JavaCheck `javacheck/`

Location: javacheck/
Language: Java
Purpose: Java runtime property detection Latest Version: 0.0.5-1

Overview

JavaCheck is a minimal Java program that prints system properties. It's used by ProjT Launcher to detect and validate Java installations.

How It Works

┌─────────────────┐      ┌─────────────┐     ┌──────────────┐
│  ProjT Launcher │────▶│  JavaCheck  │────▶│   stdout     │
│     (C++)       │      │   (Java)    │     │  properties  │
└─────────────────┘      └─────────────┘     └──────────────┘

Execution

java -jar javacheck.jar java.version java.home os.arch

Output

java.version=17.0.9
java.home=/usr/lib/jvm/java-17-openjdk
os.arch=amd64

Properties Checked

Exit Codes

Usage in Launcher

ProjT Launcher uses JavaCheck to:

1. Validate Java installations — Ensure Java is working
2. Detect version — Choose correct Java for Minecraft version
3. Get architecture — Match 32/64-bit requirements
4. Auto-detect Java — Find installed JREs/JDKs

Building

cd javacheck
javac JavaCheck.java
jar cfe javacheck.jar JavaCheck JavaCheck.class

Related Documentation

• LauncherJava — Launch component
• Program Info — Application config