У меня есть код , который при запуске генерирует таблицу в форме свинга, которая содержит набор флажков, которые можно выбрать или не выбирать
Когда я нажимаю на вкладку «Проверить все», явозможность установить / снять все остальные флажки ниже, но когда я выбираю один из следующих флажков индивидуально, я получаю эту ошибку:
> 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)
код :
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()......");
}
}
с исключением
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException:
javax.swing.JTable cannot be cast to javax.swing.table.JTableHeader