How to do JTable on cellchange select all text

Question

i have seen some example of doing it but i still can\'t understand and not able to implement it.

What i want to do is on cell change (focus), the next selected cell

Answer 1

regarding editorComponent, where do I initialize this variable?

The variable editorComponent is a field of DefaultCellEditor.

Instead of

class CellEditor extends JTextField implements TableCellEditor

consider

class CellEditor extends DefaultCellEditor

Then you can do something like this:

@Override
public Component getTableCellEditorComponent(JTable table,
        Object value, boolean isSelected, int row, int column) {
    JTextField ec = (JTextField) editorComponent;
    if (isSelected) {
        ec.selectAll();
    }
    return editorComponent;
}

Addendum: As suggested by @Edoz and illustrated in this complete example, you can selectively re-queue the selectAll() when a mouse-click initiates editing.

JTable table = new JTable(model) {

    @Override // Always selectAll()
    public boolean editCellAt(int row, int column, EventObject e) {
        boolean result = super.editCellAt(row, column, e);
        final Component editor = getEditorComponent();
        if (editor == null || !(editor instanceof JTextComponent)) {
            return result;
        }
        if (e instanceof MouseEvent) {
            EventQueue.invokeLater(() -> {
                ((JTextComponent) editor).selectAll();
            });
        } else {
            ((JTextComponent) editor).selectAll();
        }
        return result;
    }
};