🧠 HP-12C Financial Calculator (JavaFX)

Simulation of an HP-12C financial calculator developed in Java, using JavaFX for the graphical interface. This project allows financial and mathematical calculations exactly like the classic HP-12C, including compound interest operations, present value (PV), future value (FV), payments (PMT), interest rate (i), and number of periods (n).

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🚀 Features

✔️ Mathematical Operations:

• Addition
• Subtraction
• Multiplication
• Division
• Power (xʸ)
• Square root (√)
• Factorial (n!)
• Natural logarithm (ln)
• Exponential (eˣ)
• Inverse (1/x)
• Swap registers (x↔y)
• CHS operator (change sign)

✔️ Financial Operations:

• Calculate n (number of periods)
• Calculate i (interest rate)
• Calculate PV (present value)
• Calculate FV (future value)
• Calculate PMT (payment amount)

✔️ Memory Functions:

• STO (store values in registers)
• RCL (recall values from registers)
• Clear registers using CLX + f

✔️ Special Keys:

• f and g to access secondary functions
• Prefixes and handling just like the real HP-12C

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🏗️ Project Structure

src/ │ ├── financialcalculator/ -> Main file (FXML Controller) │ ├── FinancialClass/ │ └── interest.java -> Handles financial calculations (FV, PV, PMT, n, i) │ ├── MathFunctions/ │ └── FuncoesMatematica.java -> Handles mathematical functions (power, factorial, root, etc.) │ ├── memory/ │ └── STO.java -> Memory management (STO and RCL) │ └── resources/ -> FXML files and images

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💻 Technologies Used

• Java 17+ ☕
• JavaFX (FXML)
• Scene Builder (for UI design)
• Recommended IDEs: IntelliJ, Eclipse, or NetBeans

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💻 Technologies Used

• Java 17+ ☕
• JavaFX (FXML)
• Scene Builder (for UI design)
• Recommended IDEs: IntelliJ, Eclipse, or NetBeans

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🔢 Financial Formulas Implemented

📍 Payment (PMT):

[ PMT = PVi(1+i)^n / (1 + i)^n - 1 ]

📍 Future Value (FV):

[ FV = C(1 + i)^n ]

📍 Present Value (PV):

[ PV = FV/(1 + i)^n ]

📍 Interest Rate (i):

[ i = (FV/PV)^1/n - 1 ]

📍 Number of Periods (n):

[ N = ln(FV/PV)/ln(1 + i) ]

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📲 How to Run the Project

1. Clone the repository:

git clone https://github.com/yourusername/hp12c-javafx.git


Import the project into your preferred IDE.

Configure JavaFX:

Download JavaFX SDK

Link JavaFX libraries to your project (VM Options and Build Path)

Run the project using the main class.




🧠 Future Improvements
Save data using JSON or XML.

Implement dark and light themes.

Add a scientific calculator mode.

Implement statistical calculations.



🙌 Contribution
Feel free to:

Report bugs

Suggest improvements

Fork the repository and submit Pull Requests



👨‍💻 Author
Gabriel Santos Silva
📧 [email protected]



Team:
👨‍💻 João Pedro Almeida - Jp-Almeida0913

👨‍💻 Arthur Augusto - ArthurAugusto-1203

👨‍💻 Estevan Santos - EstevamLuiz