{"id":232109,"date":"2025-05-19T08:55:03","date_gmt":"2025-05-19T15:55:03","guid":{"rendered":"https:\/\/devblogs.microsoft.com\/java\/?p=232109"},"modified":"2025-10-14T23:16:45","modified_gmt":"2025-10-15T06:16:45","slug":"public-preview-app-mod-java","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/java\/public-preview-app-mod-java\/","title":{"rendered":"Announcing Public Preview of the GitHub Copilot app modernization for Java"},"content":{"rendered":"

Modernizing Java applications and migrating to the cloud is often a complex, time-consuming, and fragmented process. GitHub Copilot app modernization for Java <\/strong><\/span>is a powerful solution designed to simplify and accelerate your journey to the cloud.<\/p>\n

Available now in Public Preview as <\/strong>a Visual Studio Code extension<\/a>, GitHub Copilot app modernization for Java<\/strong> <\/span> provides an intelligent, guided approach to Java upgrades and modernization\u2014automating repetitive tasks, improving consistency, and reducing risk.<\/p>\n

Six Core Value Pillars<\/h2>\n

1.Intelligent Issue Analysis & Recommendation\u00a0<\/strong><\/h3>\n

Modernization starts with insight. Whether you\u2019re upgrading Java runtime or migrating to Azure, modernization starts with understanding your code. Our tool<\/span> analyzes your project\u2019s current state and generates a plan, offering <\/span>context-aware fixes<\/span><\/b> and actionable recommendations from <\/span>Azure Migrate Application Code Assessment Tool (AppCAT)<\/span><\/b>, so you spend less time diagnosing and more time modernizing.\u00a0<\/span>AppCAT is also available as a stand-alone CLI tool. See <\/span>AppCAT for Java<\/span><\/a> to learn more.<\/span>\u00a0<\/span><\/p>\n

\"Intelligent<\/a><\/p>\n

2.Expert-led Code Transformation<\/strong><\/h3>\n

Once plan is generated, GitHub Copilot App Modernization for Java is a powerful code transformation engine that combines <\/span>expert-led migration strategies<\/span><\/b> and <\/span>automated Java upgrade<\/span><\/b>.<\/span> Whether you’re moving from Java 8 to Java 21 or re-platforming for Azure services, Copilot applies structured changes with precision.<\/span>\u00a0<\/span><\/p>\n

For cloud modernization scenarios, it offers predefined AI-powered formulas<\/strong> that encode proven migration strategies. These formulas apply expert knowledge to common Java-to-Azure scenarios with high accuracy. Currently supported formulas include secret management, message queue integration, identity, and more. See the predefined formulas<\/a> page for a full list.<\/p>\n

For Java upgrades, the extension execute tools like OpenRewrite<\/strong><\/a> to apply code transformations, dynamically resolve build issues, and run test validations \u2014 ensuring a smooth, error-free upgrade process.<\/p>\n

\"Expert-led<\/a><\/p>\n

3.Automation Through Learning<\/span><\/span>\u00a0<\/span><\/strong><\/h3>\n

Beyond predefined strategies, developers can capture their own migration logic into custom reusable formulas<\/strong>. This is done by converting Git commits into structured migration patterns\u2014allowing teams to scale and reuse learned remediations<\/strong> across multiple codebases with accuracy and consistency.<\/p>\n

Custom formulas can be created from one or more commits, provided they accurately reflect the intended coding behaviors.<\/span> The e<\/span>xample below <\/span>combines <\/span>previous<\/span> code changes <\/span>from local file to Azure Blob and RabbitMQ to Azure Service Bus<\/span> into one <\/span>powerful<\/span>,<\/span> all-encompassing <\/span>formula, and executes it against<\/span> my current project.<\/span><\/span>\n<\/span><\/p>\n

4.Automatic Error Fixing<\/span><\/span><\/strong><\/h3>\n

Modernization <\/span>isn’t<\/span> complete until your application successfully builds. <\/span>GitHub Copilot App Modernization for Java <\/span>helps resolve issues automatically and performs test validations, ensuring error-free transformations and keeping your production pipelines running smoothly.<\/span><\/span>\u00a0<\/span><\/p>\n

\"GitHub<\/a><\/p>\n

5.Post-upgrade CVE and Code Inconsistency Validation<\/strong><\/h3>\n

The GitHub Copilot App Modernization for Java scans for CVE vulnerabilities and code inconsistencies after the upgrade process is completed. When such issues are detected, the tool automatically fixes the issues within the Agent Mode, allowing the user to review the fixes. This improves the application’s security posture and ensures compliance with organizational guidelines.<\/span><\/span>\u00a0<\/span><\/p>\n

\"GitHub<\/a><\/p>\n

6.Automated Deployment to Azure<\/span><\/span>\u00a0<\/span><\/strong><\/h3>\n

 <\/p>\n

What our customers are saying<\/span><\/span>\u00a0<\/span><\/strong><\/h3>\n

Install the Extension<\/strong><\/h2>\n

To use all features mentioned above, please download and install\u00a0Extension<\/a>\u00a0for GitHub Copilot app modernization for Java.<\/p>\n

Get Started Today<\/span><\/b> \u00a0<\/span><\/h2>\n

\"Partnership<\/a><\/p>\n

When <\/span>you\u2019re<\/span> ready,<\/span> GitHub Copilot for Azure<\/span> helps <\/span>facilitate<\/span> automated deployment to Azure<\/span>, completing the app modernization process. <\/span>When the Copilot agent is requested to deploy your application, it creates the required Infrastructure as Code files, deploys the application, addresses any deployment errors <\/span>encountered<\/span>, and sets up CI\/CD pipelines.<\/span> <\/span>GitHub Copilot for Azure<\/span><\/span><\/a> is a separate e<\/span>x<\/span>tension today<\/span> and <\/span>efforts are underway to integrate it with GitHub Copilot App Modernization for Java.<\/span><\/span><\/p>\n

\"Automation<\/a><\/p>\n