Here is a proposed workaround for 4 java-scanner bugs. It works by extending the jar tool recognizing this situation, and adding the missing .class files to the jar command line, so the end result is ...

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 ...

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 ...