如何从JTable获取选定的RadioButton

Question

我正在编程，我需要从Jtable获取选定的广播按钮

我找到了一个我正在研究的例子

有课

第一：

  import java.awt.Component;
  import java.awt.event.ItemEvent;
  import java.awt.event.ItemListener;

 import javax.swing.DefaultCellEditor;
 import javax.swing.JCheckBox;
 import javax.swing.JRadioButton;
 import javax.swing.JTable;
 import javax.swing.table.TableCellRenderer;

 class RadioButtonRenderer implements TableCellRenderer {
   public Component getTableCellRendererComponent(JTable table, Object value,
       boolean isSelected, boolean hasFocus, int row, int column) {
     if (value == null)
       return null;
     return (Component) value;
   }
 }

 class RadioButtonEditor extends DefaultCellEditor implements ItemListener {
   /**
     * 
      */
     private static final long serialVersionUID = 1L;
 private JRadioButton button;

   public RadioButtonEditor(JCheckBox checkBox) {
     super(checkBox);
   }

   public Component getTableCellEditorComponent(JTable table, Object value,
       boolean isSelected, int row, int column) {
     if (value == null)
       return null;
     button = (JRadioButton) value;
     button.addItemListener(this);
          return (Component) value;
   }

   public Object getCellEditorValue() {
     button.removeItemListener(this);
     return button;
   }

   public void itemStateChanged(ItemEvent e) {
     super.fireEditingStopped();
   }
 }

第二类是：

     package TP2;
     import java.awt.event.ActionEvent;
              import java.awt.event.ActionListener;
     import java.awt.event.ItemEvent;

     import javax.swing.ButtonGroup;
     import javax.swing.ButtonModel;
     import javax.swing.JButton;
     import javax.swing.JCheckBox;
     import javax.swing.JFrame;
     import javax.swing.JPanel;
     import javax.swing.JRadioButton;
     import javax.swing.JScrollPane;
     import javax.swing.JTable;
     import javax.swing.JToggleButton;
     import javax.swing.event.TableModelEvent;
     import javax.swing.table.DefaultTableModel;

     import net.miginfocom.swing.MigLayout;

     public class tablesDesEtudiants extends JFrame {

           public tablesDesEtudiants(Object[][] objt) {
             super("List des etudiants");

           //  UIDefaults ui = UIManager.getLookAndFeel().getDefaults();

            // UIManager.put("RadioButton.focus", ui.getColor("control"));

             DefaultTableModel dm = new DefaultTableModel();
             dm.setDataVector(objt , new Object[]                           {"Nom","Prénom","Année","Succs","Type","Select"});

             JTable table = new JTable(dm) {
               public void tableChanged(TableModelEvent e) {
                 super.tableChanged(e);
                 repaint();
      }
    };
    final ButtonGroup group1 = new ButtonGroup();
    for(int i =0 ; i<objt.length;i++){
    if(objt[i][1]!=null)

        group1.add((JRadioButton) dm.getValueAt(i, 5));
    }
   // System.out.println(objt.length);

    table.getColumn("Select").setCellRenderer(new RadioButtonRenderer());
    table.getColumn("Select").setCellRenderer(new RadioButtonRenderer());
    table.getColumn("Select").setCellRenderer(new RadioButtonRenderer());
    table.getColumn("Select").setCellRenderer(new RadioButtonRenderer());
    table.getColumn("Select").setCellRenderer(new RadioButtonRenderer());
    table.getColumn("Select").setCellEditor(new RadioButtonEditor(new JCheckBox()));




   JScrollPane scroll = new JScrollPane(table);

   JButton bView = new JButton("View");
   bView.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {


            ButtonModel choix   = group1.getSelection();
            if (choix != null) {

            System.out.println( choix.getActionCommand());
                            }
            else System.out.println("nullll");
        }
    });


   JPanel  pp =new JPanel();
   MigLayout layout = new MigLayout(

          "",           // Layout Constraints
          "[][]20[]",   // Column constraints
          "[]20[]");    // Row constraint


      pp.setLayout(layout);
      pp.add(scroll,"cell 1 2");

      pp.add(bView,"cell 2 3");
   getContentPane().add(pp);


    setSize(600, 400);
    setVisible(true);


  }


 /* public static void main(String[] args) {
    JRadioButtonTableExample frame = new JRadioButtonTableExample();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
  }*/
}

在第二类中，我试图像这样在ButtonGroup上添加所有单选按钮：

   final ButtonGroup group1 = new ButtonGroup();
    for(int i =0 ; i<objt.length;i++){
    if(objt[i][1]!=null)

        group1.add((JRadioButton) dm.getValueAt(i, 5));
    }

我的问题是我无法选择RadioButton：

         ButtonModel choix  = group1.getSelection();
            if (choix != null) {

            System.out.println( choix.getActionCommand());
                            }
            else System.out.println("nullll");
        }

我总是空着

任何帮助请！

Answer 1

阅读我对这个问题的回答 。 您不应该将组件存储在表中。 存储布尔值。 然后，您应该配置一个渲染器以将布尔值显示为单选按钮，并配置一个编辑器以更改选中的单元格的值以及先前选中的单元格的值。 并了解到，渲染器的相同实例用于渲染/编辑同一类的所有单元格。

Answer 2

• 我认为这并不容易， ButtonGroup中用于JRadioButtons的 TableCellEditor

• 如果可能，使用JCheckBox

• 如果可能，请使用JComboBox作为TableCellEditor而不是ButtonGroup的JRadioButtons ，对于TableCellRenderer，可以在ButtonGroup使用JRadioButtons