如何在Jlist中添加两列？

Question

我发现一个双JList示例代码，但我需要两列Jlist。 如何在Jlist中添加两列？

我试图使用ListCellRenderer，但我没有添加元素到模型中。

Here's该代码在具有图像的网页中显示。

Answer 1

你的意思是这样的吗？

我通过具有通过How to Use Tables

主框架一读取开始...

public class DualTableFrame extends JFrame { 

    private JTable leftTable; 
    private JTable rightTable; 
    private JButton addButton; 
    private JButton removeButton; 

    public DualTableFrame() { 

     setTitle("Dual wielding tables"); 
     setDefaultCloseOperation(EXIT_ON_CLOSE); 

     setLayout(new GridBagLayout()); 

     leftTable = new JTable(new SimpleColorTableModel()); 
     rightTable = new JTable(new SimpleColorTableModel()); 

     setupTable(leftTable); 
     setupTable(rightTable); 

     populate((SimpleColorTableModel) leftTable.getModel()); 

     addButton = new JButton("Add >>"); 
     removeButton = new JButton("<< Remove"); 

     JPanel pnlActions = new JPanel(new GridBagLayout()); 
     GridBagConstraints gbc = new GridBagConstraints(); 
     gbc.gridx = 0; 
     gbc.gridy = 0; 
     gbc.fill = GridBagConstraints.HORIZONTAL; 
     pnlActions.add(addButton, gbc); 

     gbc.gridy++; 
     pnlActions.add(removeButton, gbc); 

     gbc = new GridBagConstraints(); 
     gbc.gridx = 0; 
     gbc.gridy = 0; 
     gbc.weightx = 0.33; 
     gbc.fill = GridBagConstraints.HORIZONTAL; 

     add(new JLabel("Available Choices"), gbc); 
     gbc.gridx++; 
     add(new JPanel(), gbc); 
     gbc.gridx++; 
     add(new JLabel("Your Choices"), gbc); 

     gbc.gridy++; 
     gbc.gridx = 0; 
     gbc.weighty++; 
     gbc.fill = GridBagConstraints.BOTH; 

     add(new JScrollPane(leftTable), gbc); 
     gbc.gridx++; 
     add(pnlActions, gbc); 
     gbc.gridx++; 
     add(new JScrollPane(rightTable), gbc); 

     setSize(400, 600); 

     addButton.setEnabled(false); 
     removeButton.setEnabled(false); 

     leftTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() { 
      @Override 
      public void valueChanged(ListSelectionEvent e) { 

       int count = leftTable.getSelectedRowCount(); 
       addButton.setEnabled(count > 0); 

      } 
     }); 
     rightTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() { 
      @Override 
      public void valueChanged(ListSelectionEvent e) { 

       int count = rightTable.getSelectedRowCount(); 
       removeButton.setEnabled(count > 0); 

      } 
     }); 

     addButton.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 

       moveSelectedRow(leftTable, rightTable); 

      } 
     }); 

     removeButton.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 

       moveSelectedRow(rightTable, leftTable); 

      } 
     }); 

    } 

    protected void moveSelectedRow(JTable from, JTable to) { 

     SimpleColorTableModel fromModel = (SimpleColorTableModel) from.getModel(); 
     SimpleColorTableModel toModel = (SimpleColorTableModel) to.getModel(); 

     for (int index : from.getSelectedRows()) { 

      Vector rowValue = (Vector) fromModel.getDataVector().get(index); 

      toModel.addRow(rowValue); 

     } 

     int selectedRow = -1; 
     while ((selectedRow = from.getSelectedRow()) != -1) { 

      fromModel.removeRow(selectedRow); 

     } 

     from.clearSelection(); 

    } 

    protected void populate(SimpleColorTableModel model) { 

     model.addRow(new Object[]{"Black", Color.BLACK}); 
     model.addRow(new Object[]{"Blue", Color.BLUE}); 
     model.addRow(new Object[]{"Cyan", Color.CYAN}); 
     model.addRow(new Object[]{"Dark Gray", Color.DARK_GRAY}); 
     model.addRow(new Object[]{"Gray", Color.GRAY}); 
     model.addRow(new Object[]{"Green", Color.GREEN}); 
     model.addRow(new Object[]{"Light Gary", Color.LIGHT_GRAY}); 
     model.addRow(new Object[]{"Mangenta", Color.MAGENTA}); 
     model.addRow(new Object[]{"Orange", Color.ORANGE}); 
     model.addRow(new Object[]{"Pink", Color.PINK}); 
     model.addRow(new Object[]{"Red", Color.RED}); 
     model.addRow(new Object[]{"White", Color.WHITE}); 
     model.addRow(new Object[]{"Yellow", Color.YELLOW}); 

    } 

    protected void setupTable(JTable table) { 

     table.setFillsViewportHeight(true); 

     table.setDefaultRenderer(Color.class, new ColorTableCellRenderer()); 

    } 
} 

表格渲染

public class ColorTableCellRenderer extends DefaultTableCellRenderer { 

    @Override 
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { 

     super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column); 

     setText(null); 
     if (value instanceof Color) { 

      setOpaque(true); 
      setBackground((Color)value); 

     } 

     return this; 

    } 

} 

表模型

public class SimpleColorTableModel extends DefaultTableModel { 

    public SimpleColorTableModel() { 

     addColumn("Name"); 
     addColumn("Color"); 

    } 

    @Override 
    public Class<?> getColumnClass(int columnIndex) { 

     Class clazz = String.class; 

     switch (columnIndex) { 

      case 1: 
       clazz = Color.class; 
       break; 

     } 

     return clazz; 

    } 

}