compare version of ver1 and ver2

compareVersion

	/**
	 * compare version of ver1 and ver2 
	 * 
	 * @param ver1
	 * @param ver2
	 * @return 
	 *   0: when ver1 equals ver2 <br>
	 *   1: when ver1 Minor or Patch version less than ver2  <br>
	 *   2: when ver1 Major version less than ver2 <br>
	 */
	public static int compareVersion(String ver1, String ver2) {
		int i = 0;

		// support Semantic Versioning
		String regex = "(\\w+)\\.(\\w+)\\.(\\w+)(.*)";
		Matcher m1 = Pattern.compile(regex).matcher(ver1);
		Matcher m2 = Pattern.compile(regex).matcher(ver2);

		if (m1.matches() && m2.matches()) {
			int i1 = m2.group(1).compareToIgnoreCase(m1.group(1));
			int i2 = m2.group(2).compareToIgnoreCase(m1.group(2));
			int i3 = m2.group(3).compareToIgnoreCase(m1.group(3));

			if (i1 >= 1)
				i = 2;
			if (i1 == 0 && i2 >= 1)
				i = 1;
			if (i1 == 0 && i2 == 0 && i3 >= 1)
				i = 1;

		}
		return i;

	}