#java21 — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #java21, aggregated by home.social.
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📬 Stay tuned:If you don’t want to miss the upcoming parts of this Java 21 Certification series
Read more 👉 https://lttr.ai/AqKqz
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My previous certification was for Java 8, and it took me about two months to prepare. For Java 21 it was very different.
Read more 👉 https://lttr.ai/AqKqq
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To make things practical, we’ll analyze a question in the style of the certification exam.
Read more 👉 https://lttr.ai/AqKqV
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👉 Have you already taken the Java 21 certification?
Read more 👉 https://lttr.ai/AqCXs
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👉 Have you already taken the Java 21 certification?
Read more 👉 https://lttr.ai/AqCXs
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Welcome to the second article in my series on preparing for the Java 21 certification
Read more 👉 https://lttr.ai/Ardfy
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Welcome to the second article in my series on preparing for the Java 21 certification
Read more 👉 https://lttr.ai/Ardfy
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📬 Stay tuned:If you don’t want to miss the upcoming parts of this Java 21 Certification series
Read more 👉 https://lttr.ai/AqCXk
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📬 Stay tuned:If you don’t want to miss the upcoming parts of this Java 21 Certification series
Read more 👉 https://lttr.ai/AqCXk
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In this series, I’ll share practical tips to help you understand the new features of Java 21 and get ready to pass the certification exam with confidence.
Read more 👉 https://lttr.ai/Ama8v
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In this series, I’ll share practical tips to help you understand the new features of Java 21 and get ready to pass the certification exam with confidence.
Read more 👉 https://lttr.ai/Ama8v
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Welcome to the fifth article in my series on preparing for the Java 21 certification.
Read more 👉 https://lttr.ai/AqCXY
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Welcome to the fifth article in my series on preparing for the Java 21 certification.
Read more 👉 https://lttr.ai/AqCXY
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These operations have existed since Java 1.4; however, we don't use them every day, so it can be a little hard.
Read more 👉 https://lttr.ai/Ama8p
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These operations have existed since Java 1.4; however, we don't use them every day, so it can be a little hard.
Read more 👉 https://lttr.ai/Ama8p
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These concepts aren’t something most developers use in their daily work, so they can feel a bit tricky.
Read more 👉 https://lttr.ai/AprKK
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These concepts aren’t something most developers use in their daily work, so they can feel a bit tricky.
Read more 👉 https://lttr.ai/AprKK
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In this series, I’ll share practical tips to help you understand the new features of Java 21 and get ready to pass the certification exam with confidence.
Read more 👉 https://lttr.ai/AphQr
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In this series, I’ll share practical tips to help you understand the new features of Java 21 and get ready to pass the certification exam with confidence.
Read more 👉 https://lttr.ai/AphQr
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True or False: An unnamed module includes all the classes on the classpath that are not part of any named module ?
Read more 👉 https://lttr.ai/ApVIv
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True or False: An unnamed module includes all the classes on the classpath that are not part of any named module ?
Read more 👉 https://lttr.ai/ApVIv
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In this article, we’ll focus on Serializable and IO operations.
Read more 👉 https://lttr.ai/ApIrg
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In this article, we’ll focus on Serializable and IO operations.
Read more 👉 https://lttr.ai/ApIrg
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In this article, we’ll focus on bitwise operations and binary number representation.
Read more 👉 https://lttr.ai/Ama8Q
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In this article, we’ll focus on bitwise operations and binary number representation.
Read more 👉 https://lttr.ai/Ama8Q
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How I was able to finish in about 90 minutes and scored 82%.
Read more 👉 https://lttr.ai/AoufB
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How I was able to finish in about 90 minutes and scored 82%.
Read more 👉 https://lttr.ai/AoufB
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Java 21 Certification Guide - Part 6
▸ https://lttr.ai/Aome2 -
Java 21 Certification Guide - Part 6
▸ https://lttr.ai/Aome2 -
In this article, we’ll focus on switch expressions, utilizing pattern matching for switches and enums.
Read more 👉 https://lttr.ai/AodEW
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In this article, we’ll focus on switch expressions, utilizing pattern matching for switches and enums.
Read more 👉 https://lttr.ai/AodEW
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Eclipse GlassFish 8 is Released
https://techlife.blog/posts/glassfish-8-release/#JakartaEE #GlassFish #EnterpriseJava #OmniFish #Java21 #Java
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Java 21 Certification Guide - Part 6
Read more 👉 https://lttr.ai/Ama70
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Java 21 Certification Guide - Part 6
Read more 👉 https://lttr.ai/Ama70
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Java 21 Certification Guide - Part 4
▸ https://lttr.ai/Ama7s -
Java 21 Certification Guide - Part 4
▸ https://lttr.ai/Ama7s -
To make things practical, we’ll analyze a question in the style of the certification exam.
Read more 👉 https://lttr.ai/An9r8
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To make things practical, we’ll analyze a question in the style of the certification exam.
Read more 👉 https://lttr.ai/An9r8
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For years we accepted a trade-off: Python for scripts, Java for systems.
With JBang and Java 21, that trade-off is gone.
You can now write single-file Java scripts with near-zero friction and promote them to production without a rewrite.
Hands-on examples: HTTP servers, CLIs, async clients, matrix math.
https://www.the-main-thread.com/p/java-is-the-new-python-jbang-java-21
#Java #JBang #Java21 #DevExperience #SoftwareEngineering #JVM
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For years we accepted a trade-off: Python for scripts, Java for systems.
With JBang and Java 21, that trade-off is gone.
You can now write single-file Java scripts with near-zero friction and promote them to production without a rewrite.
Hands-on examples: HTTP servers, CLIs, async clients, matrix math.
https://www.the-main-thread.com/p/java-is-the-new-python-jbang-java-21
#Java #JBang #Java21 #DevExperience #SoftwareEngineering #JVM
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True or False: A named module can read from the unnamed module only if the requires directive is present?
Read the full article: Java 21 Certification Guide - Part 6
▸ https://lttr.ai/An2Fq -
True or False: A named module can read from the unnamed module only if the requires directive is present?
Read the full article: Java 21 Certification Guide - Part 6
▸ https://lttr.ai/An2Fq -
Создаем Telegram-бота для отслеживания погоды за 5 минут с помощью Nyagram (а не очередного PizzaBot)
В большинстве туториалов по Java-ботам нам предлагают написать EchoBot или магазин пиццы на огромных switch-case конструкциях. Но в 2026 году, когда у нас есть Java 21 и Spring Boot 3 , писать бойлерплейт — это преступление против продуктивности. Сегодня мы напишем WeatherBot — полезного бота, который показывает реальную погоду через API OpenWeatherMap, имеет кнопку обновления "на лету" и, используя FSM (Машину состояний) с валидацией данных, позволяет настроить ежедневную рассылку прогноза.
https://habr.com/ru/articles/991414/
#telegram #java #telegrambot #github #java21 #spring_boot #spring_mvc #боты #tutorial #программирование
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True or False: An unnamed module includes all the classes on the classpath that are not part of any named module ?
Read the full article: Java 21 Certification Guide - Part 6
▸ https://lttr.ai/Ama5C -
True or False: An unnamed module includes all the classes on the classpath that are not part of any named module ?
Read the full article: Java 21 Certification Guide - Part 6
▸ https://lttr.ai/Ama5C -
The Java SE 21 certification is currently the latest available exam, and let me tell you: it’s tough, but not impossible.
Read more 👉 https://lttr.ai/Ama49
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The Java SE 21 certification is currently the latest available exam, and let me tell you: it’s tough, but not impossible.
Read more 👉 https://lttr.ai/Ama49
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In this article, we’ll focus on bitwise operations and binary number representation.
Read more 👉 https://lttr.ai/Ama47
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In this article, we’ll focus on bitwise operations and binary number representation.
Read more 👉 https://lttr.ai/Ama47
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In this article, we’ll focus on modules, introduced on Java 9.
Read more 👉 https://lttr.ai/AnXPL
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In this article, we’ll focus on modules, introduced on Java 9.
Read more 👉 https://lttr.ai/AnXPL
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The goal here is to expose you to several tricky details that often show up in the Java 21 certification exam.
Read more 👉 https://lttr.ai/AnUj1
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Java 21 Certification Guide - Part 5
▸ https://lttr.ai/Ama4x