Java Calculator

A desktop calculator application built with Java Swing.

Features

• Basic arithmetic operations (addition, subtraction, multiplication, division)
• Percentage calculation
• Sign toggle (+/-)
• Backspace
• Divide by zero error handling
• Dark theme with styled round buttons

Technologies Used

• Java
• Swing (GUI)

How to Run

1. Clone the repository
2. Open the project in NetBeans (or any Java IDE)
3. Run CalculatorUi.java

What I Learned

• Building GUIs with Java Swing
• Separation of concerns using OOP
• Event listeners and lambda expressions
• Git version control workflow