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我有这个代码，我想用不同的颜色为每个单元格着色，例如，我想用红色给单元格编号 1,1 着色，用浅红色给单元格编号 1,2 着色等等。这怎么可能？我经历了很多例子但他们都展示了如何在鼠标点击或鼠标点击时为单元格着色，我想要它。提前致谢。

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;
  }
}
4

1 回答 1

2

  • 有一些错误我无法评论

  • 更改if (isRowSelected(row) && isColumnSelected(column)) {为if ((row == 2) && (column == 2)) {（如果行数/列数大于...，则必须先测试）然后

在此处输入图像描述

从代码

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);
            }
        });
    }
}
于 2013-06-04T12:58:27.450 回答