public class Calculator {
    public static int add(int a, int b) {
        return a + b;
    }
}

1. What is This Java Code?

This is a simple Java class that implements a basic addition calculator. The Calculator class contains a static method 'add' that takes two integer parameters and returns their sum.

2. How Does the Calculator Work?

The code works by:

• Defining a public Calculator class
• Creating a static add method that takes two integers
• Returning the sum of the two integers using the + operator

3. Usage Example

To use this calculator:

int result = Calculator.add(5, 3);  // result will be 8

4. Frequently Asked Questions (FAQ)

Q1: Can this handle decimal numbers?
A: No, this version only works with integers. For decimals, you would need to use double or float data types.

Q2: How would I extend this to other operations?
A: You could add similar methods for subtraction, multiplication, etc.

Q3: Why is the method static?
A: Making it static allows calling the method without creating an instance of the Calculator class.

Q4: What are the limitations?
A: This simple version doesn't handle overflow cases or non-integer inputs.