public final class StringUtil {

	private StringUtil() { }

	/**
	 * @param s
	 * @return If the provided String only contains numerical characters
	 */
	public static boolean isNumerical(String s) {
		for (int i = 0; i < s.length(); i++) {
			int val = s.charAt(i);
			if (val < '0' || val > '9') {
				return false;
			}
		}

		return true;
	}

	/**
	 * @param s
	 * @return If the provided String contains any numerical characters
	 */
	public static boolean hasNumber(String s) {
		for (int i = 0; i < s.length(); i++) {
			int val = s.charAt(i);
			if (val >= '0' && val <= '9') {
				return true;
			}
		}

		return false;
	}

}