(42); \/\/ No recomendado\n    }\n}<\/pre>\n\n\n\n<p>La forma m\u00e1s com\u00fan y recomendada en Java moderno es utilizar autoboxing o los m\u00e9todos&nbsp;<code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf()<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_La_Clase_String_como_Wrapper\"><\/span>11. The String Class as a Wrapper<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Although the class <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">String<\/code> se comporta de manera especial en Java (por su inmutabilidad y gesti\u00f3n en el pool de cadenas), tambi\u00e9n puede ser considerada un tipo de dato de referencia similar a los wrappers.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Caracter\u00edsticas principales del String:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Immutability:<\/strong> Once created, its content cannot be changed.<\/li>\n\n\n\n<li><strong>M\u00e9todos \u00fatiles:<\/strong> <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">length()<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">substring()<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">replace()<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">toUpperCase()<\/code>, etc.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Example:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">String saludar = \"Hola, Java 21!\";\nSystem.out.println(\"Longitud del String: \" + saludar.length());\nSystem.out.println(\"En may\u00fasculas: \" + saludar.toUpperCase());<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_Autoboxing_y_Unboxing_con_Ejemplos_de_Wrappers\"><\/span>12 Autoboxing and Unboxing with Wrapper Examples<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>He <strong>autoboxing<\/strong> permite que el compilador convierta autom\u00e1ticamente un valor primitivo en su objeto wrapper correspondiente. De igual modo, el <strong>unboxing<\/strong> converts the object to its original value.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Autoboxing:<\/strong> Conversi\u00f3n autom\u00e1tica de un primitivo a su clase wrapper.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Unboxing:<\/strong> Reverse process, from wrapper object to its primitive type.<\/li>\n<\/ul>\n\n\n\n<p><strong>General Example:<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">public class EjemploAutoboxingUnboxing {\n    public static void main(String[] args) {\n        \/\/ Autoboxing\n        Integer enteroWrapper = 50;  \/\/ int 50 convertido a Integer\n        Double dobleWrapper = 3.14;    \/\/ double 3.14 convertido a Double\n        \n        \/\/ Unboxing\n        int enteroPrimitivo = enteroWrapper;  \n        double doblePrimitivo = dobleWrapper;\n        \n        System.out.println(\"Integer: \" + enteroWrapper);\n        System.out.println(\"int: \" + enteroPrimitivo);\n        System.out.println(\"Double: \" + dobleWrapper);\n        System.out.println(\"double: \" + doblePrimitivo);\n    }\n}<\/pre>\n\n\n\n<p>Este mecanismo se aplica para cada uno de los wrappers, facilitando la programaci\u00f3n sin la necesidad de conversi\u00f3n manual expl\u00edcita.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"13_Conversion_entre_Wrappers_y_Tipos_Primitivos_Ejemplos_Practicos\"><\/span>13. Conversion between Wrappers and Primitive Types: Practical Examples<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La conversi\u00f3n se realiza mediante m\u00e9todos espec\u00edficos de cada clase wrapper, as\u00ed como a trav\u00e9s del autoboxing\/unboxing.<\/p>\n\n\n\n<p><strong>Example for Integer:<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">public class EjemploConversion {\n    public static void main(String[] args) {\n        String numeroStr = \"1234\";\n        \n        \/\/ Conversi\u00f3n de String a Integer (wrapper)\n        Integer numeroWrapper = Integer.valueOf(numeroStr);\n        \n        \/\/ Conversi\u00f3n a int (unboxing)\n        int numeroPrimitivo = Integer.parseInt(numeroStr);\n        \n        System.out.println(\"Wrapper: \" + numeroWrapper);\n        System.out.println(\"Primitivo: \" + numeroPrimitivo);\n    }\n}<\/pre>\n\n\n\n<p>Este tipo de conversi\u00f3n es similar para cada wrapper (por ejemplo, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double.parseDouble()<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean.parseBoolean()<\/code>, etc.), which unifies the way data is processed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"14_Explicacion_y_Ejemplos_de_Cada_Tipo_Wrapper_en_Java_SE_21\"><\/span>14. Explanation and Examples of Each Wrapper Type in Java SE 21<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"141_La_Clase_String\"><\/span>14.1. The String Class<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Although <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">String<\/code> It is not a wrapper for a primitive, its importance and extensive use as an immutable object make it fundamental.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">String mensaje = \"Java 21 es innovador\";\nSystem.out.println(\"Mensaje original: \" + mensaje);\nSystem.out.println(\"Mensaje en min\u00fasculas: \" + mensaje.toLowerCase());<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"142_Byte\"><\/span>14.2. Byte<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The class <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Byte<\/code> wraps the type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">byte<\/code>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Byte b = Byte.valueOf((byte) 10);\nSystem.out.println(\"Valor Byte: \" + b);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"143_Short\"><\/span>14.3. Short<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Wrap the type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">short<\/code>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Short s = Short.valueOf((short) 20);\nSystem.out.println(\"Valor Short: \" + s);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"144_Integer\"><\/span>14.4. Integer<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The class <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code> es probablemente de las m\u00e1s utilizadas al envolver un <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int<\/code>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Integer i = Integer.valueOf(30);\nSystem.out.println(\"Valor Integer: \" + i);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"145_Long\"><\/span>14.5. Long<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Wrap the type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">long<\/code>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Long l = Long.valueOf(40L);\nSystem.out.println(\"Valor Long: \" + l);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"146_Float\"><\/span>14.6. Float<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Wrap the type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float<\/code>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Float f = Float.valueOf(5.75f);\nSystem.out.println(\"Valor Float: \" + f);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"147_Double\"><\/span>14.7. Double<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Wrap the type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double<\/code>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Double d = Double.valueOf(9.99);\nSystem.out.println(\"Valor Double: \" + d);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"148_Character\"><\/span>14.8. Character<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Wrap the type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">char<\/code>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Character c = Character.valueOf('A');\nSystem.out.println(\"Valor Character: \" + c);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"149_Boolean\"><\/span>14.9. Boolean<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Wrap the type <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">boolean<\/code>. Este wrapper facilita la conversi\u00f3n de cadenas a valores l\u00f3gicos.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">Boolean bool = Boolean.valueOf(\"true\");\nSystem.out.println(\"Valor Boolean: \" + bool);<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"15_Tabla_de_Metodos_para_Trabajar_con_Wrappers_Explicacion_y_Ejemplos\"><\/span>15. Table of Methods for Working with Wrappers: Explanation and Examples<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Wrapper Class<\/strong><\/th><th><strong>M\u00e9todo<\/strong><\/th><th><strong>Descripci\u00f3n<\/strong><\/th><th><strong>Example of Use<\/strong><\/th><\/tr><\/thead><tbody><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">parseInt(String)<\/code><\/td><td>Converts a string to <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int num = Integer.parseInt(&quot;123&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf(String)<\/code><\/td><td>Returns an object <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code> from a chain<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer numObj = Integer.valueOf(&quot;123&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">intValue()<\/code><\/td><td>Returns the primitive value <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int n = numObj.intValue();<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">compareTo(Integer)<\/code><\/td><td>Compare two objects <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">int cmp = numObj.compareTo(200);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Long<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">parseLong(String)<\/code><\/td><td>Converts a string to a <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">long<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">long l = Long.parseLong(&quot;9876543210&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Long<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf(String)<\/code><\/td><td>Returns an object <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Long<\/code> from a chain<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Long lObj = Long.valueOf(&quot;9876543210&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Long<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">longValue()<\/code><\/td><td>Returns the primitive value <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">long<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">long lPrim = lObj.longValue();<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Float<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">parseFloat(String)<\/code><\/td><td>Converts a string to a <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float f = Float.parseFloat(&quot;3.14&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Float<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf(String)<\/code><\/td><td>Returns an object <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Float<\/code> from a chain<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Float fObj = Float.valueOf(&quot;3.14&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Float<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">floatValue()<\/code><\/td><td>Returns the primitive value <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">float fPrim = fObj.floatValue();<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">parseDouble(String)<\/code><\/td><td>Converts a string to a <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double d = Double.parseDouble(&quot;3.14&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf(String)<\/code><\/td><td>Returns an object <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double<\/code> from a chain<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double dObj = Double.valueOf(&quot;3.14&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Double<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">doubleValue()<\/code><\/td><td>Returns the primitive value <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">double dPrim = dObj.doubleValue();<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">parseBoolean(String)<\/code><\/td><td>Converts a string to a value <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">boolean<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">boolean b = Boolean.parseBoolean(&quot;true&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf(String)<\/code><\/td><td>Returns an object <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean<\/code> from a chain<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean bObj = Boolean.valueOf(&quot;true&quot;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Character<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">toString(char)<\/code><\/td><td>Convert a <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">char<\/code> en su representaci\u00f3n de cadena<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">String s = Character.toString(&#039;A&#039;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Character<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">isDigit(char)<\/code><\/td><td>Verifica si un caracter es d\u00edgito (m\u00e9todo est\u00e1tico)<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">boolean esDigito = Character.isDigit(&#039;5&#039;);<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Character<\/code><\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">toLowerCase(char)<\/code><\/td><td>Convierte un caracter a min\u00fascula (m\u00e9todo est\u00e1tico)<\/td><td><code class=\"\" data-line=\"\" data-no-auto-translation=\"\">char lower = Character.toLowerCase(&#039;A&#039;);<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><em>Note:<\/em> Las clases wrapper tambi\u00e9n poseen m\u00e9todos espec\u00edficos como <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">isDigit()<\/code> in <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Character<\/code> either <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">compare()<\/code> in <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Integer<\/code>, que permiten realizar comparaciones y validaciones de forma m\u00e1s precisa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"16_Programa_de_EjemploWrapperjava\"><\/span>16. Sample Program Wrapper.java<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>El siguiente programa integra los conceptos explicados en este documento. Resume la inicializaci\u00f3n, conversi\u00f3n, autoboxing, unboxing y uso de m\u00e9todos de diversos wrappers.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">public class EjemploWrapper {\n    public static void main(String[] args) {\n        \/\/ Autoboxing y unboxing\n        Integer entero = 100;         \/\/ Autoboxing\n        int numero = entero;          \/\/ Unboxing\n        \n        \/\/ Conversi\u00f3n desde String hacia Integer y viceversa\n        String numStr = \"250\";\n        Integer numeroWrapper = Integer.valueOf(numStr);\n        int numPrim = Integer.parseInt(numStr);\n        \n        \/\/ Uso de otros wrappers\n        Byte b = Byte.valueOf((byte) 10);\n        Short s = Short.valueOf((short) 20);\n        Long l = Long.valueOf(40L);\n        Float f = Float.valueOf(3.14f);\n        Double d = Double.valueOf(9.99);\n        Character c = Character.valueOf('J');\n        Boolean bool = Boolean.valueOf(\"true\");\n        \n        \/\/ Mostrar resultados\n        System.out.println(\"Integer (Autoboxing): \" + entero);\n        System.out.println(\"int (Unboxing): \" + numero);\n        System.out.println(\"Integer from String (valueOf): \" + numeroWrapper);\n        System.out.println(\"int from String (parseInt): \" + numPrim);\n        System.out.println(\"Byte: \" + b);\n        System.out.println(\"Short: \" + s);\n        System.out.println(\"Long: \" + l);\n        System.out.println(\"Float: \" + f);\n        System.out.println(\"Double: \" + d);\n        System.out.println(\"Character: \" + c);\n        System.out.println(\"Boolean: \" + bool);\n        \n        \/\/ Comparaciones con wrappers\n        if (entero.compareTo(150) &lt; 0) {\n            System.out.println(entero + \" es menor que 150.\");\n        } else {\n            System.out.println(entero + \" es mayor o igual que 150.\");\n        }\n    }\n}<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"17_Conclusion_Temas_Complementarios_Buenas_Practicas_Resumen_y_Referencias\"><\/span>17. Conclusion, Complementary Topics, Good Practices, Summary and References<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"171_Conclusion\"><\/span>17.1 Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The <em>wrappers<\/em> o clases envoltorio constituyen una herramienta esencial en Java. Permiten transformar los valores primitivos en objetos, facilitando la integraci\u00f3n con colecciones, la conversi\u00f3n y el uso de funcionalidades avanzadas (como el pattern matching en Java 21). Su manejo, a trav\u00e9s del autoboxing y unboxing, junto con los m\u00e9todos espec\u00edficos de cada clase, permite escribir c\u00f3digo m\u00e1s limpio, seguro y expresivo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"172_Temas_Complementarios_y_Buenas_Practicas\"><\/span>17.2 Complementary Topics and Good Practices<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Null and Error Control:<\/strong> Siempre verificar que los objetos wrapper no sean nulos antes de operar sobre ellos para evitar excepciones en tiempo de ejecuci\u00f3n al hacer unboxing.<\/li>\n\n\n\n<li><strong>Performance Considerations:<\/strong> Aunque el autoboxing simplifica la escritura del c\u00f3digo, es importante evitar conversiones innecesarias en bucles o c\u00e1lculos intensivos.<\/li>\n\n\n\n<li><strong>Appropriate Comparisons:<\/strong> Use <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">equals()<\/code> rather <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">==<\/code> para comparar el contenido de objetos wrapper, ya que este \u00faltimo compara referencias.<\/li>\n\n\n\n<li><strong>Uso de M\u00e9todos Especializados:<\/strong> Aprovechar m\u00e9todos como <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">parseXxx<\/code>, <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">valueOf<\/code> and <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">xxxValue()<\/code> to achieve safe and efficient conversions.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"173_Resumen\"><\/span>17.3 Summary<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This document has explained in detail:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La teor\u00eda y pr\u00e1ctica detr\u00e1s de los wrappers.<\/li>\n\n\n\n<li>C\u00f3mo se inicializan y utilizan en Java 21.<\/li>\n\n\n\n<li>Detailed examples for each wrapper type: <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Byte<\/code> to <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">Boolean<\/code>, including class <code class=\"\" data-line=\"\" data-no-auto-translation=\"\">String<\/code> as a special data type.<\/li>\n\n\n\n<li>Tabla de m\u00e9todos comunes que facilitan la conversi\u00f3n y comparaci\u00f3n.<\/li>\n\n\n\n<li>An example program that summarizes the concepts covered.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"174_Referencias\"><\/span>17.4 References<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Documentaci\u00f3n Oficial de Oracle:<\/strong> Java SE Documentation<\/li>\n\n\n\n<li><strong>Tutoriales y Art\u00edculos Especializados:<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u201cClases Wrapper en Java: Conceptos y Ejemplos\u201d<\/li>\n\n\n\n<li>\u201cAutoboxing y Unboxing en Java 21: Mejoras y Ejemplos Pr\u00e1cticos\u201d<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Blogs T\u00e9cnicos y Foros:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Art\u00edculos en Medium y StackOverflow sobre optimizaci\u00f3n y buenas pr\u00e1cticas en el uso de wrappers.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<div style='text-align:center' class='yasr-auto-insert-overall'><\/div><div style='text-align:center' class='yasr-auto-insert-visitor'><\/div>","protected":false},"excerpt":{"rendered":"<p>1. Introducci\u00f3n a los Wrappers en Java En el ecosistema de Java, los wrappers representan un componente esencial de la programaci\u00f3n orientada a objetos. Estas clases \u201cenvuelven\u201d los tipos primitivos, permitiendo usarlos donde tradicionalmente se requieren objetos. Al conocer su funcionamiento y aplicaci\u00f3n, los desarrolladores pueden escribir c\u00f3digo m\u00e1s limpio, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4800,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"jetpack_post_was_ever_published":false,"yasr_overall_rating":0,"yasr_post_is_review":"","yasr_auto_insert_disabled":"","yasr_review_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5,176,265],"tags":[13,14,15,19,27],"class_list":["post-4799","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-desarrollo","category-desarrollo-web","category-java","tag-ide","tag-java","tag-linux","tag-mx-linux","tag-oracle"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Los Wrappers o clases envoltorio en la Programaci\u00f3n Java 21. | javiercachon.com<\/title>\n<meta name=\"description\" content=\"En el ecosistema de Java, los wrappers representan un componente esencial de la programaci\u00f3n orientada a objetos. 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