javav-rs

A tool to find the minimum Java version required to run given .class and .jar files.

Support up to Java 17 on Windows, macOS, and Linux.

Installation

You can download the pre-build artifacts on the Release page.

Usage

$ ./javav-rs
A tool to find the minimum Java version required to run given .class and .jar files.

Usage: ./javav-rs [file ...]

$ ./javav-rs Main.class Main.jar
Main.class: compiled Java class data, require Java 17 or above
Main.jar: Java archive data (JAR), require Java 8 or above

Build

Clone the repository:

git clone https://github.com/yuxqiu/javav-rs.git

Then, run:

cargo build --release

Feature/Plan

• Display version information for .class file
• Display max class version for .jar file
• Respect multi-release Jar file
• Use custom .class parser that supports latest .class file specification