Crate rusty_jvm

Rusty JVM

A JVM interpreter written in Rust from scratch — no dependency on existing JVMs.

rusty-jvm executes Java bytecode in interpreted mode and aims to support as much of the Java language as possible. Currently supports a range of Java language features up to Java 23 (excluding GC and lambdas for now).

Features

Refer to the README.md

Usage Modes

The binary supports three main modes, based on CLI arguments:

• (default) Runs a Java class file with an entry point.
• --install – Installs standard libraries (used by the VM).
• --purge – Removes installed standard libraries.

Example

Installing core libraries

rusty-jvm --install

Creating a simple Java program

Windows

echo public class Hello { public static void main(String[] args) { System.out.println("Hello, world!"); } } > Hello.java

Unix-like systems

echo 'public class Hello { public static void main(String[] args) { System.out.println("Hello, world!"); } }' > Hello.java

Compiling the Java program (current supported version is Java 23)

javac Hello.java

Running the compiled Java program with Rusty JVM

rusty-jvm Hello

Structs

ParsedArguments

Represents the parsed command-line arguments for the Java program.

Functions

run

Launches the Rusty Java Virtual Machine with the given arguments.