Believe it or not you can use Microsoft's Visual Studio Code from your web browser, or at least, versions of it.

Git in Visual Studio Code With Git and GitHub everywhere at Microsoft, it’s also built into Microsoft’s developer tools and into how developers build apps on Windows and for Azure. When you ...

If GitHub Copilot is not working or is not responding in Visual Studio or VS Code, it's most likely facing an authentication, network, or compatibility issue.

That has changed somewhat. Among other innovations, Visual Studio Code now has good support for editing, running, and debugging Java code through a set of Java-specific extensions.