Crate java_manager 

A library for locating Java installations on the local system and executing Java programs.

This crate provides functionality to:

• Discover Java runtimes via PATH, JAVA_HOME, or deep system scans.
• Extract detailed metadata (version, vendor, architecture) from each installation.
• Execute Java applications with configurable arguments, memory settings, and I/O redirection.

Examples

use java_manager::{java_home, JavaRunner};

// Find all Java installations in PATH
let java = java_home().unwrap();
// Run a JAR file
JavaRunner::new()
    .java(java)
    .arg("--version")
    .execute()?;

Re-exports

pub use cache::JavaCache;

pub use error::JavaError;

pub use execute::JavaRedirect;

pub use execute::JavaRunner;

pub use info::JavaInfo;

pub use info::JavaVersion;

pub use local::java_home;

pub use search::deep_search;

pub use search::full_search;

pub use search::quick_search;

pub use spec::JavaSpec;

Modules

cache

TTL-based cache that avoids redundant full-disk scans of Java installations. TTL-based cache for Java search results.

error

Error types returned by every fallible operation in this crate. Error types for Java environment detection and execution.

execute

Execute Java programs with configurable arguments, memory, and I/O. Running Java programs with controlled output and redirection.

info

JavaInfo and JavaVersion — structured metadata from a Java installation. Core type representing a Java installation and its metadata.

local

Read the JAVA_HOME environment variable. Functions for accessing Java from the local environment.

search

Discover Java installations via PATH, Everything SDK, registry, BFS, and more. System-level discovery of Java installations.

spec

Human-readable Java spec parsing and matching ("Eclipse Adoptium v^17.0.0 ax86_64"). Human-readable Java specification parsing and matching.

Functions

best_match

Pick the best (highest version) match from a list of JavaInfo.

filter_by_version

Filter a list of JavaInfo by a version requirement.