JTable cell focus outline with row highlight

Question

With a JTable, when I click on a row, the row is highlighted and the cell clicked has a subtle outline showing which cell was clicked.
I would like to do that programatically. I can highlight the row, but I have not been able to get the subtle outline on the cell. My purpose is to point the user to the row and cell where a search found a match. I do not have cell selection enabled, because I want the whole row highlighted.
My basic code is:
table.changeSelection(irow, icol, false, false);
table.scrollRectToVisible(table.getCellRect(irow, icol, true));I keep thinking I just need to find a way to "set focus" to the cell so the subtle outline is displayed, but I cannot find something like that.
Does anyone have some ideas on how to activate that automatic outline on the cell? I prefer not to write custom cell renderers for this if possible.

Answer 1

That seems unnecessarily complicated, the outline is the focused cell highlight border so requesting focus on the table should be enough.
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class TestTableFocus {
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                final JTable table = new JTable(10, 10);
                JFrame frame = new JFrame("Test");
                frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                frame.getContentPane().add(new JScrollPane(table));
                frame.getContentPane().add(new JButton(
                  new AbstractAction("Focus cell") {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        table.changeSelection(5, 5, false, false);
                        centerCell(table, 5, 5);
                        table.requestFocusInWindow();
                    private void centerCell(JTable table, int x, int y) {
                        Rectangle visible = table.getVisibleRect();
                        Rectangle cell = table.getCellRect(x, y, true);
                        cell.grow((visible.width - cell.width) / 2,
                                (visible.height - cell.height) / 2);
                        table.scrollRectToVisible(cell);
                }), BorderLayout.PAGE_END);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
}