Calculator

This repository contains a simple calculator application implemented in Java using JavaFX. The calculator provides basic arithmetic operations and a user-friendly interface.

Features

• Basic Arithmetic Operations: Supports addition, subtraction, multiplication, and division.
• User-Friendly Interface: Intuitive and easy-to-use interface with buttons for digits and operations.
• Clear Function: Ability to clear the current input.
• Error Handling: Displays an error message for invalid expressions.

Screenshots

Usage

1. Clone the Repository:

   git clone https://github.com/Himanshu-Khadka/CalculatorInJava.git

2. Navigate to the Project Directory:

   cd src/main/java/himanshukhadka/calculator

3. Compile and Run the Application: Make sure you have Java and JavaFX installed. Compile and run the application using your preferred IDE or command line.

   To compile:

   javac -d bin -sourcepath src src/main/java/himanshukhadka/calculator

   To run:

   java -cp bin himanshukhadka.calculator.Calculator

Code Overview

Main Class: Calculator

• TextField display: A text field to display the current input and result.
• start(Stage primaryStage): Sets up the user interface with a grid of buttons and a display area.
• buttonClicked(String text): Handles button click events.
  • Clears the display when "C" is clicked.
  • Evaluates the expression when "=" is clicked.
  • Appends the clicked button text to the display for other buttons.
• evaluate(): Evaluates the mathematical expression entered in the display.
• eval(String str): A method to evaluate the given mathematical expression using a custom parser.

Contributing

Contributions are welcome! Feel free to open issues or submit pull requests.