The Cooperative Multitasking Trap: Why Asynchronous Loops Starve Mobile Runtimes

Kotlin Comes to BlueJ

BlueJ 6.0 tích hợp hỗ trợ Kotlin, cung cấp cú pháp ngắn gọn, an toàn null và phân biệt val/var nhằm đơn giản hóa lập trình OOP cho sinh viên. JetBrains cũng cung cấp tài liệu hướng dẫn và giáo án dành cho giảng viên.

Lập trình viên học lập trình cơ sở hoặc chuyển đổi sang Kotlin từ Java sẽ tìm hiểu cách BlueJ 6.0 tích hợp Kotlin giúp giảm thiểu công việc lặp lại và làm sáng tỏ cách ngôn ngữ này tối ưu hóa OOP với tính năng null safety và syntax ngắn gọn.

jetc.dev Newsletter Issue #319

Bản tin jetc.dev số 319 cập nhật các phiên bản mới nhất của Jetpack Compose gồm bản vá 1.11.3, beta 1.12 đầu tiên và Compose Multiplatform 1.12.0-alpha02. Nội dung nổi bật bao gồm hỗ trợ iOS cho Jetpack Ink, các BOM mới, lifecycle/viewmodel-compose 2.11.0 mở rộng đa nền tảng, thư viện locationbutton Compose mới, cùng nhiều chủ đề như scoping ViewModel, Coil 3 cho tải ảnh đa nền tảng, kiểm thử screenshot theo locale, và các thư viện mã nguồn mở mới.

Những tiến bộ mới trong Jetpack Compose và Compose Multiplatform từ phiên bản 1.12 beta sẽ giúp bạn tối ưu hóa ứng dụng Android/iOS/native với các tính năng mới như ink iOS, viewmodel scoping và Coil 3, từ đó nâng cao hiệu suất và tính đa nền tảng cho dự án.

IntelliJ IDEA 2026.1.4 Is Out!

IntelliJ IDEA 2026.1.4 is a patch release with four bug fixes: correct active Git branch updates, a fix for PHP interpreter creation failing when pull_policy is used in Docker Compose files, a fix for Gradle 9.5.0 syncs on WSL being incorrectly shown as failed, and a fix for Dev Container connections failing with an 'Unknown Docker endpoint schema' error. The update is available via the IDE itself, Toolbox App, snaps, or direct download.

Learning faster with Antigravity

A Flutter developer describes how they used Antigravity (Google's AI coding assistant) and a structured iterative workflow to build a Flutter frontend for a Python-based ADK (Agent Development Kit) agent — a language and framework they had no prior experience with. The approach involved creating a reusable 'skill' (a set of reference docs and instructions) that guided an AI 'coder' agent through phases: analyzing the backend agent, writing usage/architecture/design specs, and generating code. A separate 'author' agent helped evaluate output and refine the skill after each of 13 iterations. The post walks through specific bugs fixed along the way — network permissions, markdown rendering, SSE partial event aggregation, and more — and shares the resulting skill on GitHub.

Building a 3D Game in React Native + Kotlin Multiplatform

A developer rebuilt a 3D chess game using React Native as the UI shell while keeping all game logic in Kotlin Multiplatform compiled to JavaScript via Kotlin/JS. The architecture separates concerns strictly: chess rules, FEN handling, UCI integration, scene math, camera, and raycasting all live in a single Kotlin module compiled once to JS and shared across iOS, Android, web, and desktop. Two renderers are used — React Native Filament for mobile and Three.js for web/desktop — both consuming the same Kotlin Board3DScene model. Stockfish is the deliberate native exception, running as a TurboModule on Android for compute-intensive chess search. The key insight is that Kotlin's type safety guarantees (null safety, exhaustive when expressions, sealed types) survive into the emitted JS, making it preferable to TypeScript for correctness-critical game logic.

Kotlin improves compile-time constants

Kotlin 2.4.0 introduces experimental improvements to compile-time constants, adding support for unsigned type operations, standard library string functions like .lowercase(), .uppercase(), and .trim(), and evaluation of enum constant .name properties. A new IntrinsicConstEvaluation annotation clarifies which functions are evaluated at compile time. The release also improves JavaScript and TypeScript export (including value classes and ES2015 features), enables Java 26 bytecode generation, adds experimental WebAssembly Component Model support, and ships bundled in IntelliJ IDEA and Android Studio. Additionally, Kotlin 2.4.20 Beta1 introduces the StackTraceRecoverable interface for better coroutines integration and a build tools API supporting Kotlin/JS, Kotlin/Wasm, and Kotlin metadata targets.

Kotlin DSL Deep Dive: From Gradle Scripts to Building Your Own

A comprehensive guide to Kotlin DSLs covering what they are, how they work, and how to build one from scratch. Explains the five Kotlin language features that enable DSLs — trailing lambdas, extension functions, infix functions, operator overloading, and lambdas with receivers. Demystifies .kts files and Gradle's build.gradle.kts by showing that dependencies {} is just a function call with a trailing lambda and an implicit Project receiver. Walks through building a working HTML builder DSL step by step, including the @DslMarker annotation for enforcing grammar rules. Concludes with practical guidance on when DSLs are worth building.