🖥️ Java Shell – Command Line Interpreter

A simple, cross-platform shell (command-line interpreter) written in Java.
Supports command execution, cd navigation, input/output redirection (>, <), and single piping (|), all compatible with Windows CMD, PowerShell, and Git Bash.

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📌 Project Overview

This project simulates a Unix-style shell using Java. It allows users to execute shell commands, manage directories, and handle redirection and pipes—teaching core Operating System concepts like:

• 👶 Process Creation (fork() + exec() equivalent using ProcessBuilder)
• 🔄 Input/Output Redirection
• 🔧 Pipe Handling
• 📂 Directory Management
• 🧵 Process Synchronization (waitFor())

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🚀 Features

✅ Custom prompt: mysh>
✅ Supports Windows commands like dir, type, echo, findstr
✅ cd command implemented manually
✅ Handles:

• Standard output redirection: echo Hello > out.txt
• Standard input redirection (limited): somecommand < file.txt
• Piping: type file.txt | findstr Hello

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🧑‍💻 Usage

▶️ Running the Shell

javac MyShell.java CommandExecutor.java
java MyShell