New Java CLI tools 'ja' and 'jig' introduced for module system development

Introduction of New Java CLI Tools

A preview of 'ja' and its family of composable command-line tools has been announced. These tools are designed to enhance the modern Java development experience by building on the capabilities of the Java Module System. The goal is to provide a more streamlined command-line interface for creating and consuming Java modules.

Module Descriptor as Project Description

The new tools utilize the module descriptor as a complete project description. This includes placing dependency versions alongside 'requires' directives and incorporating module metadata through documentation tags. This approach aims to integrate dependency management more naturally within the module system.

Composable Tooling for Developers and Agents

While Java has traditionally relied heavily on graphical IDEs, these new tools address gaps in command-line capabilities, particularly for coding agents that often struggle with locating dependencies, documentation, and source code. 'ja' provides command-line ergonomics and tool orchestration, but its underlying features are standalone tools that can be composed independently.

Key Components: jig and jfmt

Among the introduced tools, 'jig' performs module version resolution, compilation, and assembly, outputting standard module system arguments. It also acts as a bridge to Maven repositories, offering a standalone module proxy and publishing commands. Another tool, 'jfmt', is responsible for formatting source code according to the Code Convention.