Complex Billing System

A robust Java-based utility billing management system that handles multiple utilities (electricity, water, gas, internet, and phone services) using file handling and file-based data persistence. Built with a procedural programming approach, this system efficiently manages billing operations through structured functions, ensuring comprehensive billing management and detailed reporting capabilities.

🚀 Features

✅ Bill Management

• Generate new monthly utility bills
• Update existing bills for previous months
• Automatic bill calculations based on meter readings
• Multi-utility support: Electricity, Water, Gas, Phone, Internet

🔍 Search and View Capabilities

• View complete consumer records for specific months/years
• Search functionality:
  • By Consumer ID
  • By Address (Block/Sector/Street/House/Floor)
• Flexible viewing options:
  • Single month view
  • Yearly view
  • Custom date range view

📊 Analysis and Reporting

• Maximum/Minimum bill analysis for:
  • Individual utilities
  • Blocks/Sectors
  • Streets
  • Houses
• Detailed monthly billing reports
• Yearly and half-yearly summaries
• Utility-specific consumption patterns

🏠 Address System Structure

• Hierarchical organization:
  • Sectors (A-J)
  • Sub-sectors (1-4)
  • Streets (1-10)
  • Houses (1-20)
  • Floors (Ground, First, Second)

🛠 Installation

1️⃣ Clone the Repository

 git clone https://github.com/yourusername/complex-billing-system.git  

2️⃣ Configure File Paths

• Locate all file handling paths in the code
• Default path pattern:

 Z:\Uni\S2\cbs\records\  

• Update these paths to match your system’s directory structure:

 C:\YourDirectory\billing-system\records\  

🚀 Initial Setup

🏗 Automatic Record Creation

The system includes an automated data generation feature:

1. Launch the application
2. Select Option 7: "Auto file creation and random data entry loop"
3. Configure:
   • Number of Sectors (A-J)
   • Number of Sub-sectors (1-4)
   • Number of Streets (1-10)
   • Number of Houses (1-20)
   • Number of Floors

The system will automatically generate records based on your specifications, saving setup time.

📂 Default Data Structure

The default files include:
✅ 4 Sectors (A-D)
✅ 4 Sub-sectors
✅ 4 Streets
✅ 4 Houses
✅ 2 Floors

📌 Requirements

• Java Development Kit (JDK) 8+
• Sufficient disk space for record storage

▶️ Usage

1️⃣ Compile the Java Files

javac practice.java  

2️⃣ Run the Application

java EmployeeDemo  

3️⃣ Navigate the Menu-Driven Interface

⚠️ Important Notes

• Ensure file paths are properly configured before running
• Use the automatic record creation for initial setup
• Backup existing records before making major changes
• Maintain the directory structure for smooth file handling

🤝 Contributing

Want to contribute? Fork this repository, make changes, and submit a pull request!

📜 License

This project is licensed under the MIT License. See the LICENSE file for details.

For any issues or queries, feel free to open an issue in the repository! 🚀