Java：为什么JTable不使用TableCellEditor？

MyTableCellEditor的目的是使JTable单元的行为类似于Excel单元格IOW,单击单元格后输入一个值,而不是附加到现有值.
我没想到下面的代码会在第一次传递时工作,但我确实希望在getTableCellEditorComponent和getCellEditorValue中遇到调试断点.
当我使用jTable时,为什么不调用getTableCellEditorComponent或getCellEditorValue？

public class MyTable extends javax.swing.JFrame implements TableModelListener {
    private static final MyTableCellEditor tableCellEditor =
        new MyTableCellEditor();
        ...
    public MyTable() {
        initComponents();
        jTable.getModel().addTableModelListener(MyTable.this);
        ...
    private void initComponents() { // Generated by the Form Editor.
        jTable = new javax.swing.JTable();
        jTable.setCellEditor(tableCellEditor);
        ...
public class MyTableCellEditor extends AbstractCellEditor implements
        TableCellEditor {
    JComponent component = new JTextField();
    public Component getTableCellEditorComponent(JTable table,Object value,boolean isSelected,int rowIndex,int vColIndex) {
        if (isSelected) {
            ((JTextField)component).selectAll();
        }
        ((JTextField)component).setText((String)value);
        return component;
    }
    public Object getCellEditorValue() {
        return ((JTextField)component).getText();
    }
}

jTable.setDefaultEditor(String.class,tableCellEditor);

jTable.getColumnModel().getColumn(1).setCellEditor(tableCellEditor);