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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

Screenshot 2024-05-14 at 1 44 56 PM

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.