public ArrayList<String> convertHexNumber(int number, ArrayList<String> hexNumber){
		if(number < 10){
			hexNumber.add(Integer.toString(number));
			return hexNumber;
		}else{
			switch(number){
			case 10:
				hexNumber.add("a");
				return hexNumber;
			case 11:
				hexNumber.add("b");
				return hexNumber;
			case 12:
				hexNumber.add("c");
				return hexNumber;
			case 13:
				hexNumber.add("d");
				return hexNumber;
			case 14:
				hexNumber.add("e");
				return hexNumber;
			case 15:
				hexNumber.add("f");
				return hexNumber;
			default:
				return hexNumber;
			}
		}
	}