如何在JTable示例顏色單元格編號（2,2）中爲特定單元格着色？

Question

我有這個代碼，我想用不同的顏色給每個單元格着色，例如我想用紅色和紅色單元格編號爲1,2以及用紅色單元格編號爲1,2等等。如何可能？很多例子，但他們都展示瞭如何在點擊或鼠標點擊時爲單元格着色，而且我不想使用它。提前感謝。

package test; 

public class ModelJTable extends JFrame { 
    private DefaultTableModel model; 

    private JTable table; 

    public ModelJTable() throws IOException { 
     super(); 
     model = new DefaultTableModel(); 
     model.addColumn("price"); 
     model.addColumn("quantity"); 
     model.addColumn("buy"); 
     model.addColumn("sell"); 
     String array[][] = new String[6][6]; 
     array[0][0] = "35"; 
     array[0][1] = "1"; 
     array[0][2] = "2"; 
     array[1][0] = "34"; 
     array[1][1] = "2"; 
     array[1][2] = "3"; 
     array[2][0] = "37"; 
     array[2][1] = "2"; 
     array[2][2] = "6"; 
     array[3][0] = "33"; 
     array[3][1] = "7"; 
     array[3][2] = "8"; 
     array[4][0] = "34"; 
     array[4][1] = "9"; 
     array[4][2] = "4"; 
     array[5][0]="35"; 
     array[5][1]="9"; 
     array[5][2]="6"; 

     String mainarray[][] = new String[6][6]; 
       //copy all elements of array to mainarray 


     for(int i=0;i<5;i++) 
     { 
      String temp[]={""}; 
      model.addRow(temp); 
     } 
     for (int i = 5; i < 10; i++) { 
      model.insertRow(i, array[i-5]); 
      // System.out.print(mainarray[i][j]+" "); 
     } 
     table = new JTable(model); 

     JTextField textBox=new JTextField(); 
     TableColumn soprtColumn=table.getColumnModel().getColumn(1); 

     soprtColumn.setCellEditor(new DefaultCellEditor (textBox)); 

     table.setCellSelectionEnabled(true); 

     textBox.setBackground(Color.RED); 
     JPanel inputPanel = new JPanel(); 
     inputPanel.add(addButton); 
     inputPanel.add(removeButton); 
     Container container = getContentPane(); 
     container.add(new JScrollPane(table), BorderLayout.CENTER); 
     container.add(inputPanel, BorderLayout.NORTH); 

     setDefaultCloseOperation(EXIT_ON_CLOSE); 
     setSize(400, 300); 
     setVisible(true); 
    } 

     public static void main(String args[]) throws IOException { 
     new ModelJTable(); 
    } 
    public Component getTableCellRendererComponent 
    (JTable table, Object value, boolean isSelected, 
    boolean hasFocus, int row, int column) 
    { 
     Component cell = model.getTableCellRendererComponent 
     (table, value, isSelected, hasFocus, row, column); 
     if(value instanceof Integer) 
     { 
      Integer amount = (Integer) value; 
      if(amount.intValue() < 0) 
      { 
       cell.setBackground(Color.red); 
       // You can also customize the Font and Foreground this way 
       // cell.setForeground(); 
       // cell.setFont(); 
      } 
      else 
      { 
       cell.setBackground(Color.white); 
      } 
     } 
     return cell; 
    } 
} 

Answer 1

• 有一些錯誤，我不能評論什麼

• 變化if (isRowSelected(row) && isColumnSelected(column)) {到if ((row == 2) && (column == 2)) {（如果有行/列的數量是大於之前測試...），那麼

從代碼0

import java.awt.*; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import javax.swing.*; 
import javax.swing.border.LineBorder; 
import javax.swing.event.ListSelectionEvent; 
import javax.swing.event.ListSelectionListener; 
import javax.swing.table.*; 

public class RemoveAddRows extends JFrame { 

    private static final long serialVersionUID = 1L; 
    private Object[] columnNames = {"Type", "Company", "Shares", "Price"}; 
    private Object[][] data = { 
     {"Buy", "IBM", Integer.valueOf(1000), Double.valueOf(80.50)}, 
     {"Sell", "MicroSoft", Integer.valueOf(2000), Double.valueOf(6.25)}, 
     {"Sell", "Apple", Integer.valueOf(3000), Double.valueOf(7.35)}, 
     {"Buy", "Nortel", Integer.valueOf(4000), Double.valueOf(20.00)} 
    }; 
    private JTable table; 
    private DefaultTableModel model; 
    private javax.swing.Timer timer = null; 

    public RemoveAddRows() { 
     model = new DefaultTableModel(data, columnNames) { 
      private static final long serialVersionUID = 1L; 

      @Override 
      public Class getColumnClass(int column) { 
       return getValueAt(0, column).getClass(); 
      } 
     }; 
     table = new JTable(model) { 
      private static final long serialVersionUID = 1L; 

      @Override 
      public Component prepareRenderer(TableCellRenderer renderer, int row, int column) { 
       Component c = super.prepareRenderer(renderer, row, column); 
       if (isRowSelected(row) && isColumnSelected(column)) { 
        ((JComponent) c).setBorder(new LineBorder(Color.red)); 
       } 
       return c; 
      } 
     }; 
     DefaultTableCellRenderer stringRenderer = (DefaultTableCellRenderer) table.getDefaultRenderer(String.class); 
     stringRenderer.setHorizontalAlignment(SwingConstants.CENTER); 
     ListSelectionModel rowSelMod = table.getSelectionModel(); 
     rowSelMod.addListSelectionListener(new ListSelectionListener() { 
      @Override 
      public void valueChanged(ListSelectionEvent e) { 
       int row = table.getSelectedRow(); 
       int col = table.getSelectedColumn(); 
       String str = "Selected Row(s): "; 
       int[] rows = table.getSelectedRows(); 
       for (int i = 0; i < rows.length; i++) { 
        str += rows[i] + " "; 
       } 
       str += "Selected Column(s): "; 
       int[] cols = table.getSelectedColumns(); 
       for (int i = 0; i < cols.length; i++) { 
        str += cols[i] + " "; 
       } 
       str += "Selected Cell: " + table.getSelectedRow() + ", " + table.getSelectedColumn(); 
       System.out.println(str); 
       Object value = table.getValueAt(row, col); 
       System.out.println(String.valueOf(value)); 
      } 
     }); 
     table.setPreferredScrollableViewportSize(table.getPreferredSize()); 
     JScrollPane scrollPane = new JScrollPane(table); 
     add(scrollPane); 
     JButton button1 = new JButton("Remove all rows"); 
     button1.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent arg0) { 
       if (model.getRowCount() > 0) { 
        for (int i = model.getRowCount() - 1; i > -1; i--) { 
         model.removeRow(i); 
        } 
       } 
       System.out.println("model.getRowCount() --->" + model.getRowCount()); 
      } 
     }); 
     JButton button2 = new JButton("Add new rows"); 
     button2.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent arg0) { 
       start(); 
      } 
     }); 
     JPanel southPanel = new JPanel(); 
     southPanel.add(button1); 
     southPanel.add(button2); 
     add(southPanel, BorderLayout.SOUTH); 
    } 

    private void start() { 
     timer = new javax.swing.Timer(2500, updateCol()); 
     timer.start(); 
    } 

    public Action updateCol() { 
     return new AbstractAction("text load action") { 
      private static final long serialVersionUID = 1L; 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       DefaultTableModel model = (DefaultTableModel) table.getModel(); 
       Object[] data0 = {"Buy", "IBM", Integer.valueOf(1000), Double.valueOf(80.50)}; 
       model.addRow(data0); 
       Object[] data1 = {"Sell", "MicroSoft", Integer.valueOf(2000), Double.valueOf(6.25)}; 
       model.addRow(data1); 
       Object[] data2 = {"Sell", "Apple", Integer.valueOf(3000), Double.valueOf(7.35)}; 
       model.addRow(data2); 
       Object[] data3 = {"Buy", "Nortel", Integer.valueOf(4000), Double.valueOf(20.00)}; 
       model.addRow(data3); 
       System.out.println("model.getRowCount() --->" + model.getRowCount()); 
       timer.stop(); 
       int rowIndex = table.getRowCount() - 1; 
       table.changeSelection(rowIndex, 0, false, false); 
      } 
     }; 
    } 

    public static void main(String[] args) { 
     javax.swing.SwingUtilities.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       RemoveAddRows frame = new RemoveAddRows(); 
       frame.setDefaultCloseOperation(EXIT_ON_CLOSE); 
       frame.pack(); 
       frame.setLocationRelativeTo(null); 
       frame.setVisible(true); 
      } 
     }); 
    } 
}