如何在"JTable"列中仅使一个复选框处于选中状态 [英] How to make only one checkbox selectable in JTable Column

问题描述

我正在使用DefaultTableModel，如下所示:

I am using DefaultTableModel as follows:

  DefaultTableModel model = new DefaultTableModel (COLUMNS, 0 )
  {
      @Override
      public boolean isCellEditable(int row, int column)
      {
          return (getColumnName(column).equals("Selected"));
      }

      public Class getColumnClass(int columnIndex)
      {
          if(getColumnName(columnIndex).equals("Selected"))
              return Boolean.class;
          return super.getColumnClass(columnIndex);
      }     
  };

现在，我只想在选定"列中选择一个复选框.如何才能做到这一点.我也尝试了以下方法，但不起作用.

Now I want to make only one checkbox selectable in the column "Selected". How can this be done. I have tried following method also but its not working.

 public void fireTableCellUpdated(int row,int column)
 {
     if(getColumnName(column).equals("Selected"))
     {
         for(int i = 0; i<getRowCount() && i!=row;i++)
            setValueAt(Boolean.FALSE, row, column);
     }
 }

推荐答案

• @eatSleepCode写道@mKorbel能否请您给出实现setValueAt方法的示例代码.

  • @eatSleepCode wrote @mKorbel can you please give example code for implementing setValueAt method.

    (使用OP的)DefaultTableModel代码，

    code for (OP used) DefaultTableModel,

    用于基于AbstractTableModel的代码来保存通知程序fireTableCellUpdated(rowIndex, columnIndex);的代码顺序，因为/否则在JTables view中不会重绘任何内容，

    for code based on AbstractTableModel is required to hold code ordering for notifier fireTableCellUpdated(rowIndex, columnIndex);, because/otherwise nothing will be repainted in JTables view,

    这两个模型及其通知者之间有一些重要的区别，而且(我认为)没有理由为基本内容(99pct的表模型)而烦恼并使用AbstractTableModel p>

  there are a few important differencies betweens those two models and its notifiers, and (my view) there isn't reason to bothering with and to use AbstractTableModel for basic stuff (99pct of table models)

  . . . . . . . .

  . . . . . . . .

  import javax.swing.JFrame;
  import javax.swing.JScrollPane;
  import javax.swing.JTable;
  import javax.swing.SwingUtilities;
  import javax.swing.table.DefaultTableModel;
  
  public class TableRolloverDemo {
  
      private JFrame frame = new JFrame("TableRolloverDemo");
      private JTable table = new JTable();
      private String[] columnNames = new String[]{"Column"};
      private Object[][] data = new Object[][]{{false}, {false}, {true}, {true},
          {false}, {false}, {true}, {true}, {false}, {false}, {true}, {true}};
  
      public TableRolloverDemo() {
          final DefaultTableModel model = new DefaultTableModel(data, columnNames) {
              private boolean ImInLoop = false;
  
              @Override
              public Class<?> getColumnClass(int columnIndex) {
                  return Boolean.class;
              }
  
              @Override
              public boolean isCellEditable(int rowIndex, int columnIndex) {
                  return true;
              }
  
              @Override
              public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
                  if (columnIndex == 0) {
                      if (!ImInLoop) {
                          ImInLoop = true;
                          Boolean bol = (Boolean) aValue;
                          super.setValueAt(aValue, rowIndex, columnIndex);
                          for (int i = 0; i < this.getRowCount(); i++) {
                              if (i != rowIndex) {
                                  super.setValueAt(!bol, i, columnIndex);
                              }
                          }
                          ImInLoop = false;
                      }
                  } else {
                      super.setValueAt(aValue, rowIndex, columnIndex);
                  }
              }
          };
          table.setModel(model);
          table.setPreferredScrollableViewportSize(table.getPreferredSize());
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.add(new JScrollPane(table));
          frame.pack();
          frame.setLocationByPlatform(true);
          frame.setVisible(true);
      }
  
  
      public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
              @Override
              public void run() {
                  TableRolloverDemo tableRolloverDemo = new TableRolloverDemo();
              }
          });
      }
  }
  

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