G1Joshi IntelliJ IDEA
IntelliJ IDEA is the premier IDE for Java and Kotlin. v2025.1 introduces Java 24 support, K2 Mode (Beta/Stable), and a unified AI Assistant.
When to Use
- Java/Kotlin: Unbeatable refactoring and static analysis.
- Spring Boot: Deep understanding of Spring beans and endpoints.
- Large Monorepos: Indexing is smarter and incremental.
Core Concepts
Indexing
IntelliJ builds a massive index of your code. This enables "Find Usages" to be instant and 100% accurate.
Intentions (Alt+Enter)
The magic key. Fixes warnings, optimizes imports, converts Java to Kotlin.
Run Configurations
Powerful system to launch apps, tests, and docker containers.
Best Practices (2025)
Do:
- Enable K2 Mode: If using Kotlin, the new frontend compiler is much faster.
- Use "Search Everywhere": Double-shift (
Shift-Shift) finds files, classes, actions, and settings. - Share Run Configs: Check
.run/configurations into Git so the team shares launch setups.
Don't:
- Don't disable indexing: Let it finish. The IDE is dumb without it.