@Override
	public Class<?> getColumnClass(int columnIndex){
		Class type = String.class;
		switch (columnIndex){
		case 0:
			type = Integer.class;
			break;
		case 1:
			type = String.class;
			break;
		case 2:
			type = Double.class;
			break;
		case 3:
			type = Double.class;
			break;
		case 4:
			type = Double.class;
			break;
		}
		return type;		
	}