将jRadioButton添加到jTable中

我想将jRadioButton添加到jTable 。 我用了给定的代码

  private class CustomCellRenderer extends DefaultTableCellRenderer { /* (non-Javadoc) * @see javax.swing.table.DefaultTableCellRenderer#getTableCellRendererComponent(javax.swing.JTable, java.lang.Object, boolean, boolean, int, int) */ @Override public Component getTableCellRendererComponent(JTable table, Object value,boolean isSelected, boolean hasFocus, int row, int column) { return new javax.swing.JRadioButton(); } } 

但是当我运行这个时，我得到了不同颜色的jTable列，当我点击单选按钮时没有任何反应。 我正在使用netbeans。 如果我尝试自定义jTable那么jTable不会出现任何jTable 。 给我一个适当的指导。

Answer 1

1. 如果要编辑表格单元格的值，则必须设置TableCellEditor 。
2. 您应该在渲染器中创建一个JRadioButton并在任何地方重用它，这是TableCellRenderer的目的。
3. 如果您没有调用super.getTableCellRendererComponent ，则不需要扩展DefaultTableCellRenderer ，只需实现TableCellRenderer 。

考虑阅读JTable教程以更好地理解渲染器和编辑器的概念。

编辑：

这是一个如何使这项工作的例子。 当然，你必须适应你的模型，但你应该得到要点：

 import java.awt.BorderLayout; import java.awt.Component; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeSupport; import java.util.ArrayList; import java.util.List; import javax.swing.AbstractCellEditor; import javax.swing.JFrame; import javax.swing.JRadioButton; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.table.AbstractTableModel; import javax.swing.table.TableCellEditor; import javax.swing.table.TableCellRenderer; import javax.swing.table.TableColumn; public class TestTable { public class RadioButtonCellEditorRenderer extends AbstractCellEditor implements TableCellRenderer, TableCellEditor, ActionListener { private JRadioButton radioButton; public RadioButtonCellEditorRenderer() { this.radioButton = new JRadioButton(); radioButton.addActionListener(this); radioButton.setOpaque(false); } @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { radioButton.setSelected(Boolean.TRUE.equals(value)); return radioButton; } @Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { radioButton.setSelected(Boolean.TRUE.equals(value)); return radioButton; } @Override public void actionPerformed(ActionEvent e) { stopCellEditing(); } @Override public Object getCellEditorValue() { return radioButton.isSelected(); } } private JFrame f; private JTable table; private class MyObjectManager { private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this); private List objects = new ArrayList(); public void addObject(MyObject object) { objects.add(object); object.setManager(this); propertyChangeSupport.firePropertyChange("objects", null, object); } public List getObjects() { return objects; } public void setAsSelected(MyObject myObject) { for (MyObject o : objects) { o.setSelected(myObject == o); } } } private class MyObject { private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this); private MyObjectManager manager; private String value; private boolean selected; public MyObject(String value) { this.value = value; } public PropertyChangeSupport getPropertyChangeSupport() { return propertyChangeSupport; } public String getValue() { return value; } public void setValue(String value) { this.value = value; propertyChangeSupport.firePropertyChange("value", null, value); } public MyObjectManager getManager() { return manager; } public void setManager(MyObjectManager manager) { this.manager = manager; propertyChangeSupport.firePropertyChange("manager", null, manager); } public boolean isSelected() { return selected; } public void setSelected(boolean selected) { if (this.selected != selected) { this.selected = selected; if (selected) { manager.setAsSelected(this); } propertyChangeSupport.firePropertyChange("selected", !selected, selected); } } } protected void initUI() { MyObjectManager manager = new MyObjectManager(); for (int i = 0; i < 200; i++) { MyObject object = new MyObject("Row " + (i + 1)); manager.addObject(object); } table = new JTable(new MyTableModel(manager)); table.setRowHeight(20); TableColumn column = table.getColumnModel().getColumn(1); column.setCellEditor(new RadioButtonCellEditorRenderer()); column.setCellRenderer(new RadioButtonCellEditorRenderer()); f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(new JScrollPane(table), BorderLayout.CENTER); f.pack(); f.setVisible(true); } public class MyTableModel extends AbstractTableModel implements PropertyChangeListener { private final MyObjectManager manager; public MyTableModel(MyObjectManager manager) { super(); this.manager = manager; manager.propertyChangeSupport.addPropertyChangeListener(this); for (MyObject object : manager.getObjects()) { object.getPropertyChangeSupport().addPropertyChangeListener(this); } } @Override public void propertyChange(PropertyChangeEvent evt) { if (evt.getSource() == manager) { // OK, not the cleanest thing, just to get the gist of it. if (evt.getPropertyName().equals("objects")) { ((MyObject) evt.getNewValue()).getPropertyChangeSupport().addPropertyChangeListener(this); } fireTableDataChanged(); } else if (evt.getSource() instanceof MyObject) { int index = manager.getObjects().indexOf(evt.getSource()); fireTableRowsUpdated(index, index); } } @Override public int getColumnCount() { return 2; } @Override public int getRowCount() { return manager.getObjects().size(); } public MyObject getValueAt(int row) { return manager.getObjects().get(row); } @Override public Object getValueAt(int rowIndex, int columnIndex) { switch (columnIndex) { case 0: return getValueAt(rowIndex).getValue(); case 1: return getValueAt(rowIndex).isSelected(); } return null; } @Override public void setValueAt(Object value, int rowIndex, int columnIndex) { if (columnIndex == 1) { getValueAt(rowIndex).setSelected(Boolean.TRUE.equals(value)); } } @Override public boolean isCellEditable(int rowIndex, int columnIndex) { return columnIndex == 1; } @Override public Class getColumnClass(int column) { switch (column) { case 0: return String.class; case 1: return Boolean.class; } return Object.class; } @Override public String getColumnName(int column) { switch (column) { case 0: return "Value"; case 1: return "Selected"; } return null; } } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new TestTable().initUI(); } }); } } 

Answer 2

1. 建议不要在getTableCellRendererComponent方法中返回新组件。 相反，始终返回相同的组件，但根据值进行修改。 这是可能的，因为返回的组件仅用作“标记”而不是直接添加到Swing层次结构中。 请参阅教程中的“ 渲染器和编辑器”部分
2. 我在第一点中描述的内容解释了为什么你不能点击按钮。 它只是表格中存在的按钮图像，而不是真正的按钮

另外，请考虑使用JCheckbox而不是radiobutton。 在这种情况下，当TableModel包含boolean值时，您可以简单地粘贴到默认渲染器/编辑器