private boolean newerVersionBigger(String newestVersion, String oldVersion){
		StringTokenizer newestToken = new StringTokenizer(newestVersion, ".");
		StringTokenizer oldToken = new StringTokenizer(oldVersion, ".");
		while(newestToken.hasMoreTokens()){
			int newest = Integer.parseInt( newestToken.nextToken());
			int oldest = 0;
			if(oldToken.hasMoreTokens()){
				//compare next tokens
				oldest = Integer.parseInt( oldToken.nextToken());
			}else{
				oldest = 0;
			}
			
			if(newest > oldest){
				return true;
			}
		}
		return false;
	}