Best AI IDEs for Java

JetBrains Junie is an innovative AI coding assistant that works inside many JetBrains IDEs to streamline programming efforts and boost efficiency. This agent leverages advanced AI to help developers write, test, and inspect code without leaving their familiar development environment. Junie offers both code execution and interactive collaboration, allowing programmers to switch between automated code writing and brainstorming sessions for features and improvements. By deeply understanding the codebase, Junie identifies the best ways to tackle tasks and ensures all changes meet quality standards through syntax and semantic checks. It also runs tests to minimize errors and keep the project healthy, freeing developers from routine tasks. Many developers have successfully built complex applications and games using Junie, highlighting its flexibility across different languages and frameworks. The AI adapts to each task’s complexity and workflow, making coding less tedious and more focused on creativity. Whether you are building a simple web app or a complex game, Junie offers smart support throughout the development cycle.

Windsurf is a cutting-edge IDE designed for developers to maintain focus and productivity through AI-driven assistance. At the heart of the platform is Cascade, an intelligent agent that not only fixes bugs and errors but also anticipates potential issues before they arise. With built-in features for real-time code previews, automatic linting, and seamless integrations with popular tools like GitHub and Slack, Windsurf streamlines the development process. Developers can also benefit from memory tracking, which helps Cascade recall past work, and smart suggestions that enhance code optimization. Windsurf’s unique capabilities ensure that developers can work faster and smarter, reducing onboarding time and accelerating project delivery.

Visual Studio Code is a highly extensible AI-powered code editor built for developers who demand flexibility and performance. It combines intelligent coding assistance, modern debugging tools, and collaboration features in one lightweight package. With Agent Mode, VS Code reads your codebase, runs terminal commands, and edits across files automatically until tasks are complete. Its Next Edit Suggestions feature predicts and completes your next move as you type, enhancing speed and code accuracy. The Model Context Protocol (MCP) enables developers to connect their favorite AI models—from OpenAI, Anthropic, Azure, or Google—and extend functionality through custom servers. Developers can work in any language, from JavaScript and Python to C#, Java, and Go, while leveraging over 75,000 extensions for added productivity. Seamless integration with GitHub Codespaces, cloud storage, and CI/CD tools allows teams to code, collaborate, and deploy anywhere. Open-source at its core, VS Code empowers both individuals and enterprises to innovate without limits.

IntelliJ IDEA is a powerful and versatile IDE tailored for professional Java and Kotlin developers who want to maximize their productivity and code quality. It provides comprehensive support across the entire development process, including design, coding, debugging, testing, and deployment. With smart code analysis, safe refactoring, and error detection, IntelliJ IDEA minimizes bugs and technical debt so developers can focus on innovation. The latest version adds full support for Java 24 features and enables Kotlin’s K2 mode by default, improving performance and memory efficiency. New interactive Kotlin notebooks allow real-time prototyping and data visualization within the IDE. IntelliJ IDEA also includes advanced debugging tools like the Spring Debugger for managing dynamic database connections. JetBrains prioritizes developer comfort with an intuitive interface and customizable settings. The IDE adheres to strict privacy and security standards, ensuring developers’ data remains protected.

Introducing the Lightning-Smart PHP IDE, PhpStorm, which has a profound comprehension of your code. Tailored for frameworks like Symfony, Laravel, Drupal, WordPress, Zend Framework, Magento, Joomla!, CakePHP, Yii, and more, PhpStorm truly grasps the intricacies of your code structure. It accommodates all PHP language features, making it an ideal choice for both modern and legacy projects. With PhpStorm, you benefit from unparalleled code completion, advanced refactorings, and proactive error prevention. Additionally, it seamlessly integrates cutting-edge front-end technologies such as HTML 5, CSS, Sass, Less, Stylus, CoffeeScript, TypeScript, Emmet, and JavaScript, offering robust refactoring, debugging, and unit testing functionalities. The Live Edit feature allows you to see changes in real-time within the browser, enhancing your development experience. Moreover, you can efficiently execute various routine tasks directly from the IDE, thanks to its integration with Version Control Systems, support for remote deployments, databases/SQL, command-line tools, Docker, Composer, REST Client, and an array of other essential tools, thus streamlining your workflow. Ultimately, PhpStorm empowers developers to work more efficiently and effectively across multiple platforms and technologies.

Utilize our complimentary, collaborative IDE that operates in your browser to write code in over 50 programming languages—no setup time required. Begin coding in your preferred language across any device, operating system, or platform. You can easily invite friends, team members, and colleagues to collaborate in real-time, similar to Google Docs editing. Seamlessly import, execute, and work together on countless GitHub repositories without any manual configurations. Whether you’re interested in Python, C++, HTML, or CSS, our platform allows you to learn and code in whatever language you choose, all in one place. The moment you create a new repl, it becomes live and shareable instantly with others around the globe. Join a community of over 3 million enthusiastic programmers, technologists, creatives, and learners eager to enhance their coding skills. Boost your team's efficiency with dynamic documentation, real-time collaboration features, and effortless remote interviewing options. Additionally, you can build applications programmatically, develop bots, and tailor the IDE with plugins to meet your specific requirements, ensuring a personalized coding experience. This all-in-one platform is designed to make coding more accessible and engaging for everyone.

Project Jupyter is dedicated to the creation of open-source tools, standards, and services that facilitate interactive computing in numerous programming languages. At the heart of this initiative is JupyterLab, a web-based interactive development environment designed for Jupyter notebooks, coding, and data manipulation. JupyterLab offers remarkable flexibility, allowing users to customize and organize the interface to cater to various workflows in fields such as data science, scientific research, and machine learning. Its extensibility and modular nature enable developers to create plugins that introduce new features and seamlessly integrate with existing components. The Jupyter Notebook serves as an open-source web application enabling users to produce and share documents that incorporate live code, mathematical equations, visualizations, and descriptive text. Common applications of Jupyter include data cleaning and transformation, numerical simulations, statistical analysis, data visualization, and machine learning, among others. Supporting over 40 programming languages—including popular ones like Python, R, Julia, and Scala—Jupyter continues to be a valuable resource for researchers and developers alike, fostering collaborative and innovative approaches to computing challenges.

JetBrains Rider is a robust and efficient cross-platform IDE for .NET development, allowing users to create applications for .NET, ASP.NET, .NET Core, Xamarin, and Unity across Windows, Mac, and Linux operating systems. Built on the IntelliJ platform and enhanced by ReSharper, Rider offers compatibility with .NET Framework, cross-platform .NET Core, and Mono projects. This versatility enables developers to build a diverse array of applications, from desktop software and web services to Unity games and mobile apps. Rider boasts over 2200 live code inspections along with numerous context actions and refactorings, seamlessly integrating ReSharper's capabilities with the comprehensive features of the IntelliJ platform. With its extensive functionality, Rider maintains a focus on speed and responsiveness, ensuring a smooth development experience. Additionally, it supports running and debugging across various runtimes while being fully operational on multiple operating systems. Moreover, Rider incorporates more than 60 refactorings from ReSharper and offers a wide selection of over 450 context actions, enhancing productivity further.

Leverage the language-specific syntax and error highlighting, along with features like code formatting, completion, and instant documentation to enhance your coding experience. Utilize intelligent search to swiftly navigate to any class, file, symbol, or even specific IDE actions and tool windows. With just one click, you can access declarations, super methods, tests, usages, implementations, and more. Experience incredibly fast navigation within your Rails project, supported by an MVC-based project view, as well as diagrams illustrating model, class, and gem dependencies. Adhere to community best practices through code inspections that validate your code for various potential issues, offering immediate improvements via quick-fix options. Automated refactorings ensure that your code remains clean and maintainable, while Rails-aware features facilitate project-wide modifications: for instance, renaming a controller will automatically adjust the corresponding helper, views, and tests. This comprehensive set of tools allows for a more efficient workflow, enabling developers to focus on building robust applications without getting bogged down by mundane tasks.

Ona, the evolution of Gitpod, is built to help teams move beyond traditional IDEs by serving as a central hub for modern software engineering. Its sandboxed environments run with full OS-level isolation, giving developers secure and consistent setups whether hosted in the cloud or on private infrastructure. With Ona Agents, teams can automate repetitive tasks, accelerate handoffs, parallelize work, and receive real-time support across scoping, coding, reviewing, and documentation. The platform ensures that developers can seamlessly switch between agent conversations, browser-based VS Code Web, or desktop IDEs without losing productivity. Enterprise-level guardrails reinforce compliance by offering detailed audit trails, network controls, and fine-grained organizational policies. Ona is already trusted by global enterprises in industries like banking and pharmaceuticals, highlighting its reliability at scale. Integrations with GitHub, GitLab, Redis, MongoDB, and AWS make it easy to connect existing workflows without disruption. With SOC 2 certification, GDPR compliance, and WCAGAA accessibility standards, Ona sets the standard for secure and inclusive developer productivity.

Fine is an innovative platform driven by artificial intelligence, aimed at supporting startups by automating various tasks in the software development lifecycle. This platform provides a variety of AI agent workflows that facilitate coding, debugging, testing, and code review, enabling teams to release daily updates and expedite the resolution of pull requests. Fine has the capability to independently generate and apply code, perform pull request assessments, create tests, and manage typical challenges without the need for constant oversight from human developers. It integrates smoothly with GitHub and is designed to accommodate asynchronous collaboration, making it an ideal choice for dynamic startup environments. Additionally, Fine offers real-time feedback and live previews, which not only enhance productivity but also optimize the overall development workflow. By leveraging such advanced features, teams can focus more on strategic tasks while the platform handles routine operations efficiently.

Introducing MarsCode: an advanced AI development tool designed for immediate use. This innovative platform features an 'out-of-the-box cloud AI IDE' and a 'robust AI assistant,' making it an essential resource for developers seeking to enhance their learning and streamline their workflow. Among its standout features are: 1. A cloud-based AI IDE that frees developers from the limitations of specific devices and locations. 2. Integration options for local IDEs, which infuse traditional development practices with cutting-edge AI capabilities. 3. A suite of tools for code completion, bug fixing, and optimization, offering intelligent support throughout the entire coding journey. 4. An intelligent Q&A feature at the repository level, enabling developers to concentrate on their tasks with greater ease. 5. Versatile deployment support for various types of applications, including websites, AI plugins, and APIs, catering to a broad range of development needs. With MarsCode, developers not only gain access to powerful tools but also experience a newfound level of productivity and efficiency in their projects.

Aqua stands out as the pioneering integrated development environment (IDE) designed exclusively for test automation. This comprehensive workspace seamlessly accommodates Selenium, Cypress, and Playwright, providing a versatile environment for users. As a polyglot IDE, Aqua is proficient in several programming languages, including Java, Python, JavaScript, TypeScript, Kotlin, and SQL. It streamlines the testing process by eliminating the need for extensive plugin installations and configurations. What truly sets Aqua apart is its distinctive feature set, which caters to all the daily requirements of a test automation engineer. The integrated Web Inspector functions akin to an embedded browser, enabling users to effortlessly capture any page element without the need to switch to other applications. Additionally, Aqua offers an HTTP client for API testing, along with seamless integration with databases, Docker, and version control systems. By alleviating the complexities of even the most demanding tasks, Aqua significantly enhances the user experience. The synergy of intelligent code analysis, robust search and refactoring tools, along with its user-friendly design, empowers users to maximize their productivity in quality engineering endeavors. Ultimately, Aqua represents a transformative tool that redefines the landscape of test automation development.

Kiro is an advanced integrated development environment powered by artificial intelligence, designed to streamline AI-driven programming by transforming natural-language instructions into structured requirements, system architectures, and specific implementation tasks that undergo thorough testing. Created specifically for autonomous workflows, it offers features such as specification-based development, multimodal communication, and "agent hooks" that activate background tasks during events like file saving, alongside an autopilot mode that takes charge of executing lengthy scripts while keeping the user engaged. By effectively managing context, Kiro minimizes repetitive tasks and simplifies the integration of complex functionalities within extensive codebases. Its built-in integrations with MCP allow seamless connections to documentation, databases, and APIs, and users can influence the development process using visual aids like UI designs or architecture blueprints. With a strong focus on enterprise-level security and privacy, Kiro guarantees safe deployment, while compatibility with Claude Sonnet models, Open VSX plugins, and existing VS Code configurations ensures an intuitive and AI-enhanced experience. Additionally, the platform continuously evolves, adapting to user feedback and emerging technologies to maintain its position at the forefront of software development tools.

Void is a fork of VS Code that serves as an open-source AI code editor and an alternative to Cursor, designed to give developers enhanced AI support while ensuring complete data control. It facilitates smooth integration with various large language models, including DeepSeek, Llama, Qwen, Gemini, Claude, and Grok, allowing direct connections without relying on a private backend. Among its core functionalities are tab-triggered autocomplete, an inline quick edit feature, and a dynamic AI chat interface that supports standard chat, a restricted gather mode for read/search-only tasks, and an agent mode that automates operations involving files, folders, terminal commands, and MCP tools. Furthermore, Void provides exceptional performance capabilities, including rapid file application for documents containing thousands of lines, comprehensive checkpoint management for model updates, native tool execution, and the detection of lint errors. Developers can effortlessly migrate their themes, keybindings, and settings from VS Code with a single click and choose to host models either locally or in the cloud. This unique combination of features makes Void an attractive option for developers seeking powerful coding tools while maintaining data sovereignty.

Qoder is a sophisticated coding platform designed specifically for genuine software development, surpassing standard code completion by integrating advanced context engineering with intelligent AI agents that possess a profound understanding of your project. It enables developers to assign intricate, asynchronous tasks via its Quest Mode, wherein agents operate independently to provide complete results, while also allowing for enhanced functionality through Model Context Protocol (MCP) integrations that connect with various external tools and services. Additionally, Qoder’s Memory system captures coding style, project-specific insights, and reusable context to guarantee consistent, project-aware outputs throughout the development process. Developers can engage in chat for advice or code recommendations, maintain a Repo Wiki for consolidating knowledge, and exercise control over behavior through Rules to ensure that AI-generated work remains secure and guided. This combination of context-sensitive automation, agent delegation, and customizable AI behavior not only empowers teams to think more critically and code more effectively but also fosters an environment where innovation and collaboration can thrive. Through these features, Qoder revolutionizes the coding experience, making it more efficient and aligned with the specific needs of each project.

Eclipse Theia allows you to create multi-language Cloud & Desktop IDEs using state-of-the art web technologies. Are you unsure whether you need a desktop or web version? Theia allows you to create one IDE and have it run in browsers or native desktop applications from a single source. The Eclipse Foundation hosts the Theia project. It is a non-profit corporation and is developed by a diverse group. Projects hosted at an Open-Source Foundation, unlike other open-source projects, are protected from single-vendor decisions that would be detrimental to the interests of the diverse community. Theia is modularly designed to allow users and extenders to customize and extend every aspect of the system. It is easy to create a custom IDE-like product by simply listing all required extensions in a package.json. It is simple to add new functionality by implementing your extensions. This gives you all the flexibility that you need.

Developed entirely from the ground up, JetBrains Fleet draws on two decades of experience in creating integrated development environments (IDEs). It utilizes the robust IntelliJ code-processing engine, featuring a distributed architecture and a fresh user interface designed for modern developers. Our aim with Fleet was to create a swift and efficient text editor that allows for quick code browsing and editing. It launches almost instantaneously, enabling you to start your work without delay, and has the capability to seamlessly evolve into a full-fledged IDE, with the IntelliJ engine operating independently from the editing interface. Fleet encompasses all the beloved features of IntelliJ-based IDEs, such as code completion tailored to your project context, easy navigation to definitions and usages, real-time code quality assessments, and convenient quick-fixes. The architecture of Fleet is thoughtfully designed to accommodate various configurations and workflows, allowing it to run locally on your machine or to offload some processes to the cloud, showcasing its versatility and adaptability for different development needs. This flexibility ensures that developers can choose the setup that best fits their workflow requirements.