@Override
	public Object getValueAt(int row, int col) {
		switch (col) {
		case 0:
			return data.elementAt(row)[0];
		case 1:
			return data.elementAt(row)[1];
		case 2:
			return data.elementAt(row)[2];
		case 3:
			return data.elementAt(row)[3];
		}
		throw new IllegalArgumentException(
				"Cannot retrieve from selected field");
	}