数据/模型与视图/表之间存在关系。模型维护“什么”，视图控制“如何”。
JTable提供了一种方法，通过该方法，您可以通过使用来表现“如何”（填充内容）的行为TableCellRenderers，这些行为负责
根据模型“内容”中的值确定如何“绘制”单元格。
首先看一下如何使用表格 和使用自定义 渲染器
现在，此示例使用一个double值来确定距1像元的距离，该值为代表应绘制像元的颜色（黑色= 0；白色= 1）。为此，它使用了一个自定义方法TableCellRenderer，该方法将模型中的值（“什么”）转换为颜色（或“如何”）
public class PaintTableCellRenderer extends DefaultTableCellRenderer { @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { super.getTableCellRendererComponent(table, "", isSelected, hasFocus, row, column); if (value instanceof Double) { double distance = (double) value; int part = (int) (255 * distance); Color color = new Color(part, part, part); setBackground(color); } else { setBackground(Color.WHITE); } return this; }}It also demonstrates a couple of other things you might need to know about the
JTableas well.
import java.awt.BorderLayout;import java.awt.Color;import java.awt.Component;import java.awt.Dimension;import java.awt.EventQueue;import java.util.Enumeration;import javax.swing.Jframe;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;import javax.swing.table.AbstractTableModel;import javax.swing.table.DefaultTableCellRenderer;import javax.swing.table.TableColumn;public class Smile { public static void main(String[] args) { new Smile(); } public Smile() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } Jframe frame = new Jframe("Testing"); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { private double[][] smily = { {1, 1, 1, 1, 1, 0.996, 1, 0.843, 0.784, 0.788, 0.773, 0.769, 0.765, 0.765, 0.788, 0.784, 0.847, 1, 0.996, 1, 1, 1, 1, 0.996}, {1, 1, 1, 1, 1, 0.871, 0.733, 0.761, 0.847, 0.941, 0.941, 0.941, 0.941, 0.941, 0.933, 0.843, 0.761, 0.733, 0.871, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 0.784, 0.733, 0.902, 0.941, 0.941, 0.941, 0.945, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.898, 0.733, 0.784, 1, 1, 1, 1}, {1, 1, 1, 0.765, 0.773, 0.945, 0.945, 0.941, 0.929, 0.937, 0.941, 0.941, 0.945, 0.941, 0.957, 0.91, 0.941, 0.941, 0.941, 0.78, 0.761, 1, 1, 1}, {1, 1, 0.808, 0.773, 0.941, 0.941, 0.941, 0.941, 0.294, 0.447, 0.941, 0.941, 0.941, 0.941, 0.702, 0.239, 0.886, 0.941, 0.945, 0.941, 0.78, 0.8, 1, 1}, {1, 0.89, 0.725, 0.945, 0.941, 0.941, 0.945, 0.843, 0, 0, 0.922, 0.945, 0.941, 0.941, 0.408, 0, 0.663, 0.941, 0.941, 0.945, 0.941, 0.725, 0.89, 1}, {0.992, 0.753, 0.902, 0.941, 0.945, 0.945, 0.941, 0.725, 0.051, 0, 0.808, 0.941, 0.941, 0.945, 0.294, 0.051, 0.553, 0.941, 0.941, 0.941, 0.941, 0.91, 0.741, 0.984}, {0.871, 0.78, 0.941, 0.941, 0.945, 0.945, 0.941, 0.694, 0.051, 0, 0.784, 0.945, 0.941, 0.941, 0.278, 0, 0.518, 0.941, 0.941, 0.945, 0.941, 0.941, 0.78, 0.878}, {0.816, 0.855, 0.941, 0.945, 0.945, 0.945, 0.941, 0.737, 0, 0.051, 0.82, 0.941, 0.941, 0.941, 0.302, 0.051, 0.565, 0.941, 0.949, 0.945, 0.941, 0.941, 0.863, 0.804}, {0.8, 0.945, 0.941, 0.945, 0.945, 0.941, 0.941, 0.875, 0, 0, 0.937, 0.941, 0.941, 0.941, 0.443, 0, 0.694, 0.945, 0.945, 0.945, 0.945, 0.949, 0.941, 0.765}, {0.769, 0.941, 0.945, 0.957, 0.961, 0.941, 0.945, 0.941, 0.443, 0.565, 0.945, 0.941, 0.941, 0.941, 0.769, 0.388, 0.918, 0.941, 0.941, 0.941, 0.945, 0.941, 0.941, 0.78}, {0.753, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.953, 0.941, 0.941, 0.941, 0.941, 0.945, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.788}, {0.741, 0.945, 0.839, 0.427, 0.624, 0.941, 0.941, 0.945, 0.941, 0.941, 0.941, 0.949, 0.945, 0.945, 0.941, 0.941, 0.941, 0.941, 0.941, 0.6, 0.376, 0.941, 0.945, 0.784}, {0.749, 0.941, 0.914, 0.345, 0.647, 0.941, 0.945, 0.949, 0.945, 0.945, 0.941, 0.941, 0.945, 0.941, 0.945, 0.945, 0.945, 0.945, 0.941, 0.702, 0.384, 0.941, 0.941, 0.78}, {0.796, 0.945, 0.941, 0.627, 0.592, 0.941, 0.941, 0.941, 0.945, 0.945, 0.945, 0.941, 0.949, 0.945, 0.941, 0.945, 0.945, 0.937, 0.945, 0.58, 0.631, 0.941, 0.937, 0.776}, {0.812, 0.859, 0.941, 0.855, 0.384, 0.957, 0.941, 0.945, 0.945, 0.945, 0.941, 0.953, 0.941, 0.945, 0.945, 0.945, 0.941, 0.941, 0.941, 0.384, 0.941, 0.941, 0.867, 0.812}, {0.871, 0.788, 0.941, 0.941, 0.533, 0.51, 0.941, 0.941, 0.941, 0.945, 0.949, 0.945, 0.945, 0.945, 0.941, 0.937, 0.941, 0.945, 0.522, 0.522, 0.941, 0.941, 0.792, 0.886}, {0.992, 0.761, 0.914, 0.941, 0.941, 0.325, 0.612, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.624, 0.318, 0.941, 0.945, 0.91, 0.765, 0.988}, {1, 0.882, 0.741, 0.941, 0.941, 0.922, 0.337, 0.475, 0.894, 0.941, 0.941, 0.941, 0.941, 0.941, 0.945, 0.894, 0.49, 0.325, 0.925, 0.941, 0.941, 0.753, 0.894, 1}, {1, 1, 0.796, 0.78, 0.941, 0.941, 0.941, 0.592, 0.447, 0.565, 0.667, 0.737, 0.737, 0.667, 0.565, 0.451, 0.588, 0.941, 0.941, 0.941, 0.796, 0.808, 1, 1}, {1, 1, 0.996, 0.753, 0.788, 0.941, 0.941, 0.941, 0.941, 0.702, 0.584, 0.557, 0.553, 0.592, 0.698, 0.906, 0.941, 0.945, 0.941, 0.796, 0.769, 0.996, 1, 1}, {1, 1, 1, 1, 0.769, 0.745, 0.922, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.941, 0.918, 0.741, 0.776, 1, 1, 0.996, 1}, {1, 0.996, 1, 1, 1, 0.851, 0.733, 0.773, 0.867, 0.945, 0.941, 0.941, 0.941, 0.941, 0.945, 0.867, 0.769, 0.725, 0.851, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 0.984, 0.843, 0.78, 0.761, 0.78, 0.796, 0.796, 0.784, 0.765, 0.78, 0.835, 0.984, 1, 1, 1, 1, 1, 1} }; public TestPane() { AsciiTableModel model = new AsciiTableModel(); model.setData(smily); JTable table = new JTable(model); table.setRowHeight(24); Enumeration<TableColumn> columns = table.getColumnModel().getColumns(); while (columns.hasMoreElements()) { TableColumn col = columns.nextElement(); col.setWidth(24); col.setPreferredWidth(24); col.setMinWidth(24); col.setMaxWidth(24); } table.setRowHeight(24); table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.setDefaultRenderer(Object.class, new PaintTableCellRenderer()); setLayout(new BorderLayout()); add(new JScrollPane(table)); } @Override public Dimension getPreferredSize() { return new Dimension(200, 200); } } public class PaintTableCellRenderer extends DefaultTableCellRenderer { @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { super.getTableCellRendererComponent(table, "", isSelected, hasFocus, row, column); if (value instanceof Double) { double distance = (double) value; int part = (int) (255 * distance); Color color = new Color(part, part, part); setBackground(color); } else { setBackground(Color.WHITE); } return this; } } public class AsciiTableModel extends AbstractTableModel { private double[][] data; public AsciiTableModel() { data = new double[24][24]; } public void setData(double[][] value) { data = value; fireTableDataChanged(); } @Override public int getRowCount() { return 24; } @Override public int getColumnCount() { return 24; } @Override public Object getValueAt(int rowIndex, int columnIndex) { return data[rowIndex][columnIndex]; } }}我原本打算提供一张“悲伤”的脸，您可以在这之间切换，但我的女儿要我和她一起画画，对不起；）
