Boost Your Coding Efficiency: Install and Master JetBrains Junie in IDEA 2025

Installation and Uninstallation

Remove existing IntelliJ IDEA installations before installing Junie to avoid conflicts.

macOS

Delete the IntelliJ IDEA app from /Applications.

Remove configuration and cache directories:

~/Library/Application Support/JetBrains/IntelliJIdea2025.1

~/Library/Caches/JetBrains/IntelliJIdea2025.1

Windows

Uninstall via Settings → Apps & Features.

Delete configuration directories:

%APPDATA%\JetBrains\IntelliJIdea2025.1

%LOCALAPPDATA%\JetBrains\IntelliJIdea2025.1

Linux

Remove the installation directory.

Delete configuration and cache directories:

~/.config/JetBrains/IntelliJIdea2025.1

~/.cache/JetBrains/IntelliJIdea2025.1

~/.local/share/JetBrains/IntelliJIdea2025.1

Optionally delete desktop shortcuts.

Reinstall IntelliJ IDEA 2025.1

Download the appropriate build from the official JetBrains site:

https://www.jetbrains.com/idea/download/other.html

Install Junie and JetBrains Assistant Plugins

In the IDE plugin marketplace, search for JetBrains Junie and JetBrains Assistant and install both.

Activate Junie

Click the JetBrains icon in the top‑right corner and select Let's Go to start the free version. If you have a license, activate it; the UI shows the activation status.

Feature Overview

Junie provides AI‑assisted coding with:

Project‑wide code context understanding.

Multi‑language support (Java, Kotlin, Python, JavaScript, etc.).

Context‑aware code generation.

Code explanation and teaching.

Refactoring suggestions.

Natural‑language to code conversion.

Live learning of APIs and frameworks.

Privacy guarantee – code is not used to train models.

Front‑End Example (Vite + React + Tailwind)

Prompt used:

使用 Vite 在当前项目中，创建一个 React 登录组件，使用 Tailwind CSS 样式，需要包含邮箱验证功能和记住密码选项。

The generated component includes email validation, a “remember me” checkbox, and Tailwind styling.

A registration page with similar styling can be generated using a comparable prompt.

Back‑End Example (Spring Boot 3.4.4, Gradle, Java 21)

Prompt used:

使用 Gradle 在当前项目中，创建一个 SpringBoot 项目，要求如下：
1. 项目根包为 top.flyeric
2. Spring Boot 3.4.4，JDK 21
3. 使用 JPA，数据库 H2
4. 核心模型 Book，字段包括 id、title、author、isbn、description、price、publicationDate、publisher、pageCount、inStock、coverImageUrl、genre、language
5. MVC 分层架构

The tool generates a complete Spring Boot project with a Book entity, repository, service, and controller. CRUD APIs are created, static resources are added for a simple UI, and sample data is inserted.

Generating Project Guidelines

Junie can create a .junie/guidelines.md file containing best‑practice rules for the Spring Boot project.