🔁 Reverse Echo Server-Client using Java TCP Sockets

This is a simple Java-based socket programming project that demonstrates a TCP-based client-server system. The server receives input from the client, reverses the message, waits for a few seconds (to simulate processing), and then sends the reversed message back to the client.

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📡 What is Socket Programming?

Socket programming is a way to enable communication between two machines over a network. In Java, this involves:

• 🧱 A ServerSocket that listens on a specific port
• 🔌 A Socket on the client side to connect to the server
• 📬 Input/Output streams to send and receive data

This project uses TCP sockets, which means the communication is connection-oriented, reliable, and data is received in order.

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🖼️ Architecture: Client-Server Reverse Echo

The following diagram shows how the client and server interact:

1. Server starts and listens on a port (2000)
2. Client connects to the server
3. Client sends a message
4. Server reverses the message and returns it
5. Communication ends when the message "end" is sent

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💻 How It Works

Here’s a snapshot of the actual working:

• Client sends hello
• Server returns olleh
• Communication continues until end (which becomes dne reversed)

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🧠 Key Concepts Demonstrated

Concept	Description
ServerSocket	Accepts incoming TCP connections
Socket	Used by both client and server to exchange data
BufferedReader / PrintStream	For input and output stream handling
Thread.sleep()	Simulates server delay
try-with-resources	Ensures clean closing of sockets and streams

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🚀 How to Run

✅ Compile the Java files:

javac ReverseEcho.java

javac Client.java