Question

How do I throw an exception such that it will output “Calculation failed, there is no change between x1 and x2” if my slope’s denominator is 0…The following block is a method within a class file.

public double getSlope() {
    double rise = p2.getY() - p1.getY();
    double run  = p2.getX() - p1.getX();
    double slope = rise / run;
    return slope;
}

I’m outputting the results to my Testing file, or driver class containing a main method.

Answer 1

if (run == 0) {
    throw new IllegalArgumentException("Divide by zero error");
}