This is a simple console-based calculator developed using Java. It performs basic operations like addition, subtraction, multiplication, and division with user input via the Scanner class. Completed ...

This is a basic calculator program I created using Java. It runs in the terminal and allows users to perform simple arithmetic operations like addition, subtraction, multiplication, and division.

That's saying that the java.util.Scanner constructor is marked as being able to throw the exception java.io.FileNotFoundException - you either need to wrap that in a try/catch or mark your function as ...