private String getNumberFromBeginning(String string) {
		for (int i = 0; i < string.length(); i++) {
			if (!allNumberCharacters.contains("" + string.charAt(i))) {
				return string.substring(0, i);
			}
			if (i > 0 && (string.charAt(i) == '-' && !(string.charAt(i - 1) == 'E'))) {
				return string.substring(0, i);
			}
		}
		return string;
	}