我喜欢您引用的Grouchnikov文章，但不确定是否要更改UI委托。因为这将是一个不可变对象的视图，所以我倾向于使用组合而不是继承。我倾向于想到您作为渲染器描述的组件，如本例所示。您可以添加
InputVerifier或
DocumwntListener以获得所需的验证。
附录：这是一个使用
JFormattedTextField和的示例
MaskFormatter。您需要调整格式掩码以匹配您的比例和长度。
public class TableGrid extends JPanel { private DecimalFormat df; private MaskFormatter mf; private JFormattedTextField tf; public TableGrid() { df = new DecimalFormat("0.00"); try { mf = new MaskFormatter("#.##"); } catch (ParseException ex) { ex.printStackTrace(); } tf = new JFormattedTextField(mf); TableModel dataModel = new TableModel(); JTable table = new JTable(dataModel); table.setCellSelectionEnabled(true); table.setRowHeight(32); table.setDefaultRenderer(BigDecimal.class, new DecRenderer(df)); table.setDefaultEditor(BigDecimal.class, new DecEditor(tf, df)); this.add(table); } private static class TableModel extends AbstractTableModel { private static final int SIZE = 4; private BigDecimal[][] matrix = new BigDecimal[SIZE][SIZE]; public TableModel() { for (Object[] row : matrix) { Arrays.fill(row, BigDecimal.valueOf(0)); } } @Override public int getRowCount() { return SIZE; } @Override public int getColumnCount() { return SIZE; } @Override public Object getValueAt(int row, int col) { return matrix[row][col]; } @Override public void setValueAt(Object value, int row, int col) { matrix[row][col] = (BigDecimal) value; } @Override public Class<?> getColumnClass(int col) { return BigDecimal.class; } @Override public boolean isCellEditable(int row, int col) { return true; } } private static class DecRenderer extends DefaultTableCellRenderer { DecimalFormat df; public DecRenderer(DecimalFormat df) { this.df = df; this.setHorizontalAlignment(JLabel.CENTER); this.setBackground(Color.lightGray); this.df.setParseBigDecimal(true); } @Override protected void setValue(Object value) { setText((value == null) ? "" : df.format(value)); } } private static class DecEditor extends DefaultCellEditor { private JFormattedTextField tf; private DecimalFormat df; public DecEditor(JFormattedTextField tf, DecimalFormat df) { super(tf); this.tf = tf; this.df = df; tf.setHorizontalAlignment(JFormattedTextField.CENTER); } @Override public Object getCellEditorValue() { try { return new BigDecimal(tf.getText()); } catch (NumberFormatException e) { return BigDecimal.valueOf(0); } } @Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { tf.setText((value == null) ? "" : df.format((BigDecimal) value)); if (isSelected) tf.selectAll(); return tf; } } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { Jframe f = new Jframe("TableGrid"); f.setDefaultCloseOperation(Jframe.DISPOSE_ON_CLOSE); f.add(new TableGrid()); f.pack(); f.setVisible(true); } }); }}
