this.setColumnCount(oldColumnCount - 1);
	public void removeColumn(int columnIndex) {		int oldColumnCount = getColumnCount();		//On retire toutes les valeurs de la colonne columnIndex		for (int row = 0; row < getColumnCount(); row++) {			Vector rowVector = (Vector) dataVector.elementAt(row);			rowVector.removeElementAt(columnIndex);		}		this.setColumnCount(oldColumnCount - 1);	}