JList keep heighlight after focus is lost

Question

How to keep highlight (selected item) after focus on JList is lost.

setSelectedIndex didnt reselect the item after focus lost.

list.addFocusListener(new FocusListener() {
            @Override
            public void focusLost(FocusEvent var1) {
                if (index != -1) { 
                   list.setSelectedIndex(index); 
                }
            }
            @Override
            public void focusGained(FocusEvent var1) {}
            
        });

Solution:

public class SelectedListCellRenderer extends DefaultListCellRenderer {
        private static final long serialVersionUID = 1L;

        @Override
        public Component getListCellRendererComponent(JList<?> list, Object file, int index, boolean isSelected, boolean cellHasFocus) {
            if (index == lastIndex && lostFocus) {
                cellHasFocus = true;
            } 
            return super.getListCellRendererComponent(list, file, index, isSelected, cellHasFocus);
        }
    }

Then add it to JList:

list.setCellRenderer(new SelectedListCellRenderer());
list.addFocusListener(new FocusListener() {
                        @Override
                        public void focusLost(FocusEvent var1) {
                            if (lastIndex != -1) {
                                lostFocus = true;
                            }
                        } 
                        @Override
                        public void focusGained(FocusEvent var1) {
                            lostFocus = false;
                            repaint();
                        }
                    });