Scientific Calculator

A feature-rich scientific calculator built with Java and JavaFX, featuring a modern dark theme and comprehensive mathematical operations.

Features

Basic Operations

• Addition, Subtraction, Multiplication, Division
• Decimal point support
• Sign change (+/-)
• Power operations (x^y)

Scientific Functions

• Trigonometric: sin, cos, tan, asin, acos, atan
• Logarithmic: Natural logarithm (ln), Common logarithm (log)
• Exponential: e^x
• Other: Square root (√), Square (x²), Reciprocal (1/x), Factorial (x!)

Constants

• π (Pi): 3.14159...
• e (Euler's number): 2.71828...

Additional Features

• Angle Mode Toggle: Switch between Radians and Degrees
• Clear Functions:
  • C (Clear all)
  • CE (Clear entry)
  • Backspace
• Error Handling: Graceful handling of division by zero and invalid operations
• Minimalistic UI: Dark theme with color-coded buttons for easy navigation

Requirements

• Java Development Kit (JDK): Version 17 or higher
• JavaFX SDK: Version 17 or higher (must match your Java version)

Java & JavaFX Version Compatibility

Java Version	Compatible JavaFX Version
Java 11-17	JavaFX 17
Java 18-20	JavaFX 20
Java 21+	JavaFX 21+

Installation

Prerequisites

1. Install Java JDK

   • Download from: Oracle JDK or OpenJDK
   • Verify installation: java -version

2. Download JavaFX SDK

   • Download from: Gluon JavaFX
   • Extract to a location (e.g., C:\javafx-sdk-17)

Project Setup

Clone or download this repository:

git clone https://github.com/yourusername/scientific-calculator.git
cd scientific-calculator

Running the Application

Refer to your IDE or build tool documentation for running JavaFX applications with the appropriate module path configuration.

Project Structure

scientific-calculator/
├── README.md
└── ScientificCalculator.java    # Main application file

Usage Guide

Basic Calculations

1. Enter numbers using the number pad (0-9)
2. Click an operator (+, -, *, /)
3. Enter the second number
4. Press = to see the result

Scientific Functions

1. Enter a number
2. Click the desired function (sin, cos, log, etc.)
3. The result is displayed immediately

Using Constants

• Click π to insert Pi value
• Click e to insert Euler's number

Angle Mode

• Click Rad to toggle between Radians and Degrees mode
• Affects trigonometric functions (sin, cos, tan)

Special Operations

• x^y: Enter base number, click x^y, enter exponent, press =
• x!: Enter a non-negative integer, click x!
• +/-: Change the sign of the current number
• 1/x: Calculate reciprocal of current number

Button Reference

Button	Function
0-9	Number input
.	Decimal point
+, -, *, /	Basic arithmetic operators
=	Calculate result
C	Clear all (reset calculator)
CE	Clear current entry
<	Backspace (delete last digit)
sin, cos, tan	Trigonometric functions
asin, acos, atan	Inverse trigonometric functions
ln	Natural logarithm
log	Common logarithm (base 10)
sqrt	Square root
x^2	Square
x^y	Power
1/x	Reciprocal
x!	Factorial
exp	Exponential (e^x)
π	Pi constant
e	Euler's number
+/-	Change sign
Rad/Deg	Toggle angle mode

Troubleshooting

"Module not found: javafx.controls"

• Cause: JavaFX is not installed or not in the module path
• Solution: Download JavaFX SDK and specify the correct path with --module-path

"class file has wrong version" Error

• Cause: JavaFX version doesn't match your Java version
• Solution: Download compatible JavaFX version (see compatibility table above)

"Cannot find java command"

• Cause: Java is not installed or not in PATH
• Solution: Install JDK and add to system PATH

Calculator window doesn't appear

• Cause: JavaFX runtime modules not loaded
• Solution: Ensure --add-modules javafx.controls is specified when running

Error on button click

• Cause: Invalid input or operation
• Solution: Click C to clear and try again

Building from Source

Compile the source code:

javac --module-path /path/to/javafx-sdk/lib --add-modules javafx.controls ScientificCalculator.java

Run the application:

java --module-path /path/to/javafx-sdk/lib --add-modules javafx.controls ScientificCalculator

Windows Example:

javac --module-path "C:\javafx-sdk-17\lib" --add-modules javafx.controls ScientificCalculator.java
java --module-path "C:\javafx-sdk-17\lib" --add-modules javafx.controls ScientificCalculator

Linux/Mac Example:

javac --module-path /opt/javafx-sdk-17/lib --add-modules javafx.controls ScientificCalculator.java
java --module-path /opt/javafx-sdk-17/lib --add-modules javafx.controls ScientificCalculator

IDE Setup

IntelliJ IDEA

1. Open project in IntelliJ
2. File → Project Structure → Libraries
3. Add JavaFX SDK library
4. Run → Edit Configurations
5. Add VM options: --module-path /path/to/javafx-sdk/lib --add-modules javafx.controls

Eclipse

1. Open project in Eclipse
2. Right-click project → Properties → Java Build Path
3. Add External JARs from JavaFX SDK lib folder
4. Run → Run Configurations
5. Add VM arguments: --module-path /path/to/javafx-sdk/lib --add-modules javafx.controls

VS Code

1. Install Java Extension Pack
2. Create .vscode/launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "ScientificCalculator",
            "request": "launch",
            "mainClass": "ScientificCalculator",
            "vmArgs": "--module-path /path/to/javafx-sdk/lib --add-modules javafx.controls"
        }
    ]
}

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Future Enhancements

• Memory functions (M+, M-, MR, MC)
• Scientific notation input
• Parentheses support for complex expressions
• History of calculations
• Keyboard input support
• Theme customization
• Export/save results
• Unit conversions

License

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

Author

Your Name - Sahil Sharma

Project Link: https://github.com/Developer-Sahil/scientific-calculator

Acknowledgments

• Built with JavaFX
• Inspired by modern calculator designs
• Special thanks to the Java community

---

Note: This calculator is designed for educational purposes and basic scientific calculations. For advanced mathematical operations, consider using specialized software like MATLAB, Mathematica, or SciPy.