{"id":9802,"date":"2026-08-10T10:11:30","date_gmt":"2026-08-10T10:11:30","guid":{"rendered":"https:\/\/nokobox.com\/index.php\/item\/oreilly-java-se-21-developer-1z0-830-2025-4\/"},"modified":"2026-08-10T10:11:30","modified_gmt":"2026-08-10T10:11:30","slug":"oreilly-java-se-21-developer-1z0-830-2025-4","status":"publish","type":"digital_item","link":"https:\/\/nokobox.com\/index.php\/item\/oreilly-java-se-21-developer-1z0-830-2025-4\/","title":{"rendered":"Oreilly \u2013 Java SE 21 Developer (1Z0-830) 2025-4"},"content":{"rendered":"<div class=\"w-post-elm post_content\">\n<h2>Description<\/h2>\n<p dir=\"ltr\">Java SE 21 Developer (1Z0-830) is a certification preparation course (1Z0-830) published by Oreilly Online Academy. It is a comprehensive certification preparation course designed for developers who intend to become Oracle Certified Professionals in Java SE 21. This course dives deep into the latest features and enhancements introduced in Java 21 and equips learners with the skills needed to build robust, efficient, and maintainable Java. Whether you are advancing your career or looking to validate your Java expertise with an industry-recognized certification, this course provides the knowledge and practical experience needed to master core and advanced concepts in Java programming.<\/p>\n<p dir=\"ltr\">This course covers essential Java topics including object-oriented programming, modularity, exception handling, collections, generics, and functional programming with streams and lambdas. Learners work through real-world coding exercises, understand JVM behavior, master multithreading and concurrency techniques, and practice file I\/O and data management. In addition, the course includes practice tests, exam strategies, and code optimization practices to ensure confidence and preparation for the 1Z0-830 certification exam.<\/p>\n<h3>What you will learn in Java SE 21 Developer (1Z0-830):<\/h3>\n<ul>\n<li>Basics, References, Aliases, and Equality<\/li>\n<li>Text Management<\/li>\n<li>Date-Time API<\/li>\n<li>Flow Control Basics<\/li>\n<li>Flow Control with Exceptions<\/li>\n<li>Custom Exceptions<\/li>\n<li>And \u2026<\/li>\n<\/ul>\n<h3>Course specifications<\/h3>\n<p dir=\"ltr\">Publisher: <a href=\"https:\/\/href.li\/?https:\/\/www.oreilly.com\/library\/view\/java-se-21\/9780135461846\/\" target=\"_blank\" rel=\"noopener\">Oreilly<\/a><br \/>Instructors: Simon Roberts<br \/>Language: English<br \/>Level: Introductory to Advanced<br \/>Number of Lessons: 186<br \/>Duration: 20 hours and 12 minutes<\/p>\n<h3>Course topics<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-978314\" src=\"https:\/\/downloadly.ir\/wp-content\/uploads\/2025\/04\/Java-SE-21-Developer-1Z0-830-Co1-scaled.png\" alt=\"Java SE 21 Developer (1Z0-830) Content\" width=\"299\" height=\"2560\"> <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-978313\" src=\"https:\/\/downloadly.ir\/wp-content\/uploads\/2025\/04\/Java-SE-21-Developer-1Z0-830-Co2-scaled.png\" alt=\"Java SE 21 Developer (1Z0-830) Content\" width=\"299\" height=\"2560\"><\/p>\n<h3>Java SE 21 Developer (1Z0-830) Prerequisites<\/h3>\n<p>None<\/p>\n<h3>Pictures<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-978311\" src=\"https:\/\/downloadly.ir\/wp-content\/uploads\/2025\/04\/Java-SE-21-Developer-1Z0-830.png\" alt=\"Java SE 21 Developer (1Z0-830)\" width=\"1059\" height=\"519\"><\/p>\n<h3>Java SE 21 Developer (1Z0-830) introduction video<\/h3>\n<div style=\"width: 640px;\" class=\"wp-video\"><span class=\"mejs-offscreen\">Video Player<\/span><\/p>\n<div id=\"mep_0\" class=\"mejs-container mejs-container-keyboard-inactive wp-video-shortcode mejs-video\" tabindex=\"0\" role=\"application\" aria-label=\"Video Player\" style=\"width: 640px; height: 360px; min-width: 217px;\">\n<div class=\"mejs-inner\">\n<div class=\"mejs-mediaelement\"><mediaelementwrapper id=\"video-161819-1\"><video class=\"wp-video-shortcode\" id=\"video-161819-1_html5\" width=\"640\" height=\"360\" preload=\"metadata\" src=\"https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/Java_SE_21_Developer_1Z0_830_Downloadly.ir.mp4?_=1\" style=\"width: 640px; height: 360px;\"><source type=\"video\/mp4\" src=\"https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/Java_SE_21_Developer_1Z0_830_Downloadly.ir.mp4?_=1\"><a href=\"https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/Java_SE_21_Developer_1Z0_830_Downloadly.ir.mp4?nocache=1786136062221\">https:\/\/dl.downloadly.ir\/Files\/Elearning\/Sample\/Java_SE_21_Developer_1Z0_830_Downloadly.ir.mp4<\/a><\/video><\/mediaelementwrapper><\/div>\n<div class=\"mejs-layers\">\n<div class=\"mejs-poster mejs-layer\" style=\"display: none; width: 100%; height: 100%;\"><\/div>\n<div class=\"mejs-overlay mejs-layer\" style=\"display: none; width: 100%; height: 100%;\">\n<div class=\"mejs-overlay-loading\"><span class=\"mejs-overlay-loading-bg-img\"><\/span><\/div>\n<\/div>\n<div class=\"mejs-overlay mejs-layer\" style=\"display: none; width: 100%; height: 100%;\">\n<div class=\"mejs-overlay-error\"><\/div>\n<\/div>\n<div class=\"mejs-overlay mejs-layer mejs-overlay-play\" style=\"width: 100%; height: 100%;\">\n<div class=\"mejs-overlay-button\" role=\"button\" tabindex=\"0\" aria-label=\"Play\" aria-pressed=\"false\"><\/div>\n<\/div>\n<\/div>\n<div class=\"mejs-controls\">\n<div class=\"mejs-button mejs-playpause-button mejs-play\"><button type=\"button\" aria-controls=\"mep_0\" title=\"Play\" aria-label=\"Play\" tabindex=\"0\"><\/button><\/div>\n<div class=\"mejs-time mejs-currenttime-container\" role=\"timer\" aria-live=\"off\"><span class=\"mejs-currenttime\">00:00<\/span><\/div>\n<div class=\"mejs-time-rail\"><span class=\"mejs-time-total mejs-time-slider\" role=\"slider\" tabindex=\"0\" aria-label=\"Time Slider\" aria-valuemin=\"0\" aria-valuemax=\"0\" aria-valuenow=\"0\" aria-valuetext=\"00:00\"><span class=\"mejs-time-buffering\" style=\"display: none;\"><\/span><span class=\"mejs-time-loaded\"><\/span><span class=\"mejs-time-current\"><\/span><span class=\"mejs-time-hovered no-hover\"><\/span><span class=\"mejs-time-handle\"><span class=\"mejs-time-handle-content\"><\/span><\/span><span class=\"mejs-time-float\"><span class=\"mejs-time-float-current\">00:00<\/span><span class=\"mejs-time-float-corner\"><\/span><\/span><\/span><\/div>\n<div class=\"mejs-time mejs-duration-container\"><span class=\"mejs-duration\">00:00<\/span><\/div>\n<div class=\"mejs-button mejs-volume-button mejs-mute\"><button type=\"button\" aria-controls=\"mep_0\" title=\"Mute\" aria-label=\"Mute\" tabindex=\"0\"><\/button><a href=\"javascript:void(0);\" class=\"mejs-volume-slider\" aria-label=\"Volume Slider\" aria-valuemin=\"0\" aria-valuemax=\"100\" role=\"slider\" aria-orientation=\"vertical\"><span class=\"mejs-offscreen\">Use Up\/Down Arrow keys to increase or decrease volume.<\/span><\/p>\n<div class=\"mejs-volume-total\">\n<div class=\"mejs-volume-current\" style=\"bottom: 0px; height: 100%;\"><\/div>\n<div class=\"mejs-volume-handle\" style=\"bottom: 100%; margin-bottom: -3px;\"><\/div>\n<\/div>\n<p><\/a><\/div>\n<div class=\"mejs-button mejs-fullscreen-button\"><button type=\"button\" aria-controls=\"mep_0\" title=\"Fullscreen\" aria-label=\"Fullscreen\" tabindex=\"0\"><\/button><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"notranslate\">Installation guide<\/span><\/h3>\n<p dir=\"ltr\">After Extract, watch with your favorite Player.<\/p>\n<p dir=\"ltr\">Subtitle: None<\/p>\n<p dir=\"ltr\">Quality: 720p<\/p>\n<p dir=\"ltr\">The new 2025\/4 version has increased the number of lessons by 1 compared to the old one.<\/p>\n<h3>Download link<\/h3>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part01.rar?nocache=1786136055\">Download Part 1 \u2013 4 GB<\/a><\/p>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part02.rar?nocache=1786136055\">Download Part 2 \u2013 4 GB<\/a><\/p>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part03.rar?nocache=1786136055\">Download Part 3 \u2013 4 GB<\/a><\/p>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part04.rar?nocache=1786136055\">Download Part 4 \u2013 4 GB<\/a><\/p>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part05.rar?nocache=1786136055\">Download Part 5 \u2013 4 GB<\/a><\/p>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part06.rar?nocache=1786136055\">Download Part 6 \u2013 4 GB<\/a><\/p>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part07.rar?nocache=1786136055\">Download Part 7 \u2013 4 GB<\/a><\/p>\n<p><a href=\"https:\/\/dl2.downloadly.ir\/Files\/Elearning\/Oreilly_Java_SE_21_Developer_1Z0-830_2025-4_Downloadly.ir.part08.rar?nocache=1786136055\">Download Part 8 \u2013 2.02 GB<\/a><\/p>\n<h5>File password (s):&nbsp;<a>www.downloadly.ir<\/a><\/h5>\n<h3>Size<\/h3>\n<p dir=\"ltr\">30 GB<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Description Java SE 21 Developer (1Z0-830) is a certification preparation course (1Z0-830) published by Oreilly Online Academy. It is a comprehensive certificat<\/p>\n","protected":false},"author":1,"template":"","dgi_category":[10458],"dgi_tag":[83960,83961,83962,83963,83964,83965,83966,83967,83968,34261],"class_list":["post-9802","digital_item","type-digital_item","status-publish","has-post-thumbnail","hentry","dgi_category-video-tutorials","dgi_tag-java-se-21-developer-1z0-830","dgi_tag-java-se-21-developer-1z0-830-download","dgi_tag-java-se-21-developer-1z0-830-free","dgi_tag-java-se-21-developer-1z0-830-free-download","dgi_tag-oreilly-java-se-21-developer-1z0-830","dgi_tag-oreilly-java-se-21-developer-1z0-830-download","dgi_tag-oreilly-java-se-21-developer-1z0-830-english","dgi_tag-oreilly-java-se-21-developer-1z0-830-free","dgi_tag-oreilly-java-se-21-developer-1z0-830-free-download","dgi_tag-simon-roberts"],"_links":{"self":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/digital_item\/9802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/digital_item"}],"about":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/types\/digital_item"}],"author":[{"embeddable":true,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":0,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/digital_item\/9802\/revisions"}],"wp:attachment":[{"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/media?parent=9802"}],"wp:term":[{"taxonomy":"dgi_category","embeddable":true,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/dgi_category?post=9802"},{"taxonomy":"dgi_tag","embeddable":true,"href":"https:\/\/nokobox.com\/index.php\/wp-json\/wp\/v2\/dgi_tag?post=9802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}