public void mouseMoved(MouseEvent e) {

				int index = jListingPanelList.locationToIndex(e.getPoint());
				Rectangle rectangle = jListingPanelList.getCellBounds(index,
						index);
				if (rectangle != null && index >= 0
						&& index < jListingPanelList.getModel().getSize()
						&& rectangle.contains(e.getPoint())) {

					String execName = ((DefaultListModel<String>) jListingPanelList
							.getModel()).elementAt(index);
					for (Operation op : operations)
						if (op.getName().equals(execName)) {

							if (!op.getDesc().isEmpty())
								// setez Tool Tip cu descrierea executabilului
								jListingPanelList.setToolTipText(op.getDesc());
						}
				} else {

					jListingPanelList.setToolTipText(null);
				}
			}