Converter.java

package consoleConverter;

class BaseOutOfBoundException extends Exception {
	public String getMessage() {
		return ("Base out of bound");
	}
}

class NumberUninterpretableException extends Exception {
	public String getMessage() {
		return ("Number uninterpretable");
	}
}

public class Converter {
	
	private String number;
	private int baseFrom;
	private int baseTo;
	
	public Converter(String number, int baseFrom, int baseTo) {
		this.number = number;
		this.baseFrom = baseFrom;
		this.baseTo = baseTo;
	}
	
	public String convertBase() throws BaseOutOfBoundException, NumberUninterpretableException 
	{
		if (2 > this.baseFrom || this.baseFrom > 16 || 2 > this.baseTo || this.baseTo > 16) {
			throw new BaseOutOfBoundException();
		}		
		try {
			return Integer.toString(Integer.parseInt(this.number, this.baseFrom),this.baseTo);
		} catch (NumberFormatException e) {
			throw new NumberUninterpretableException();
		}
	}

}