public double inputToDouble() {
		double inputValue = 0;
		while (true) {
			try {
				inputValue = Double.valueOf(this.in.next().trim());
				break;
			} catch (NumberFormatException e) {
				System.out.println("That wasn't a double value");
				this.in.nextLine();
			} catch (InputMismatchException e) {
				System.out.println("That wasn't a double value");
				this.in.nextLine();
			}
		}
		return inputValue;
	}