jtop - A Java-based System Monitoring Tool

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Note: This project is not related to the Python-based jtop for NVIDIA Jetson devices (https://rnext.it/jetson_stats/)

Overview

jtop is a lightweight, terminal-based system monitoring tool written in Java. It aims to replicate the basic functionality of the top command, providing a modular interface for easy system monitoring.

Features

• Resource-efficient design
• No external build tools required
• Modular and tab-based interface
• Supports Java 21+

Target Platform

• Linux (primary target)
• Other platforms (e.g. macOS, freeBSD) may be supported in the future, pending compatibility testing and development.

Getting Started

Prerequisites

• Java 21+ installed on your system
• Linux platform

Building and Running Locally

1. Clone the repository:

   git clone https://github.com/JGH0/jtop.git
   cd jtop

2. Compile the code:

   javac src/*.java

3. Run the application:

   java src/Main.java

System-wide Installation

To install jtop globally so that it can be run from any terminal:

1. Clone the repository (if not done already):

   git clone https://github.com/JGH0/jtop.git
   cd jtop

2. Make the build and install scripts executable:

   chmod +x build.sh install.sh

3. Build the project using the provided build script:

   ./build.sh

4. Install globally (requires root privileges):

   sudo ./install.sh

5. Run jtop from anywhere:

   jtop

Notes:

• The build.sh script compiles all Java source files and creates an executable jtop.jar.
• The install.sh script copies jtop.jar to /usr/local/lib/jtop and installs a wrapper script in /usr/local/bin for easy execution.

Usage

jtop provides a simple and intuitive interface for system monitoring. Use the following keys to navigate:

• j/k: Scroll up/down
• Enter: Scroll entire row
• q or Ctrl+C: Quit

Contributing

We welcome contributions from the community! To contribute:

1. Fork the repository.
2. Create a new branch for your feature or bug fix.
3. Make your changes with proper testing.
4. Submit a pull request detailing your modifications.

Developer Documentation

Developer documentation is generated using JavaDoc. To generate and view the documentation:

chmod +x generate_javadoc.sh
./generate_javadoc.sh

This will create a docs/ folder with HTML documentation you can view in your browser.

License

jtop is licensed under the MIT License. See LICENSE for details.

Author

• Jürg Georg Hallenbarter

Note

jtop is currently in Alpha stage, which means it is still a work-in-progress and may contain bugs or incomplete features. Use at your own risk!