🧮 Java Calculator (Swing + AWT)

A simple calculator application built in Java using Swing and AWT for the graphical user interface. This calculator mimics the functionality of a basic physical calculator and supports standard arithmetic operations.

---

📸 Screenshot

🚀 Features

• Addition, Subtraction, Multiplication, Division
• Square root calculation
• Percentage operation
• Positive/Negative toggle (+/-)
• Clear button (AC)
• Decimal support

---

🛠️ Tech Stack

• Java 8 or higher
• Swing
• AWT

---

🧠 How It Works

• The calculator GUI is built with JFrame, JPanel, JButton, and JLabel.
• All button events are handled using ActionListener.
• Input is taken via number and operator buttons.
• Upon pressing =, the selected operation is performed using the stored operands and operator.
• The result is displayed with formatting (e.g., whole numbers shown without .0).

---

▶️ How to Run

1. Clone the repository or download the code.
2. Navigate to the project folder.
3. Compile the Java file:

javac Calculator.java

4. Run the program:

java Calculator

---

📌 Example Usage

• Enter 12, press +, then 8, then =, and you’ll get 20.
• Press √, enter a number like 25, then =, and it will return 5.
• Use % to find percentages, and +/- to toggle the sign.

---

⚠️ Known Limitations

• Code uses == instead of .equals() for string comparisons (not recommended in Java).
• Square root function only works in a specific input sequence.
• No error handling for divide-by-zero or malformed inputs yet.

---

📈 Future Improvements

• Replace == with .equals() for correct string comparison.
• Add memory functions (M+, M-, MR).
• Improve layout responsiveness for different window sizes.
• Add unit tests for arithmetic operations.

---

📝 License

This project is open-source and available under the

---

👨‍💻 Author

Developed by \T S BHUVANESHWAR. Contributions and suggestions are welcome!