What’s New in IntelliJ IDEA 2023.3? Java 21 Support and AI Assistant Update
JetBrains' IntelliJ IDEA 2023.3 release brings full Java 21 support, a new Run‑to‑Cursor debugging option, floating editing toolbars, color‑coded editor tabs, refreshed macOS icons, enhanced Speed Search shortcuts, and integrates Lets‑Plot for no‑code data visualization, though the AI Assistant remains unavailable in mainland China.
JetBrains has launched the IntelliJ IDEA 2023.3 official version, introducing many optimizations and the long‑awaited AI Assistant plugin, which is currently unavailable in mainland China due to OpenAI restrictions.
Feature Highlights
Full Java 21 Support
IntelliJ IDEA 2023.3 provides complete support for the latest Java 21 features, including virtual threads, record patterns, pattern‑matching for switch expressions, serialized collections, string templates, and preview of scoped values.
Run to Cursor in Debugger
The new Run to Cursor embedded option lets you execute to a specific line during debugging by hovering over the line and clicking the popup, or by pressing the shortcut ⌥F9.
Floating Toolbar with Editing Actions
A floating toolbar appears next to the selected code, offering quick access to Extract, Surround, Reformat, Comment and other context actions. It can be customized or hidden via Settings → Advanced Settings → Editor.
Default Color‑Coded Editor Tabs
Editor tabs now have default color coding that reflects their appearance in the Project tool window, configurable in Settings → Appearance & Behavior → File Colors.
New macOS Product Icon
The IntelliJ IDEA icon for macOS has been redesigned to align with the operating system’s standard style guidelines.
Speed Search Shortcut
A new shortcut for Speed Search has been added.
Other Optimizations
Additional improvements for Java, Scala, Kotlin and other languages.
Database Tools
Data Visualization Ultimate
IntelliJ IDEA Ultimate 2023.3 integrates the Lets‑Plot library, enabling simplified no‑code data visualization.
For more details, visit the official “What’s New” page.
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Programmer DD
A tinkering programmer and author of "Spring Cloud Microservices in Action"
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