Question

我创建了一个JTable并为其实现了自定义表模型，以便为布尔值呈现复选框。我遇到的问题是复选框不可编辑。

public class JTableBooleanAsCheckbox extends JPanel {
public JTableBooleanAsCheckbox() {
    initializeUI();
}

private void initializeUI() {
    setLayout(new BorderLayout());
    setPreferredSize(new Dimension(450, 150));

    JTable table = new JTable(new BooleanTableModel());
    table.setFillsViewportHeight(true);
    JScrollPane pane = new JScrollPane(table);
    add(pane, BorderLayout.CENTER);
}

public static void showFrame() {
    JPanel panel = new JTableBooleanAsCheckbox();
    panel.setOpaque(true);

    JFrame frame = new JFrame("JTable Boolean as Checkbox");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(panel);
    frame.pack();
    frame.setVisible(true);
}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            JTableBooleanAsCheckbox.showFrame();
        }
    });
}

表格模型如下。

class BooleanTableModel extends AbstractTableModel {
    String[] columns = {"STUDENT ID", "NAME", "SCORE", "PASSED"};
    Object[][] data = {
            {"S001", "ALICE", 90.00, Boolean.TRUE},
            {"S002", "BOB", 45.50, Boolean.FALSE},
            {"S003", "CAROL", 60.00, Boolean.FALSE},
            {"S004", "MALLORY", 75.80, Boolean.TRUE}
    };

    public int getRowCount() {
        return data.length;
    }

    public int getColumnCount() {
        return columns.length;
    }

    public Object getValueAt(int rowIndex, int columnIndex) {
        return data[rowIndex][columnIndex];
    }

    @Override
    public String getColumnName(int column) {
        return columns[column];
    }

    //
    // This method is used by the JTable to define the default
    // renderer or editor for each cell. For example if you have
    // a boolean data it will be rendered as a check box. A
    // number value is right aligned.
    //
    @Override
    public Class<?> getColumnClass(int columnIndex) {
        return data[0][columnIndex].getClass();
    }
    @Override
    public boolean isCellEditable(int rowIndex,int columnIndex) {
        if(rowIndex == 3)
           return true;
        return false;
    }
}

这里有什么问题？我将单元格设置为包含复选框的单元格。仍然无法更改复选框的状态（选中取消选中）。

Answer 1

isCellEditable的{{1}}方法存在错误。您需要检查BooleanTableModel，而不是rowIndex == 3。它应该是：

columnIndex == 3

此外，您需要覆盖其@Override public boolean isCellEditable(int rowIndex, int columnIndex) { if(columnIndex == 3) return true; return false; }方法，因为setValueAt的{{3}}方法无效：

AbstractTableModel

JTable复选框（布尔）列不可编辑

1 个答案: