public UserInterface() {
		super("WEBCRAWLER");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		
		Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();
		
		setBounds(center.x - (FRAME_WIDTH / 2), center.y - (FRAME_HEIGHT / 2), center.x, center.y);
		setResizable(false);

		my_list_of_ave = new ArrayList<Double>();
		my_list_of_total = new ArrayList<Integer>();

		my_keywords_list = new ArrayList<String>();

	}