Java and Kotlin, from first idea to running application.
Java, Kotlin, Spring, agents, and project navigation stay in the same IntelliJ IDEA window. 72% of Java developers work here.
See Spring from source to runtime.
IntelliJ IDEA reads your Spring beans and opens the failing line in a few clicks. The context stays visible while the app is running, not after you leave the editor.
Spring BootDebugInspections
Bring your agent into the project you already have open.
Keep the agent beside the debugger and tests, in the same window. The walkthrough stays on the file the agent is editing, not in a separate chat product.
In use at more than 300,000 organizations
Vendor pages list SOC 2 Type II and GDPR.
Official pages list SOC 2 Type II and GDPR. Checksums ship as sibling .sha256 files. Read the IntelliJ IDEA security notes before you exclude folders from a scanner.
What people using the IDE actually said
Yasuaki Kato
Software engineer at a healthcare and senior-care technology company
"We stay on IntelliJ IDEA because it is the most efficient desk for our backend work."
Jay
Backend engineer at a company building software for self-service photo studios
"Git lets me stage partial commits, compare branches, and rebase in the IDE. Class diagrams help on large trees."
Varij Kapil
Former software developer at a company building quality IT and reporting tools
"Breaking changes crossed several Java modules. That rewrite would have stalled without JetBrains refactoring."
Get the 2026.2.3 installer
Agents read the same project index you do. The Windows x64 installer is 1.11 GB. Free core, 30-day Ultimate trial.
How IntelliJ IDEA sits next to other Java tools
Rows follow 2026 Java work. Ultimate-only items are marked.
| Criterion | IntelliJ IDEA | Eclipse | VS Code | NetBeans |
|---|---|---|---|---|
| Project model | Whole-project index, inspections, refactor | JDT workspace, plugin-heavy | Editor plus Java extensions | Maven-first, all-in-one |
| Spring | First-class, deeper tools on Ultimate | Spring Tools / STS | Extension pack | Limited |
| Maven / Gradle | Built-in import, Gradle 10 preview | m2e / Buildship | Via extensions | Strong Maven |
| Debugger | Logpoints, evaluate, WSL2 fixes in 2026.2.3 | Solid JDT debug | Good via extension | Standard |
| License | Free core, Ultimate subscription | Free, Eclipse Public License | Free editor | Free, Apache |
| Typical RAM | Plan 8 GB machine, 3 GB for the IDE | Varies with plugins | Lighter process | Moderate |