IntelliJ IDEA is a polyglot IDE that supports development in languages like Java, Python, PHP, and JavaScript. It uses a modular plugin architecture and services like PicoContainer to provide features like code inspections, intentions, templates, and support for build tools and version control. It also integrates with tools like TeamCity and YouTrack for project management. Plugins extend its capabilities to support additional languages, diagrams, workspaces, and more.

1. IntelliJ IDEA Practice
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2. Overview
Friendly & Smart
Polyglot Language: Ruby, Python, PHP,
Objective-C, JavaScript
Community
IntelliJ IDEA Geeks
TeamCity & Youtrack

3. PicoContainer
Structure
Service Facade
Application, Project, Module component
Module Facet
AST -> PSI
Editor <-> Document
Plugin

4. Common
File Template
Live Template
Inspection
Intention Action
Custom File Type
IntelliLang

5. Project Management
maven, ant, gradle
git
markdown
bash support

6. Java & Groovy
@NotNull & @Nullable
Error Code: Resource Bundle Support
GDSL: Groovy DSL Support
Load resource from classpath

7. Web
Language Combined
Emmet
handlebars
Php

8. plugins
plantuml
workspaces
regex

9. jenv

10. jenv