public static int compareVersion(String version1, String version2) {
		if (version1.equals(version2)) {
			return 0;
		}
		
		String[] version1Array = version1.split("\\.");
		String[] version2Array = version2.split("\\.");
		
		int index = 0;
		int minLen = Math.min(version1Array.length, version2Array.length);
		int diff = 0;
		
		while (index < minLen && (diff = Integer.parseInt(version1Array[index]) - Integer.parseInt(version2Array[index])) == 0) {
			index ++;
		}
		
		if (diff == 0) {
			for (int i = index; i < version1Array.length; i ++) {
				if (Integer.parseInt(version1Array[i]) > 0) {
					return 1;
				}
			}
			
			for (int i = index; i < version2Array.length; i ++) {
				if (Integer.parseInt(version2Array[i]) > 0) {
					return -1;
				}
			}
			
			return 0;
		} else {
			return diff > 0 ? 1 : -1;
		}
	}