Java Blog - Java News and Learning posts on CodeGym

Oleksandr Miadelets Random
January 7, 2026 at 9:40 PM
ChatGPT Apps: How to Order Pizza, Call a Taxi, and Book a Hotel—Without Leaving the Chat We break down 11 official integrations, show you how to connect apps in two minutes, and explain why this is a new gold rush for developers on the scale of the 2008 App Store—only 80 times bigger.
1/7/26
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Oleksandr Miadelets Random
December 22, 2025 at 12:06 PM
New CodeGym Courses 2025-2026: ChatGPT Apps, Kotlin, Go and C++4 new CodeGym courses 2025-2026: ChatGPT Apps for AI applications, Kotlin for mobile development, Go for clouds, and C++ for high salaries. ALL IN ONE — access to all.
12/22/25
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Oleksandr Miadelets Random
December 22, 2025 at 11:17 AM
ChatGPT Apps: A Complete Developer's Guide for 2025 On December 17, 2025, OpenAI opened ChatGPT Apps submissions to all developers. 800M users, <20 competitors. Complete guide: from your first app to Store publication. NestJS + MCP + code examples.
12/22/25
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Oleksandr Miadelets Random
December 3, 2025 at 11:42 AM
How AI Understands Your Words: From Tokens to Response Ever wondered how ChatGPT understands you? Learn how AI processes text: from tokens to transformers, attention mechanisms to responses. Beginner-friendly guide with real examples.
12/3/25
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Oleksandr Miadelets Random
December 3, 2025 at 11:18 AM
C# (C-Sharp) — A Language You Can Actually Make Real Money With Complete C# guide for 2026: salary ranges ($70-180K), job market analysis, C# vs Java/Python comparison, and free learning resources. Start your C# career today.
12/3/25
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Oleksandr Miadelets Random
November 5, 2025 at 10:13 PM
Top Python Courses in 2025: How to Choose Without Regrets You know what's happening right now, as you're reading these words? Somewhere in the world, another person just landed a job as a Python developer. Starting at $30,000 a year for a junior in Eastern Europe or $70,000 in the US.
11/5/25
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Oleksandr Miadelets Random
November 5, 2025 at 9:01 PM
Why AI Won't Replace Programmers (And Why Now Is the Best Time to Start Learning)I open LinkedIn — and there's another post: "AI writes code better than humans, the programming profession is dying." I check Twitter — same story. YouTube — experts predicting the end of the developer era.
11/5/25
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Oleksandr Miadelets Random
October 22, 2025 at 12:16 PM
Anthropic Introduced the Best Coding Model — Claude Sonnet 4.5 On September 29, 2025, Anthropic released Claude Sonnet 4.5. It's a new AI model for programming, and it's really good. I've been testing it for several weeks myself, and the results surprised me.
10/22/25
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Oleksandr Miadelets Random
October 21, 2025 at 2:18 PM
Top 6 books about Java for beginners [2025]We're accustomed to being able to quickly access and absorb information. We prefer five-minute videos to lengthy lectures and short articles to books. I won't say that a good programming book replaces every article — that's not the case. And it certainly doesn't replace practice. However, for me personally...
10/21/25
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Oleksandr Miadelets Random
October 8, 2025 at 2:28 PM
IntelliJ IDEA 2025.2: When Your IDE Becomes Your Best Friend Hey fellow coders! Remember that moment when you first opened IntelliJ IDEA and thought, "How did I ever live without this?" Well, get ready to experience that feeling all over again. IntelliJ IDEA 2025.2 isn't just another update.
10/8/25
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Oleksandr Miadelets Random
October 2, 2025 at 7:42 PM
GitHub Copilot: How to Become a Cyborg Programmer and Profit from the AI Revolution Remember when calculators killed the bookkeeper profession? Or when Excel wiped out armies of accountants? No? That's right, because it never happened. Instead, financial analysts emerged, earning multiples of what old-school bookkeepers made.
10/2/25
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Oleksandr Miadelets Random
September 23, 2025 at 6:33 PM
Java 25: What's New and Where to Learn It Hands-On Java 25 was released on September 16, 2025 — the first Long-Term Support release after Java 21. Over 15 years of working with Java, I've trained dozens of people to become programmers, and now with my team, we create courses for millions of students.
9/23/25
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