C4LCUL4TOR is a simple, hacker-styled calculator application developed in Java using Swing for the graphical user interface.

• Basic arithmetic operations: addition, subtraction, multiplication, division
• Additional operations: exponentiation, modulo
• Retro/hacker-style green-on-black interface
• Error handling for syntax errors and division by zero
• I wonder what displays after inputting 69696969...?

• Java Development Kit (JDK) 8 or higher

1. Clone/download this repo then run Main

2. Download only the calculator_app.jar file and run this at the jar's directory:

   java -jar calculator_app.jar
   

The following coding conventions were used in the development of this application:

1. Naming Conventions:

   • Classes: PascalCase (e.g., Screen, Main)
   • Methods and variables: camelCase (e.g., createDisplay(), firstOperand)
   • Constants: UPPER_SNAKE_CASE (e.g., WINDOW_WIDTH, BG_COLOR)

2. Package Structure:

   • All classes are in the com.calcuapp package

3. Access Modifiers:

   • Classes are declared as public
   • The Screen class is declared as final to prevent inheritance
   • Fields are generally private unless needed otherwise
   • Constants are declared as private static final

4. Code Organization:

   • Related methods are grouped together (e.g., UI creation methods, calculation methods)
   • Constants are declared at the top of the class

5. Comments:

   • Single-line comments are used for brief explanations
   • Method-level comments are omitted in favor of self-explanatory method names

6. Error Handling:

   • Try-catch blocks are used for potential exceptions (e.g., NumberFormatException)
   • Custom error messages are displayed for syntax errors and division by zero

7. UI Design:

   • Consistent color scheme using predefined color constants
   • Uniform sizing and spacing of UI elements

8. Event Handling:

   • Lambda expressions are used for ActionListeners

9. Data Types:

   • Appropriate primitive types are used (e.g., double for operands, char for operators)

10. Method Design:

    • Methods are kept short and focused on a single responsibility
    • Private helper methods are used to break down complex operations

11. Constants:

    • Magic numbers and strings are avoided in favor of named constants

12. Serialization:

    • serialVersionUID is defined for the Screen class which extends JFrame

13. Null Handling:

    • Null checks are implicit through the use of the Swing framework

14. Resource Management:

    • Swing components are used, which handle resource management automatically

15. Formatting:

    • Consistent indentation (4 spaces)
    • Braces on the same line as control statements
    • Spaces around operators and after commas

These conventions contribute to the readability, maintainability, and consistency of the codebase.

• d-quint
• Xhinvier07
• Jccc07
• DSandhu12