Question

I have a JTable and, inside its TableModel, I saved an int; this is the row index that I want my view to “keep in the middle” of the Viewport.
What I mean is that, for example, if I have 1000 rows, 10 are shown in the View at any time and my index is 500, I want my vieport to automatically show rows 495-504.
These rows are not necessarily selected.
I hope I was able to explain my problem properly.

Thank you

Answer 1

Assuming your row heights are the same,

int rowPosition = index - 10 / 2;
int pixelPosition = rowPosition * table.getRowHeight(rowPosition);
scrollPane.getViewPort().setViewPosition(new Point(0, pixelPosition));

If the row heights aren’t the same, you would have to sum all of the row heights from row 1 to row index – 5.