I need to cancel all selections within a JTable model object. Java provides this function "clearSelection()" which does, what I need, as far as I understand.
But I am confused why this function can be called on a JTable object as well as on a selection model for a JTable object:
1) mytable.clearSelection();
2) mytable.getSelectionModel().clearSelection();
Both ways work, but I do not understand in what situation a clearSelection() of a SelectionModel (like at 2) ) would make any sense. As far as I understood SelectionModels, they are used to decide what kind of selections a JTable allows. I use the SelectionModel to only allow a Selection of exactly one row
//allow only one row to be selected
mytable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
Which way is to be preferred in what kind of situation? Is there a good reason not to use way 1?
I would be glad if anyone has some beginner friendly explanation for that. Thx in advance.
Here is the implementation of JTable#clearSelection()
public void clearSelection() {
selectionModel.clearSelection();
columnModel.getSelectionModel().clearSelection();
}
As you can see, there is two ListSelectionModel which are cleared, because you can select column and/or row and/or cell.
From Oracle tutorial :
JTable uses a very simple concept of selection, managed as an intersection of rows and columns. It was not designed to handle fully independent cell selections.
A ListSelectionModel handle all aspect of the selection such as which row is selected, how can we select some rows, etc... Not only the kind of selection !
More information in the Oracle JTable tutorial