Kata 4: Email Histogram

Problem Description

This project creates an application to process a list of email addresses and generate a histogram of domain frequencies. The program reads email data from a file, processes it to extract domains, builds a histogram, and displays the results using a bar chart.

The exercise combines file handling, data processing, and visualization, emphasizing modular design with a clean separation between the model, view, and control.

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Functionalities

1. Read and Process Emails

   • The program reads a list of email addresses from a file (emails.txt).
   • Extracts and counts the frequency of email domains.

2. Build a Histogram

   • Constructs a histogram representing domain frequencies using a generic Histogram class.

3. Visualize the Data

   • Displays the histogram as a bar chart using the JFreeChart library.

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Scope

This project demonstrates:

• File Handling: Reading and processing data from text files.
• Histogram Building: Generic data structures and frequency counting.
• Data Visualization: Integrating Java with external libraries like JFreeChart for charting.
• Modular Design: Using model-view-controller (MVC) principles for clear separation of responsibilities.