Eu tenho umcódig que, quando executado, gera uma tabela em forma de balanço que contém um conjunto de caixas de seleção que podem ser marcadas ou desmarcad

Quando clico na guia Verificar tudo, posso marcar / desmarcar todas as outras caixas de seleção abaixo, mas quando seleciono uma das caixas de seleção abaixo individualmente, recebo este erro:

> Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JTable
    at com.tps.charts.CheckBoxHeader.handleClickEvent(JTableHeaderCheckBox.java:152)
    at com.tps.charts.CheckBoxHeader.mouseClicked(JTableHeaderCheckBox.java:168)
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source) mousePressed......
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
    at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

Ocódig:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

public class JTableHeaderCheckBox {

    private Object colNames[] = {"", "String", "String"};
    private Object[][] data = {};
    private DefaultTableModel dtm;
    private JTable table;
    private TableColumn tc;

    public void buildGUI() {
        dtm = new DefaultTableModel(data, colNames);
        table = new JTable(dtm);
        for (int x = 0; x < 5; x++) {
            dtm.addRow(new Object[]{false, "Row " + (x + 1) + " Col 2", "Row " + (x + 1) + " Col 3"});
        }
        JScrollPane sp = new JScrollPane(table);
        tc = table.getColumnModel().getColumn(0);
        tc.setCellEditor(table.getDefaultEditor(Boolean.class));
        tc.setCellRenderer(table.getDefaultRenderer(Boolean.class));
        tc.setHeaderRenderer(new CheckBoxHeader(new MyItemListener()));
        JFrame f = new JFrame();
        f.getContentPane().add(sp);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }

    private class MyItemListener implements ItemListener {

        @Override
        public void itemStateChanged(ItemEvent e) {
            System.out.println("ItemStateChanged");
            Object source = e.getSource();
            if (source instanceof AbstractButton == false) {
                return;
            }
            boolean checked = e.getStateChange() == ItemEvent.SELECTED;
            for (int x = 0, y = table.getRowCount(); x < y; x++) {
                table.setValueAt(checked, x, 0);
            }
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new JTableHeaderCheckBox().buildGUI();
            }
        });
    }
}

class CheckBoxHeader extends JCheckBox implements TableCellRenderer, MouseListener {

    private static final long serialVersionUID = 1L;
    private CheckBoxHeader rendererComponent;
    private int column;
    private boolean mousePressed = false;

    public CheckBoxHeader(ItemListener itemListener) {
        rendererComponent = this;
        rendererComponent.addItemListener(itemListener);
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        if (table != null) {
            JTableHeader header = table.getTableHeader();
            table.addMouseListener(rendererComponent);
            if (header != null) {
                rendererComponent.setForeground(header.getForeground());
                rendererComponent.setBackground(header.getBackground());
                rendererComponent.setFont(header.getFont());
                header.addMouseListener(rendererComponent);
            }
        }
        setColumn(column);
        rendererComponent.setText("Check All");
        setBorder(UIManager.getBorder("TableHeader.cellBorder"));
        return rendererComponent;
    }

    protected void setColumn(int column) {
        this.column = column;
    }

    public int getColumn() {
        return column;
    }

    protected void handleClickEvent(MouseEvent e) {
        if (mousePressed) {
            mousePressed = false;
            JTableHeader header = (JTableHeader) (e.getSource());
            JTable tableView = header.getTable();
            TableColumnModel columnModel = tableView.getColumnModel();
            int viewColumn = columnModel.getColumnIndexAtX(e.getX());
            column = tableView.convertColumnIndexToModel(viewColumn);
            if (viewColumn == this.column && e.getClickCount() == 1 && column != -1) {
                System.out.println(" doClick()......");
                doClick();
            }
        }
    }

    @Override
    public void mouseClicked(MouseEvent e) {
        System.out.println(" mouseClicked()......");
        handleClickEvent(e);
        /* problem occurs from this line */
        ((JTableHeader) e.getSource()).repaint();
    }

    @Override
    public void mousePressed(MouseEvent e) {
        //System.out.println("mousePressed(MouseEvent e).......");
        mousePressed = true;
    }

    @Override
    public void mouseReleased(MouseEvent e) {
        //System.out.println(" mouseReleased()......");
    }

    @Override
    public void mouseEntered(MouseEvent e) {
        //System.out.println(" mouseEntered()......");
    }

    @Override
    public void mouseExited(MouseEvent e) {
        //System.out.println("mouseExited()......");
    }
}

com exceçã

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: 
javax.swing.JTable cannot be cast to javax.swing.table.JTableHeader