Moving a row in jTable

Question

How can one move a row in jTable so that row1 goes to row2's position and row2 goes to row1's position ?

Answer 1

Use the moveRow(...) method of the DefaultTableModel.

Or, if you aren't using the DefaultTableModel then implement a simliar method in your custom model.

Answer 2

Here is my code that I've just developed using the answer in this question. With those function you can select multiple rows at a time and move them down or up in a JTable. I've attached those function to JButton, but i clean them out to make them more readable.

The last code line of both method (setRowSelectionInterval()) is used to follow the selection on the row being moved, since moveRow() doesn't move the selection but the content of the row.

public void moveUpwards()
{
    moveRowBy(-1);
}

public void moveDownwards()
{
    moveRowBy(1);
}

private void moveRowBy(int by)
{
    DefaultTableModel model = (DefaultTableModel) table.getModel();
    int[] rows = table.getSelectedRows();
    int destination = rows[0] + by;
    int rowCount = model.getRowCount();

    if (destination < 0 || destination >= rowCount)
    {
        return;
    }

    model.moveRow(rows[0], rows[rows.length - 1], destination);
    table.setRowSelectionInterval(rows[0] + by, rows[rows.length - 1] + by);
}