JTable 列在特定列号后停止工作

Question

我的印象是，在第 4 列 [索引 3] 之后，我的 jtable 的其余部分确实对格式化或数据验证有反应。

正如您在此图像中看到的那样，颜色在第 4 列之后停止：

声明：

private final JTable table = new JTable(new TableModelDB("all"));
private final JScrollPane scrollPane = new JScrollPane(table);

这是我所有与 jtable 相关的代码：

    JFormattedTextField ftext = new JFormattedTextField();
    try {
        MaskFormatter mask = new MaskFormatter("####-##-##");
        mask.setPlaceholderCharacter('_');
        mask.setAllowsInvalid(false);
        mask.install(ftext);
    } catch (ParseException e) {
        System.out.println("error: " + e);
    }
    table.setDefaultEditor(Object.class, new MyCellEditor());
    table.getColumnModel().getColumn(3).setCellEditor(new MyCellEditor(ftext));
    table.setRowHeight(30);
    table.setFillsViewportHeight(true);
    table.getModel().addTableModelListener(this);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    table.setDefaultRenderer(Object.class, cr);
    table.setAutoCreateColumnsFromModel(false);
    resizeColumnWidth();
    table.getTableHeader().setFont(new Font("Arial", Font.BOLD, 20));
    table.setFont(new Font("Arial", Font.PLAIN, 20));

使用 CellEditor 进行数据验证（验证工作正常，直到 column=4，使用 println() 我发现从未调用过 stopCellEditing 方法）：

    private boolean editValidation(String data) {
    System.out.println("editValidation");
    int column = table.getSelectedColumn();

    if (data == null || data.trim().isEmpty()) {
        System.out.println("c0");
        JOptionPane.showMessageDialog(null, "Cannot leave a field blank");
        return false;
    }

    if (column == 1 && data.length() > 255) {
        JOptionPane.showMessageDialog(null, "The Income name is too long (Max 255 characters)");
        return false;
    }
    if (column == 2 && data.length() > 255) {
        JOptionPane.showMessageDialog(null, "The Category name is too long (Max 255 characters)");
        return false;
    }
    if (column == 3) {
        if (data.contains("_")) {
            JOptionPane.showMessageDialog(null, "Invalid date");
            return false;
        } else {
            try {
                DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
                df.setLenient(false);
                df.parse(data);
            } catch (ParseException e) {
                JOptionPane.showMessageDialog(null, "Invalid date");
                return false;
            }
        }
    }
    if (column == 4) {
        System.out.println("c4");
        if (!data.matches("^[0-9]+")) {
            JOptionPane.showMessageDialog(null, "Amount contains non-number elements");
            return false;
        } else if (Integer.parseInt(data) <= 0) {
            JOptionPane.showMessageDialog(null, "Income cannot be less than or equal to zero");
            return false;
        }
    }

    return true;
}

public class MyCellEditor extends DefaultCellEditor {

    public MyCellEditor() {
        super(new JTextField());
    }

    MyCellEditor(JFormattedTextField ftext) {
        super(ftext);
    }

    @Override
    public boolean stopCellEditing() {
        System.out.println("stopCellEditing");
        final JTextField field = (JTextField) getComponent();
        if (editValidation(field.getText())) {
            System.out.println("case t");
            field.setBackground(Color.WHITE);
            return super.stopCellEditing();
        }
        System.out.println("case f");
        Toolkit.getDefaultToolkit().beep();
        field.setBackground(Color.RED);
        return false;
    }
}

Cell Renderer（尽管我将所有内容都设为浅灰色，但未应用索引 3 之后的列）：

public class CustomCellRenderer extends DefaultTableCellRenderer {

    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int col) {
        Component c = super.getTableCellRendererComponent(table, value,
                isSelected, hasFocus, row, col);

        c.setBackground(Color.LIGHT_GRAY);
//        if (col == 0) {
//            c.setBackground(Color.LIGHT_GRAY);
//        } else {
//            c.setBackground(Color.WHITE);
//        }
        return c;
    }
}

Table 型号：

public final class TableModelDB extends AbstractTableModel {

    private final WorkingClass wc = new WorkingClass();
    private final int startRows = 1;

    private final String[] columnNames = {"Income ID", "Income Name", "Category", "Entry Date", "Amount", "Delete"};
    private Object[][] data;

    public TableModelDB(String type) {
        try {
            ResultSet rs = wc.searchIncomeRS(type);
            int rowCount = wc.rowCount();
            int count = 0, amount, total = 0;
            Object[][] temp = new Object[rowCount + startRows][6];
            while (rs.next()) {
                temp[count][0] = rs.getString("ID");
                temp[count][1] = rs.getString("EntryName");
                temp[count][2] = rs.getString("Category");
                Date date = new Date(rs.getDate("EntryDate").getTime());
                temp[count][3] = wc.strDate(date);
                amount = rs.getInt("Amount");
                total += amount;
                temp[count][4] = amount;
                temp[count++][5] = false;
            }
            temp[count][4] = total;
            data = temp;
        } catch (SQLException ex) {
            System.out.println("error: " + ex);
        }
    }

    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];
    }

    public Class getColumnClass(int col) {
        for (int row = 0; row < getRowCount(); row++) {
            Object o = getValueAt(row, col);
            if (o != null) {
                return o.getClass();
            }
        }
        return Object.class;
    }

    public boolean isCellEditable(int row, int col) {
        return !(data[row][col] == null || data[row][0] == null || col == 0);
    }

    public void setValueAt(Object value, int row, int col) {
        data[row][col] = value;
        fireTableCellUpdated(row, col);
    }

}

如果哪位好心人能告诉我为什么专栏没有回复，将不胜感激，也欢迎任何其他错误或批评

非常感谢:)

Answer 1

在创建了一些测试后类我意识到只有带有字符串的列才能获得格式和 DV，所以我将其更改为：

        table.setDefaultEditor(String.class, new MyCellEditor());//DV
        table.setDefaultEditor(Integer.class, new MyCellEditor());//DV
        table.setDefaultEditor(Boolean.class, new MyCellEditor());//DV
        table.getColumnModel().getColumn(3).setCellEditor(new MyCellEditor(ftext));//Mask
        table.setDefaultRenderer(String.class, new CustomCellRenderer());//color
        table.setDefaultRenderer(Integer.class, new CustomCellRenderer());//color
        table.setDefaultRenderer(Boolean.class, new CustomCellRenderer());//color

现在一切正常

JTable 列在特定列号后停止工作

JTable column stops working after a certain column number

java

swing

jtable

tablecellrenderer

tablemodel