{"id":3537,"date":"2025-10-05T00:00:00","date_gmt":"2025-10-04T22:00:00","guid":{"rendered":"https:\/\/tecnologia.euroinnova.com\/applet\/"},"modified":"2026-08-05T11:10:16","modified_gmt":"2026-08-05T09:10:16","slug":"applet","status":"publish","type":"post","link":"https:\/\/tecnologia.euroinnova.com\/en\/applet","title":{"rendered":"Applet"},"content":{"rendered":"

An applet is a small programme that runs within another application, typically a web browser. Applets are written in the Java programming language<\/a> and are used to provide interactive and dynamic features on web pages. Unlike standalone applications, applets cannot run on their own; they require a runtime environment provided by a web browser or an applet viewer.<\/p>\n

Applications of applets<\/strong><\/h2>\n

Applets have a variety of applications in web development and other areas. Some of the most common applications include:<\/p>\n

    \n
  • \n

    Interactivity on websites:<\/strong> Applets are used to add interactive elements to web pages, such as games, animations and interactive forms.<\/p>\n<\/li>\n

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    Data visualisation:<\/strong> Applets can display graphs and dynamic tables, which is useful for visualising data in real time.<\/p>\n<\/li>\n

  • \n

    Educational simulations:<\/strong> In the field of education, applets are used to create interactive simulations that help students understand complex concepts.<\/p>\n<\/li>\n

  • \n

    Calculation tools:<\/strong> Applets can provide calculation and analysis tools that run directly in the browser, without the need to install any additional software.<\/p>\n<\/li>\n

  • \n

    Security and authentication:<\/strong> Some applets are used in security systems for user authentication and data encryption.<\/p>\n<\/li>\n<\/ul>\n

    How does an applet work?<\/strong><\/h2>\n

    To understand how an applet works, it is important to be familiar with the applet\u2019s life cycle, which consists of several key methods:<\/p>\n

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    • \n

      init():<\/strong> This method is called once when the applet is loaded for the first time. This is where the resources required by the applet are initialised.<\/p>\n<\/li>\n

    • \n

      start():<\/strong> This method is called every time the applet is displayed on the screen. If the user navigates to another page and then returns, the start() method is called again.<\/p>\n<\/li>\n

    • \n

      paint(Graphics g):<\/strong> This method is used to draw on the screen. It is called whenever the applet needs to be redrawn, such as when the browser window is resized.<\/p>\n<\/li>\n

    • \n

      stop():<\/strong> This method is called when the applet is no longer visible. This is where you can free up resources that are not needed whilst the applet is not in use.<\/p>\n<\/li>\n

    • \n

      destroy():<\/strong> This method is called when the applet closes down completely. This is where all resources are released and the final clean-up tasks are carried out.<\/p>\n<\/li>\n<\/ul>\n

      How do you create an applet?<\/strong><\/h2>\n

      Creating an applet involves several steps, from writing the code to embedding it in a web page.<\/p>\n

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      • \n

        Write the applet code<\/strong>: The first step is to write the Java code for the applet. Here is a simple example of an applet that displays a message on the screen:<\/p>\n<\/li>\n

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        Compile the code:<\/strong> Once you have written the code, you need to compile it using the Java compiler (javac). This will generate a .class file containing the applet\u2019s bytecode. \u00a0javac HelloWorldApplet.java\u00a0<\/strong><\/p>\n<\/li>\n

      • \n

        Create an HTML file:<\/strong> To run the applet in a browser, you need to create an HTML file to contain it.<\/p>\n<\/li>\n

      • \n

        Run the applet:<\/strong> Open the HTML file in a browser that supports Java applets. The applet should run and display the message \u201cHello, World!\u201d.<\/p>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

        Un applet es un peque\u00f1o programa que se ejecuta dentro de otra aplicaci\u00f3n, t\u00edpicamente un navegador web. Los applets est\u00e1n […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"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-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-3537","post","type-post","status-publish","format-standard","hentry","category-metaterminos"],"acf":[],"_links":{"self":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts\/3537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/comments?post=3537"}],"version-history":[{"count":0,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts\/3537\/revisions"}],"wp:attachment":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/media?parent=3537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/categories?post=3537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/tags?post=3537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}