JAVA

Create a client-server application with a server that runs indefinitely and processes textual input from the client.

The communication protocol between the server and the client, after the connection setup, is as follows:

-. Server:

Sends a request to the client: "Welcome to text-server v0.1. Available server string processing mode: A = echo input; B = duplicate input; C = reverse input; D = uppercase input. Please select server mode: "

-. Client:

Accepts request message.

Sends a string to the server, with a valid selected server mode.

-. Server:

Accepts server mode message.

Sends a message to the client with the current server mode: "Selected server mode: (mode selected). Enter message. To end the connection, enter '.' "

-. Server

Accepts client messages.

-. Client

Reads message from keyboard and sends it to the server.

If message is '.', close link connection.

-. Server

Accepts client message.

If message is '.', close link connection.

Processes the string message according to the server mode selected.

Sends the processed message to the client.