Universal Java Launcher

A bash script for easy and automated execution of Java applications (.jar) in a Linux environment. The script intelligently searches for executable files and handles the availability of the Java Runtime Environment (JRE).

Features

• Automatic JAR Detection: The script automatically finds the first .jar file in the dist folder.
• Java Prioritization:
  1. First, it attempts to use the system-wide Java installation (command -v java).
  2. If system Java is missing, it tries to run the application using a local JRE located in the jre_linux directory.
• Robust Error Handling: Informs the user if the JAR file or JRE is missing and suggests a solution.

Directory Structure

For the script to function correctly, maintain the following structure:

.
├── universal-java-launcher.sh  # This script
├── dist/                       # Folder containing your .jar file
└── jre_linux/                  # (Optional) Local JRE for Linux

Usage

1. Ensure the script has execution permissions:

   chmod +x universal-java-launcher.sh

2. Important: If the script was edited on Windows, fix the line endings before running:

   sed -i 's/\r$//' universal-java-launcher.sh

3. Run the script:

   ./universal-java-launcher.sh

Resources

Configuration

Variables for modifying paths are located at the beginning of the script:

• JAVA_DIR: Path to the local JRE.
• DIST_DIR: Path to the directory with distribution JAR files.

Requirements

• Linux OS
• Bash shell
• Java JRE (System or Local)