怎么在jtable的列前面加单选框附上代码和注释

很高兴回答你的问题。首先，在JTable中添加单选框可以使用JRadioButton作为列渲染器（Renderer）和编辑器（Editor）。

下面是一个简单的示例代码：

import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import java.awt.*;
import java.awt.event.ActionListener;

public class JTableWithRadioButtonExample extends JFrame {

    private final JTable table;
    private final String[] columnNames = {"Name", "Gender"};

    public JTableWithRadioButtonExample() {
        super("JTable with Radio Button Example");

        // create some sample data
        Object[][] data = {
                {"Alice", null},
                {"Bob", null},
                {"Charlie", null}
        };

        // create a table model with the data and column names
        DefaultTableModel model = new DefaultTableModel(data, columnNames);

        // create the table with the model
        table = new JTable(model);

        // add a radio button column renderer and editor for the Gender column
        table.getColumnModel().getColumn(1).setCellRenderer(new RadioButtonRenderer());
        table.getColumnModel().getColumn(1).setCellEditor(new RadioButtonEditor(new JCheckBox()));

        // add the table to the frame
        add(new JScrollPane(table));

        // set up the frame
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 300);
        setVisible(true);
    }

    /**
     * A custom table cell renderer for radio buttons.
     */
    private static class RadioButtonRenderer extends JRadioButton implements TableCellRenderer {
        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            if (value != null) {
                setSelected((Boolean) value);
            }
            return this;
        }
    }

    /**
     * A custom table cell editor for radio buttons.
     */
    private static class RadioButtonEditor extends DefaultCellEditor implements TableCellEditor {
        private JRadioButton button;

        public RadioButtonEditor(JCheckBox checkBox) {
            super(checkBox);
            button = new JRadioButton();
            button.setHorizontalAlignment(SwingConstants.CENTER);
        }

        @Override
        public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
            if (value != null) {
                button.setSelected((Boolean) value);
            }
            return button;
        }

        @Override
        public Object getCellEditorValue() {
            return button.isSelected();
        }
    }

    public static void main(String[] args) {
        new JTableWithRadioButtonExample();
    }
}

在这个示例中，JTable包含两列数据：姓名和性别。我们将性别列的渲染器和编辑器设置为自定义的RadioButtonRenderer和RadioButtonEditor，它们使用JRadioButton作为单选框按钮。

要实现这种功能，我们需要实现TableCellRenderer和TableCellEditor接口中的方法，并向列添加对应的渲染器和编辑器，如下所示：

table.getColumnModel().getColumn(1).setCellRenderer(new RadioButtonRenderer());
table.getColumnModel().getColumn(1).setCellEditor(new RadioButtonEditor(new JCheckBox()));

以上就是如何在JTable的列前面加单选框的代码和注释，希望对你有所帮助。