Java Blog - Java News and Learning posts on CodeGym

Oleksandr Miadelets Random
April 6, 2026 at 10:38 AM
Who Is a C++ Developer: What They Do, How Much They Earn, and How to Get Started A C++ developer isn't the person building your app's UI — they're the person who built the engine the UI runs on. Game engines, trading systems, medical firmware. Here's what the job actually looks like, what it pays across different markets, and how to get there from zero.
4/6/26
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Oleksandr Miadelets Random
April 6, 2026 at 10:34 AM
C++: What It Is, Where It's Used, and Whether It's Worth Learning in 2026 Every year someone declares C++ dead. Every year C++ quietly keeps running your browser, your GPU, and half the internet. Here's what the language actually is, where it's used in 2026, and whether it makes sense to learn it — honest answer, no hype.
4/6/26
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Oleksandr Miadelets Random
March 20, 2026 at 8:07 PM
Java vs Kotlin: An Honest Comparison Java vs Kotlin — an honest comparison of syntax, null-safety, coroutines, and interoperability. Where Java wins, where Kotlin is the better fit.
3/20/26
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Oleksandr Miadelets Random
March 20, 2026 at 7:59 PM
Kotlin from Scratch: Tutorial for Beginners A Kotlin tutorial for beginners: setup, syntax, null-safety, data classes, extension functions — with working code examples.
3/20/26
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Oleksandr Miadelets Random
March 20, 2026 at 7:57 PM
What Is Kotlin and Why Developers Are Adding It to Their Resumes Kotlin is JetBrains' language and the official choice for Android. What it is, why it's worth learning, and why more and more job listings are asking for it.
3/20/26
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Oleksandr Miadelets Random
February 19, 2026 at 9:47 PM
Why Is Everyone So Obsessed With Python?Ready for you to swap in the final image URLs. Once done, say which languages you need and I'll localize them all.
2/19/26
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Oleksandr Miadelets Random
February 18, 2026 at 10:44 PM
Python Developer Roadmap: From Your First Line of Code to Professional Developer Learn how to become a Python developer from scratch — step-by-step roadmap from your first "Hello, World!" to landing your first job. Real timelines, salary data, portfolio tips, and common mistakes to avoid.
2/18/26
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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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