Page 2 | Best AI Code Generators for Java

Programming Helper

Generate a function just by describing what is needs to do. Choose of many programming languages. More than just a code generator. A tool that helps you with a wide range of tasks. Generate a class just by describing what is needs to do. Choose of many programming languages. To spot a missing character somewhere can be frustrating. This feature will help you to fix it.

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Treblle

Treblle is a federated API Intelligence platform built for enterprises that need full visibility, control, and security over their APIs. With a single integration, Treblle provides real-time API Discovery, Observability, Analytics, Governance, Runtime Security, and Developer Portals. It supports on-prem and private cloud deployments to meet strict compliance and data privacy requirements. Treblle helps teams shift left by surfacing API issues early in development and ensuring consistency across environments. Its AI-powered Integration Assistant simplifies onboarding and reduces manual effort. Trusted by global enterprises and recognized over 15 times by Gartner, Treblle accelerates innovation while giving you complete control over your API landscape.

Starting Price: $25 per month

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Zed

Zed Industries

Zed is a next-generation code editor designed for high-performance collaboration with humans and AI. Written from scratch in Rust to efficiently leverage multiple CPU cores and your GPU. Integrate upcoming LLMs into your workflow to generate, transform, and analyze code. Chat with teammates, write notes together, and share your screen and project. Multibuffers compose excerpts from across the codebase in one editable surface. Evaluate code inline via Jupyter runtimes and collaboratively edit notebooks. Support for many languages via Tree-sitter, WebAssembly, and the Language Server Protocol. Fast native terminal tightly integrates with Zed's language-aware task runner and AI capabilities. First-class modal editing via Vim bindings, including features like text objects and marks. Zed is built by a global community of thousands of developers. Boost your Zed experience by choosing from hundreds of extensions that broaden language support, offer different themes, and more.

Starting Price: Free

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CodeSandbox

CodeSandbox is a cloud development platform that empowers development teams to code, collaborate, and ship projects of any size from any device in record time. Run your code in powerful microVMs and build anything without limits. We configure your environment for you and keep your code always ready, behind a URL. Boxy, the CodeSandbox AI coding assistant, is also now available to all Pro subscribers.

Starting Price: $12 per month

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$Refraction$

Refraction

Refraction is a code-generation tool for developers. It uses AI to generate code for you. You can use it to generate unit tests, documentation, refactor code, and more. Generate code using AI in 34 languages — Assembly, C#, C++, CoffeeScript, CSS, Dart, Elixir, Erlang, Go, GraphQL, Groovy, Haskell, HTML, Java, JavaScript, Kotlin, LaTeX, Less, Lua, MatLab, Objective-C, OCaml, Perl, PHP, Python, R Lang, Ruby, Rust, Sass / SCSS, Scala, Shell, SQL, Swift, and TypeScript. Join thousands of developers around the world using Refraction to generate documentation, create unit tests, refactor code, and more using AI. Use the power of AI to automate the tedious parts of software development like testing, documentation, and refactoring, so you can focus on what matters. Refactor, optimize, fix and style-check your code. Generate unit tests for your code with various test frameworks. Explain the purpose of your code to make it easier to understand.

Starting Price: $8 per month

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SpellBox

With SpellBox, you can say goodbye to hours of frustrating coding and hello to quick, easy solutions. SpellBox creates the code you need from simple prompts, so you can solve your toughest programming problems in seconds. No more time wasted on syntax errors, debugging, or scouring the internet for answers. With SpellBox, you'll have the code you need right at your fingertips, allowing you to focus on what really matters, delivering top-quality results. With the code explanation feature, you can save time by quickly gaining a deep understanding of the code you are working with, without having to spend hours researching or studying documentation. It's the perfect tool for anyone looking to improve their coding proficiency and maximize their productivity. With code bookmarking, you can save your code snippets, and quickly find what you retrieve them later. This feature is especially useful for developers who work on multiple projects and need to access their code snippets frequently.

Starting Price: $40 per month

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Refact.ai

Refact AI

Refact.ai is a cutting-edge, open-source AI coding assistant designed to enhance developer productivity through intelligent code completion, real-time code reviews, and personalized support. By integrating with popular IDEs like VS Code, JetBrains, and PyCharm, Refact.ai provides a seamless development experience, offering personalized auto-completion, code refactoring, and AI-driven suggestions based on your unique codebase. With the ability to fine-tune models using company-specific data, Refact.ai optimizes its performance for better accuracy and faster code generation. Whether you're building new features or improving existing code, Refact.ai ensures your development process is more efficient, secure, and aligned with best practices.

Starting Price: $0

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Cody

Sourcegraph

Cody, Sourcegraph’s AI code assistant goes beyond individual dev productivity, helping enterprises achieve consistency and quality at scale with AI. Unlike traditional coding assistants, Cody understands the entire codebase, enabling deeper contextual awareness for smarter autocompletions, refactoring, and AI-driven code suggestions. It integrates with IDEs like VS Code, Visual Studio, Eclipse, and JetBrains, providing inline editing and chat without disrupting workflows. Cody also connects with tools like Notion, Linear, and Prometheus to enhance development context. Powered by advanced LLMs like Claude Sonnet 4 and GPT-4o, it optimizes speed and performance based on enterprise needs, and is always adding the latest AI models. Developers report significant efficiency gains, with some saving up to six hours per week and doubling their coding speed.

Starting Price: $59

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Lightly

Develop your apps efficiently with Multilingual cloud IDE - Lightly. Create high-quality code in no time with AI-generated code and collaborative development features. Lightly is a powerful cloud IDE that supports multiple programming languages, including Java, Python, C++, HTML, JavaScript. Write, run, and debug code on iPad, anywhere, anytime. The AI-generated code feature helps you quickly generate code. Collaborative development enables easy team collaboration in real-time. Lightly can deploy and host your projects without managing infrastructures. We'll provide project images to efficiently help you deploy on AWS, Azure, GCP, or any other cloud provider. You focus on your creativity and ideas, and let the AI programming assistant do the rest for you!

Starting Price: $9 per month

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BotCity

With the proliferation of user-created Python scripts and AIs outside of IT governance, companies face increasing risks of Shadow IT, such as security breaches, compliance issues, and loss of operational control. BotCity solves this scenario with a centralized governance platform, enterprise orchestration, and real-time visibility into all Python automations, including AI-driven ones. In addition, it enables you to accelerate hyperautomation initiatives with RPA and AI, reduce costs (up to 5x lower than low-code platforms), and run bots flexibly on VMs, containers, and serverless environments, with support for systems such as SAP, Citrix, Windows, and Linux. Free 30-day trial available.

Starting Price: 30-day trial

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DevGPT

Elevate your development game. with DevGPT We handle the routine coding, you focus on more complex and fulfilling tasks, by turning tasks to code. Click below and start transforming your coding experience in just 40 seconds. Generate custom code trained on your own repository and sync effortlessly. A new level of personalized automation in coding. Our AI model generates code in an average of 40 seconds, allowing for rapid prototyping and quicker go-to-market times. Achieve more with fewer resources. With automatically generated unit tests and AI-powered debugging, DevGPT ensures your code meets the highest quality standards. Reduce errors and elevate your end product. Code smarter, not harder. DevGPT understands your code base to deliver precise, ready-to-deploy solutions. Say goodbye to the stress of disorganization and hello to a more focused, efficient, and successful you

Starting Price: $15.99 per month

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Cosine

Cosine is an AI-powered software engineering platform that enables developers and engineering teams to automate coding workflows, run autonomous development tasks, and manage complex software projects across cloud and local environments. Through its cloud platform, developers can delegate coding tasks to AI agents that independently research, write, test, and iterate on code while operating in secure, isolated MicroVM environments. The platform supports multiple operational modes, including autonomous execution, planning, collaborative agent swarms, and manual review workflows, allowing teams to balance automation with human oversight. By combining parallel agent execution, remote infrastructure access, and model-agnostic support for leading AI models, Cosine helps organizations accelerate software delivery while maintaining control, security, and code quality.

Starting Price: $20/month

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McAnswers AI

McAnswers is an AI tool specifically designed for coders to simplify their coding journey. Quickly find and fix code errors and get precise suggestions for code improvement. McAnswers AI supports multiple programming languages. Our AI chatbot for programmers is designed to be a virtual assistant that can help you with a wide range of programming-related tasks.

Starting Price: $8.33 per month

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Fine

Fine.dev

Fine is an AI-powered development platform designed to assist startups by automating tasks throughout the software development lifecycle. It offers a range of AI agent workflows for coding, debugging, testing, and code review, allowing teams to ship daily improvements and resolve pull requests faster. Fine can autonomously create and implement code, conduct pull request reviews, generate tests, and handle common issues without constant human input. The platform integrates seamlessly with GitHub and supports asynchronous work, making it particularly suitable for fast-paced startups. With real-time feedback and live previews, Fine improves productivity and streamlines the development process.

Starting Price: $15 per month

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Codestral

Mistral AI

We introduce Codestral, our first-ever code model. Codestral is an open-weight generative AI model explicitly designed for code generation tasks. It helps developers write and interact with code through a shared instruction and completion API endpoint. As it masters code and English, it can be used to design advanced AI applications for software developers. Codestral is trained on a diverse dataset of 80+ programming languages, including the most popular ones, such as Python, Java, C, C++, JavaScript, and Bash. It also performs well on more specific ones like Swift and Fortran. This broad language base ensures Codestral can assist developers in various coding environments and projects.

Starting Price: Free

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MarsCode

MarsCode: A highly intelligent, ready-to-use AI development tool. With its 'out-of-the-box cloud AI IDE' and 'powerful AI assistant', MarsCode comprehensively facilitates efficient learning and smooth operations for developers. Key Features include: 1. An out-of-the-box cloud AI IDE, liberating development from device and location constraints. 2. Extensions for local IDEs, bring the experience of AI intelligence to traditional development. 3. Boasting features for code completion and generation, bug fixing, code optimization and more, provides intelligent assistance across the full development process to developers. 4. Repository-level intelligent Q&A feature, allowing developers to focus more. 5. Supports different kinds of applications deployment, including websites, AI plugins, and APIs, etc.

Starting Price: Free

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Mistral Large

Mistral AI

Mistral Large is Mistral AI's flagship language model, designed for advanced text generation and complex multilingual reasoning tasks, including text comprehension, transformation, and code generation. It supports English, French, Spanish, German, and Italian, offering a nuanced understanding of grammar and cultural contexts. With a 32,000-token context window, it can accurately recall information from extensive documents. The model's precise instruction-following and native function-calling capabilities facilitate application development and tech stack modernization. Mistral Large is accessible through Mistral's platform, Azure AI Studio, and Azure Machine Learning, and can be self-deployed for sensitive use cases. Benchmark evaluations indicate that Mistral Large achieves strong results, making it the world's second-ranked model generally available through an API, next to GPT-4.

Starting Price: Free

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Monica Code

Monica

One-stop AI Coding Assistant for favorite code editor. Supports GPT-4o and Claude 3.5 Sonnet. Realtime code suggestion based on cursor location and comments while you coding. Select any code and update them with a simple prompt. Easily modify a function or rewrite the whole class. Chat with active file or whole indexed codebase using best models like Claude 3.5 Sonnet or GPT-4o, or send a screenshot to help debugging. Simply ask Monica Code to create or modify multiple files, and navigate through different composed versions. By describing your requirements in natural language, Monica Code can assist in generating appropriate code snippets or structure in your chosen language. This AI-assisted capability applies to various programming tasks, from simple scripts to more complex application structures.

Starting Price: $16.60 per month

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Restack

A framework built specifically for the challenges of autonomous intelligence. Continue to write software using your language practices, libraries, APIs, data and models. Your proprietary autonomous product that adapts and scales with your development. Autonomous AI can automate video creation by generating, editing, and optimizing content, significantly reducing manual tasks in the production process. By integrating with AI tools like Luma AI or OpenAI for video generation, and scaling text-to-speech on Azure, your autonomous system can produce high-quality video content By integrating with platforms like YouTube your autonomous AI can continuously improve based on feedback and engagement metrics. We believe the most promising path to AGI is in the orchestration of millions of autonomous systems. We are a small group of passionate engineers and researchers dedicated to building autonomous artificial intelligence. If this sounds interesting to you, we would love to hear from you.

Starting Price: $10 per month

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16x Prompt

Manage source code context and generate optimized prompts. Ship with ChatGPT and Claude. 16x Prompt helps developers manage source code context and prompts to complete complex coding tasks on existing codebases. Enter your own API key to use APIs from OpenAI, Anthropic, Azure OpenAI, OpenRouter, or 3rd party services that offer OpenAI API compatibility, such as Ollama and OxyAPI. Using API avoids leaking your code to OpenAI or Anthropic training data. Compare the code output of different LLM models (for example, GPT-4o & Claude 3.5 Sonnet) side-by-side to see which one is the best for your use case. Craft and save your best prompts as task instructions or custom instructions to use across different tech stacks like Next.js, Python, and SQL. Fine-tune your prompt with various optimization settings to get the best results. Organize your source code context using workspaces to manage multiple repositories and projects in one place and switch between them easily.

Starting Price: $24 one-time payment

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Qwen2.5-Coder

Alibaba

Qwen2.5-Coder-32B-Instruct has become the current SOTA open source code model, matching the coding capabilities of GPT-4o. While demonstrating strong and comprehensive coding abilities, it also possesses good general and mathematical skills. As of now, Qwen2.5-Coder has covered six mainstream model sizes to meet the needs of different developers. We explore the practicality of Qwen2.5-Coder in two scenarios, including code assistants and artifacts, with some examples showcasing the potential applications of Qwen2.5-Coder in real-world scenarios. Qwen2.5-Coder-32B-Instruct, as the flagship model of this open source release, has achieved the best performance among open source models on multiple popular code generation benchmarks and has competitive performance with GPT-4o. Code repair is an important programming skill. Qwen2.5-Coder-32B-Instruct can help users fix errors in their code, making programming more efficient.

Starting Price: Free

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GitLab Duo

GitLab

Ship more secure software faster with AI throughout the entire software development lifecycle GitLab Duo is an AI-powered assistant integrated into the GitLab platform, designed to enhance software development productivity and collaboration. It provides intelligent code suggestions, helps refactor and debug code, and streamlines workflows by automating repetitive tasks. GitLab Duo also supports natural language queries for project management and development insights, enabling developers to interact with their repositories more intuitively. Integrated with popular IDEs like JetBrains and Neovim, GitLab Duo ensures seamless assistance within developers' preferred environments. By combining AI-driven efficiency with GitLab’s robust DevSecOps features, GitLab Duo empowers teams to deliver high-quality software faster and more collaboratively.

Starting Price: $19/user/month

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Stainless

Anthropic

Stainless is a developer infrastructure platform that automatically generates production-ready SDKs, API documentation, and MCP (Model Context Protocol) servers directly from OpenAPI specifications. The platform helps API companies deliver high-quality developer and agent experiences by creating idiomatic SDKs for multiple programming languages including TypeScript, Python, Go, Java, Ruby, C#, and PHP. Stainless automates the maintenance of SDKs and documentation, ensuring they stay synchronized with API changes while reducing engineering overhead. The platform is designed to improve API usability, streamline integrations, and support AI agent interoperability through standards-based MCP server generation.

Starting Price: $250 per month

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Swagger Codegen

SmartBear

Swagger Codegen can simplify your build process by generating server stubs and client SDKs for any API, defined with the OpenAPI (formerly known as Swagger) specification, so your team can focus better on your API’s implementation and adoption. Moving from design to development has never been easier with Swagger Codegen in SwaggerHub. API Definition files can be used to create stubs in popular languages, like Java, Scala, and Ruby, with just a few clicks.

Starting Price: Free

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AutoRest

Microsoft

The AutoRest tool generates client libraries for accessing RESTful web services. Input to AutoRest is a spec that describes the REST API using the OpenAPI specification format and streamlines the creation of client code across multiple programming languages, including C#, Java, Python, TypeScript, and Go. This automation enhances consistency and efficiency in API consumption, reducing the manual effort required to develop and maintain client libraries. AutoRest operates through a flexible pipeline that processes OpenAPI input files, transforming them into a code model which is then utilized by language-specific generators to produce client code adhering to each language's design guidelines. The tool supports both OpenAPI 2.0 and 3.0 specifications, ensuring compatibility with a wide range of APIs. Developers can install AutoRest on Windows, macOS, or Linux systems, with installation facilitated via Node.js.

Starting Price: Free

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Fynix

Fynix is an AI-powered platform designed to boost software development productivity through intelligent coding assistance and agent-based code reviews. It integrates directly into popular IDEs like VS Code and offers features such as context-aware autocomplete, natural language commands for code fixes and translations, and automatic code flow visualizations. Fynix’s Code Assistant helps developers write cleaner, more efficient code faster, while its upcoming Code Quality Agent will automate bug detection and enforce coding standards. With support for multiple programming languages and frameworks, and integrations with tools like Jira, Fynix is a versatile platform for improving coding efficiency and collaboration.

Starting Price: Free

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SoftSpell

SoftSpell is an AI-powered platform designed to optimize the entire software development lifecycle (SDLC), evolving from its original CodeSpell foundation. It enables teams to move seamlessly from requirements gathering to deployment using AI-assisted workflows. The platform includes modules like ReqSpell, CodeSpell, and TestSpell to handle documentation, development, and testing. SoftSpell helps modernize legacy systems by transforming outdated codebases into scalable, cloud-ready architectures. It improves efficiency by automating requirement analysis, code generation, and test creation. The platform integrates with popular IDEs and development tools, ensuring compatibility with existing workflows. Overall, SoftSpell delivers a unified solution for faster, more consistent, and scalable software development.

Starting Price: $15/month/user

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ByteDance Seed

ByteDance

Seed Diffusion Preview is a large-scale, code-focused language model that uses discrete-state diffusion to generate code non-sequentially, achieving dramatically faster inference without sacrificing quality by decoupling generation from the token-by-token bottleneck of autoregressive models. It combines a two-stage curriculum, mask-based corruption followed by edit-based augmentation, to robustly train a standard dense Transformer, striking a balance between speed and accuracy and avoiding shortcuts like carry-over unmasking to preserve principled density estimation. The model delivers an inference speed of 2,146 tokens/sec on H20 GPUs, outperforming contemporary diffusion baselines while matching or exceeding their accuracy on standard code benchmarks, including editing tasks, thereby establishing a new speed-quality Pareto frontier and demonstrating discrete diffusion’s practical viability for real-world code generation.

Starting Price: Free

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Qoder

Qoder is an agentic coding platform engineered for real software development, designed to go far beyond typical code completion by combining enhanced context engineering with intelligent AI agents that deeply understand your project. It allows developers to delegate complex, asynchronous tasks using its Quest Mode, where agents work autonomously and return finished results, and to extend capabilities through Model Context Protocol (MCP) integrations with external tools and services. Qoder’s Memory system preserves coding style, project-specific guidance, and reusable context to ensure consistent, project-aware outputs over time. Developers can also interact via chat for guidance or code suggestions, maintain a Repo Wiki for knowledge consolidation, and control behavior through Rules to keep AI-generated work safe and guided. This blend of context-aware automation, agent delegation, and customizable AI behavior empowers teams to think deeper, code smarter, and build better.

Starting Price: $20/month

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Brokk

Brokk is an AI-native code assistant built to handle large, complex codebases by giving language models compiler-grade understanding of code structure, semantics, and dependencies. It enables context management by selectively loading summaries, diffs, or full files into a workspace so that the AI sees just the relevant portions of a million-line codebase rather than everything. Brokk supports actions such as Quick Context, which suggests files to include based on embeddings and structural relevance; Deep Scan, which uses more powerful models to recommend which files to edit or summarize further; and Agentic Search, allowing multi-step exploration of symbols, call graphs, or usages across the project. The architecture is grounded in static analysis via Joern (offering type inference beyond simple ASTs) and uses JLama for fast embedding inference to guide context changes. Brokk is offered as a standalone Java application (not an IDE plugin) to let users supervise AI workflows clearly.

Starting Price: $20 per month

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Best AI Code Generators for Java - Page 2

Compare the Top AI Code Generators that integrate with Java as of September 2026 - Page 2

Programming Helper

Treblle

Zed

CodeSandbox

Refraction

SpellBox

Refact.ai

Cody

Lightly

BotCity

DevGPT

Cosine

McAnswers AI

Fine

Codestral

MarsCode

Mistral Large

Monica Code

Restack

16x Prompt

Qwen2.5-Coder

GitLab Duo

Stainless

Swagger Codegen

AutoRest

Fynix

SoftSpell

ByteDance Seed

Qoder

Brokk

Best AI Code Generators for Java - Page 2

Compare the Top AI Code Generators that integrate with Java as of September 2026 - Page 2

Programming Helper

Treblle

Zed

CodeSandbox

Refraction

SpellBox

Refact.ai

Cody

Lightly

BotCity

DevGPT

Cosine

McAnswers AI

Fine

Codestral

MarsCode

Mistral Large

Monica Code

Restack

16x Prompt

Qwen2.5-Coder

GitLab Duo

Stainless

Swagger Codegen

AutoRest

Fynix

SoftSpell

ByteDance Seed

Qoder

Brokk

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