Java JTable cancel table cell editing

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;


class MyDefaultTableModel extends DefaultTableModel {
   /*  w  w w  .java  2 s.c om*/

   public Class getColumnClass(int mColIndex) {
     int rowIndex = 0;
     Object o = getValueAt(rowIndex, mColIndex);
     if (o == null) {
       return Object.class;
     } else {
       return o.getClass();
     }
   }
 }
public class Main extends JPanel {
   public Main() {
      setLayout(new BorderLayout(5, 5));
      DefaultTableModel model = new MyDefaultTableModel();
      
      JTable table = new JTable(model);

      // Add data
      model.addColumn("Col1", new Object[] { Color.red });
      model.addRow(new Object[] { Color.green });
      model.addRow(new Object[] { Color.blue });


      cancelCellEditing(table);
      
      JScrollPane sp = new JScrollPane(table);

      add(sp, BorderLayout.CENTER);
   }
   public static void main(String[] args) {
      JFrame frame = new JFrame("java2s.com");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      Main m = new Main();
      frame.add(m);
      frame.setSize(300, 210);
      frame.setVisible(true);
   }
   
   public static void cancelCellEditing(JTable table) {
      if (table.isEditing()) {
          int[] selection = table.getSelectedRows();
          table.getCellEditor().cancelCellEditing();
          if (selection.length > 0) {
              selectRows(table, selection);
          }
      }
  }

  public static void selectRows(JTable table, int[] rowIndexes) {
      table.getSelectionModel().setValueIsAdjusting(true);
      try {
          table.clearSelection();
          for (int row : rowIndexes) {
              table.addRowSelectionInterval(row, row);
          }
          if (table.getCellSelectionEnabled()) {
              table.setColumnSelectionInterval(0,
                      table.getColumnCount() - 1);
          }
      } finally {
          table.getSelectionModel().setValueIsAdjusting(false);
      }
  }
}