JTable單元格顏色

Question

有人能給我一個如何獲得JTable中特定單元格的背景顏色的例子嗎？我無法找到如何做到這一點的例子。大量關於如何獲取單元格中的值的示例，而不是單元格的背景顏色。

Answer 1

有人能給我一個如何獲得JTable中特定單元格的背景顏色的例子嗎？我無法找到如何做到這一點的例子。

• TableCellRenderer或Renderer，

• 但一切都基於JTable tutorial的​​expecially部分和Custom Renderers

• 大量實例here和here

大量關於獲取單元格中值的示例，但不是單元格的背景色。

• 我無法抗拒，請在這個論壇或者

• 我希望幫助你....

Answer 2

要在單元格0, 0得到JTable顏色你可以得到細胞成分的背景顏色：

TableCellRenderer cellRenderer = table.getCellRenderer(0, 0); 
Component rendererComponent = cellRenderer.getTableCellRendererComponent(table, null, false, true, 0, 0); 
Color cellColor = rendererComponent.getBackground(); 

Answer 3

它應該是類似以下內容（根據所有評論固定）：

重要提示：使用table.prepareRenderer（...）讓JTable中爲你做

public Color getTableCellBackground(JTable table, int row, int col) { 
    TableCellRenderer renderer = table.getCellRenderer(row, col); 
    Component component = table.prepareRenderer(renderer, row, col); 
    return component.getBackground(); 
} 

完全各項工作演示：

public class TableRenderDemo extends JPanel { 

    public TableRenderDemo() { 
     super(new GridLayout(1, 0)); 

     final JTable table = new JTable(new MyTableModel()); 
     table.setPreferredScrollableViewportSize(new Dimension(600, 200)); 
     table.setFillsViewportHeight(true); 
     table.setDefaultRenderer(Object.class, new MyRenderer()); 

     table.addMouseListener(new MouseAdapter() { 

      public void mouseClicked(MouseEvent e) { 
       int row = table.getSelectedRow(); 
       int col = table.getSelectedColumn(); 

       JOptionPane.showInternalMessageDialog(TableRenderDemo.this, 
         "Color: " + getTableCellBackground(table, row, col)); 

       System.out.println("Color: " + getTableCellBackground(table, row, col)); 
      } 
     }); 

     JScrollPane scrollPane = new JScrollPane(table); 
     add(scrollPane); 
    } 

    public Color getTableCellBackground(JTable table, int row, int col) { 
     TableCellRenderer renderer = table.getCellRenderer(row, col); 
     Component component = table.prepareRenderer(renderer, row, col);  
     return component.getBackground(); 
    } 

    class MyRenderer implements TableCellRenderer { 

     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, 
       boolean hasFocus, int row, int column) { 
      JTextField editor = new JTextField(); 
      if (value != null) { 
       editor.setText(value.toString()); 
      } 
      editor.setBackground((row % 2 == 0) ? Color.white : Color.BLUE); 
      return editor; 
     } 
    } 

    class MyTableModel extends AbstractTableModel { 

     private String[] columnNames = {"First Name", 
      "Last Name", 
      "Sport", 
      "# of Years", 
      "Vegetarian"}; 
     private Object[][] data = { 
      {"Kathy", "Smith", 
       "Snowboarding", new Integer(5), new Boolean(false)}, 
      {"John", "Doe", 
       "Rowing", new Integer(3), new Boolean(true)}, 
      {"Sue", "Black", 
       "Knitting", new Integer(2), new Boolean(false)}, 
      {"Jane", "White", 
       "Speed reading", new Integer(20), new Boolean(true)}, 
      {"Joe", "Brown", 
       "Pool", new Integer(10), new Boolean(false)} 
     }; 
     public final Object[] longValues = {"Jane", "Kathy", 
      "None of the above", 
      new Integer(20), Boolean.TRUE}; 

     public int getColumnCount() { 
      return columnNames.length; 
     } 

     public int getRowCount() { 
      return data.length; 
     } 

     public String getColumnName(int col) { 
      return columnNames[col]; 
     } 

     public Object getValueAt(int row, int col) { 
      return data[row][col]; 
     } 
    } 

    private static void createAndShowGUI() { 
     JFrame frame = new JFrame("TableRenderDemo"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     TableRenderDemo newContentPane = new TableRenderDemo(); 
     newContentPane.setOpaque(true); //content panes must be opaque 
     frame.setContentPane(newContentPane); 

     frame.pack(); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) { 
     javax.swing.SwingUtilities.invokeLater(new Runnable() { 

      public void run() { 
       createAndShowGUI(); 
      } 
     }); 
    } 
} 

Answer 4

使用的TableCellRenderer

jTable1 = new javax.swing.JTable(6,6){ 
public Component prepareRenderer(
    TableCellRenderer renderer, int row, int column) 
{ 

    Component c = super.prepareRenderer(renderer, row, column); 
    if(column==2 && row==4) 
    { 
     Color color= c.getBackground();// use setBackground to set color and get background to get background of a particular cell 
     System.out.println("Color of row=0 and column=0 is "+color); 

    } 

    else 
    { 
     c.setBackground(Color.GREEN); 
     setShowGrid(true); 
    } 
    return c; 

} 
};