@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 = Integer.class;
				break;
			case 3:
				type = Double.class;
				break;
			case 4:
				type = Double.class;
				break;
	
		}
		return type;		
	}