Since that version is now over 7 years old, modern tutorials on "new features" won’t apply. Instead, here is useful, practical content tailored for someone who still needs to use or maintain this legacy version.
Modern IDEs (2023–2024) are notorious for consuming 4–6 GB of RAM even for small projects. IntelliJ IDEA Ultimate 201833 was the last version that ran comfortably on 8 GB total system RAM with 2 GB allocated to the IDE. jetbrains intellij idea ultimate 201833 top
Go to https://www.jetbrains.com/idea/download/other.html. Search for "2018.3.3" or "IntelliJ IDEA 2018.3.3". Choose the .tar.gz (Linux/macOS) or .exe (Windows) file. Since that version is now over 7 years
| Feature | Notes | |---------|-------| | Java 11 support | Basic support, no records/patterns | | JUnit 5 | Native support | | Spring Boot | Run dashboards, initializr | | Microservices | Basic HTTP client, Docker integration (old) | | Database Tools | SQL editor, data viewer (Ultimate) | | Version Control | Git, GitHub, SVN, Mercurial | | JavaScript/TypeScript | Older Node.js support | | Plugins | Many no longer update for 2018.3 | Performance Review: Why "Top" Refers to Speed Modern
At the time of its release, Java 12 was just rolling out. IntelliJ IDEA 2018.3.3 was one of the first IDEs to fully support Java 12 switch expressions (preview) and improved var inference. For teams migrating from Java 8 to 11 or 12, 201833 provided the most stable refactoring tools available.
idea64.vmoptions):
-Xms256m
-Xmx1024m
-XX:ReservedCodeCacheSize=240m
-XX:+UseConcMarkSweepGC (faster on single-core)
Editor > General > Code Completion > Autopopup documentationVersion Control > Commit > Check 'Do not show commit options'File > Power Save Mode) – disables background inspections.To understand why this version was "top" in its era, compare it to Eclipse 2018-12 and NetBeans 9.0:
| Feature | IntelliJ IDEA Ultimate 201833 | Eclipse 2018-12 | NetBeans 9.0 | | :--- | :--- | :--- | :--- | | Java 12 Switch Expressions | ✅ Full preview support | ❌ Required plugins | ❌ Not supported | | Spring Boot Dashboard | ✅ Native | ❌ (STS plugin required) | ⚠️ Partial | | Built-in Database Client | ✅ Yes (DataGrip) | ❌ No | ❌ No | | Microservice Run Configurations | ✅ Advanced grouping | ❌ Basic | ❌ Basic | | Memory Footprint (Medium project) | ~1.2GB | ~1.5GB | ~1.0GB |