单击复选框后，如何使 JTable 上的复选框不可编辑？

Question

我创建了一个有 4 列的 JTable，最后两列是 JCheckBoxes。单击第二列上的复选框后，我想禁用第三列中的复选框，反之亦然。

 public class TableTest {

  public static void main(String[] args) {
    new TableTest();
    }

   public TableTest() {
     startUI();
   }

  public void startUI() {
    EventQueue.invokeLater(new Runnable() {
      @Override
      public void run() {
        try {
        
     UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (ClassNotFoundException | InstantiationException | 
     IllegalAccessException | UnsupportedLookAndFeelException ex) {
      ex.printStackTrace();
    }

    MyTableModel model = new MyTableModel();
     try {  
                        Class.forName("com.mysql.jdbc.Driver");
                        String url = "jdbc:mysql://localhost/survey";
                        Connection conn = 
       DriverManager.getConnection(url,"root","");
                        Statement stat = conn.createStatement();

                        ResultSet rslt=stat.executeQuery("SELECT * FROM 
          questions_edit");
                        while(rslt.next())
                {
                         String d = rslt.getString("question_no.");
                         String e = rslt.getString("question");
                         
                         model.addRow(new Object[]{d,e, false, false});
          }
                         
        
        }catch(SQLException e){
                            e.printStackTrace();
                    }catch(ClassNotFoundException e){
                            e.printStackTrace();
                } 
     JTable table = new JTable();
                table.setModel(model);

    JFrame frame = new JFrame("Testing");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(new JScrollPane(table));
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
       }
         });
      }

           public class MyTableModel extends DefaultTableModel {

          public MyTableModel() {
       super(new String[]{"Question No.", "Question", "Satisfied", "Not 
           Satisfied"}, 0);
           }

           @Override
           public Class<?> getColumnClass(int columnIndex) {
             Class cls = String.class;
        switch (columnIndex) {
              case 0:
            cls = Integer.class;
          break;
          case 2:
       cls = Boolean.class;
       break;
       case 3:
      cls = Boolean.class;
      break;
      }
       return cls;
         }

@Override
public boolean isCellEditable(int row, int column) {
  switch (column) {
     case 2: return true;
    
     case 3: return true;
           
     
 }
 return false;
}

@Override
public void setValueAt(Object aValue, int row, int column) {
  if (aValue instanceof Boolean && column == 2) {
    System.out.println(aValue);
    Vector rowData = (Vector)getDataVector().get(row);
    rowData.set(2, (boolean)aValue);
    fireTableCellUpdated(row, column);
  }
  else if (aValue instanceof Boolean && column == 3) {
    System.out.println(aValue);
    Vector rowData = (Vector)getDataVector().get(row);
    rowData.set(3, (boolean)aValue);
    fireTableCellUpdated(row, column);
      
      }
       }

      }

      }

这是我到目前为止所做的，但第 2 列和第 3 列都是可编辑的。 请帮忙。谢谢。

Answer 1

但第 2 列和第 3 列都是可编辑的。

嗯，这就是您的 isCellEditable(...) 方法所声明的。

如果您不希望第 3 列可编辑，那么您需要修改您的代码。可能是这样的：

case 3:
    Boolean column2 = (Boolean)getValueAt(row, 2)
    return ! column2.booleanValue();