Runner.java

package consoleConverter;

class BaseUninterpretableException extends Exception {
	public String getMessage() {
		return ("Base uninterpretable");
	}
}

public class Runner {
		
	public static int checkBase(String base) throws BaseUninterpretableException {
		try {
			return Integer.parseInt(base);
		} catch (NumberFormatException e) {
			throw new BaseUninterpretableException();
		}
	}
	
	public static void main(String[] args) {
		
		if(args.length != 3) {
			System.out.println("Error: Three arguments expected");
			System.exit(1);
		}
		
		try {
			String number = args[0];
			int baseFrom = checkBase(args[1]);
			int baseTo = checkBase(args[2]);
			Converter converter = new Converter(number, baseFrom, baseTo);
			System.out.println(converter.convertBase());
		} catch (BaseUninterpretableException e) {
			System.out.println("Exception: " + e.getMessage());
			System.exit(1);			
		} catch (NumberUninterpretableException e) {
			System.out.println("Exception: " + e.getMessage());
			System.exit(2);
		} catch (BaseOutOfBoundException e) {
			System.out.println("Exception: " + e.getMessage());
			System.exit(3);
		}
	}
	
}