💻 MyCMD – A Custom Command Prompt in Java

MyCMD is a fully custom command prompt implemented in Java.
It mimics the behavior of Windows cmd.exe with commands like dir, cd, echo, mkdir, del, and more — plus it has its own installer.

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📂 Project Structure

MyCMD/
 ┣ README.md                  # Project description, badges, usage
 ┣ pom.xml                    # Maven build config
 ┣ src/
 ┃ ┗ main/
 ┃    ┗ java/
 ┃       ┗ com/
 ┃          ┗ mycmd/
 ┃             ┣ App.java          # Main entry point (starts the shell)
 ┃             ┣ ShellContext.java # Stores current working dir, state
 ┃             ┣ Command.java      # Interface for all commands
 ┃             ┗ commands/         # All custom command classes
 ┃                ┣ DirCommand.java
 ┃                ┣ CdCommand.java
 ┃                ┣ EchoCommand.java
 ┃                ┣ MkdirCommand.java
 ┃                ┣ RmdirCommand.java
 ┃                ┣ CopyCommand.java
 ┃                ┣ DelCommand.java
 ┃                ┣ TypeCommand.java
 ┃                ┣ ClsCommand.java
 ┃                ┣ HelpCommand.java
 ┃                ┣ ExitCommand.java
 ┃                ┗ VersionCommand.java
 ┣ icons/
 ┃ ┗ mycmd.ico              # App/installer icon
 ┣ scripts/
 ┃ ┣ build-windows.bat      # Build + package EXE + run installer script
 ┃ ┗ build-linux.sh         # Build + package for Linux (deb/rpm)
 ┣ installer/
 ┃ ┗ mycmd.iss              # Inno Setup script for Windows installer
 ┗ dist/                    # Output folder (auto-created after build)
    ┣ bin/
    ┃ ┗ MyCMD.exe           # Wrapped executable (via Launch4j or jpackage)
    ┣ lib/
    ┃ ┗ dependencies.jar    # Extra JAR dependencies (if any)
    ┗ setup.exe             # Generated installer (from Inno Setup)

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🚀 Features

• ✅ Windows-like commands (dir, cd, mkdir, del, copy, type, cls)
• ✅ Extensible via Java classes (easy to add new commands)
• ✅ Packaged into .exe using Launch4j
• ✅ Installer wizard using Inno Setup
• ✅ Works on Windows and Linux (via jpackage)

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📦 Requirements

To build MyCMD you need:

• Java JDK 17+
• Apache Maven
• Launch4j (for .exe wrapping)
• Inno Setup (for Windows installer)

(Linux users can use jpackage instead of Launch4j/Inno Setup.)

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🛠️ Build Instructions

🔹 Windows

scripts\build-windows.bat

👆🏻 This will:

• Build the JAR with Maven

• Wrap it into an .exe with Launch4j

• Generate a setup.exe installer with Inno Setup

Final Output

dist/
 ┣ bin/MyCMD.exe
 ┣ lib/dependencies.jar
 ┗ setup.exe

Linux

chmod +x scripts/build-linux.sh
./scripts/build-linux.sh

This will build a .deb or .rpm package using jpackage.

🖥️ Usage

After installation, run:

MyCMD

You can now use commands like:

> dir
> cd ..
> mkdir test
> echo Hello World!
> type file.txt
> del file.txt
> help
> exit

🧩 Extending MyCMD

Note

There are many commands left like ls and Ping Command

🤝 Contributing

• Fork the repo (or request an invite if it’s in the org)

• Create a feature branch

• Commit your changes

• Open a Pull Request

📜 License

Licensed under the Apache License You are free to use, modify, and distribute.