Java - Multiple radio in jtable.

Các mã sau đây thêm nhiều JButtons trong JTable.
The following code add multiple JButtons to JTable.





Mã nguồn - Source Code

//Example modified from http://www.crionics.com/products/opensource/faq/swing_ex/JTableExamples2.html

/**
 * @version 1.0 12/03/98
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;

/**
 * @version 1.2 08/13/99
 */
public class JRadioButtonTableExample2 extends JFrame {

    public JRadioButtonTableExample2() {
        super("JRadioButtonTable Example");

        DefaultTableModel dm = new DefaultTableModel();
        dm.setDataVector(
                new Object[][]{
            {"1", new Integer(-1)},
            {"2", new Integer(-1)},
            {"3", new Integer(0)},
            {"4", new Integer(1)},
            {"5", new Integer(2)}},
                new Object[]{"Question", "Answer"});

        JTable table = new JTable(dm);
        String[] answer = {"A", "B", "C"};

        table.getColumn("Answer").setCellRenderer(
                new RadioButtonRenderer(answer));
        table.getColumn("Answer").setCellEditor(
                new RadioButtonEditor(new JCheckBox(),
                new RadioButtonPanel(answer)));
        JScrollPane scroll = new JScrollPane(table);
        getContentPane().add(scroll);
    }

// Cell base
    class RadioButtonPanel extends JPanel {

        JRadioButton[] buttons;

        RadioButtonPanel(String[] str) {
            setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
            buttons = new JRadioButton[str.length];
            for (int i = 0; i < buttons.length; i++) {
                buttons[i] = new JRadioButton(str[i]);
                buttons[i].setFocusPainted(false);
                add(buttons[i]);
            }
        }

        public void setSelectedIndex(int index) {
            for (int i = 0; i < buttons.length; i++) {
                buttons[i].setSelected(i == index);
            }
        }

        public int getSelectedIndex() {
            for (int i = 0; i < buttons.length; i++) {
                if (buttons[i].isSelected()) {
                    return i;
                }
            }
            return -1;
        }

        public JRadioButton[] getButtons() {
            return buttons;
        }
    }

    class RadioButtonRenderer extends RadioButtonPanel
            implements TableCellRenderer {

        RadioButtonRenderer(String[] strs) {
            super(strs);
        }

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value,
                boolean isSelected, boolean hasFocus, int row, int column) {
            if (value instanceof Integer) {
                setSelectedIndex(((Integer) value).intValue());
            }
            return this;
        }
    }

    class RadioButtonEditor extends DefaultCellEditor
            implements ItemListener {

        RadioButtonPanel panel;

        public RadioButtonEditor(JCheckBox checkBox, RadioButtonPanel panel) {
            super(checkBox);
            this.panel = panel;
            ButtonGroup buttonGroup = new ButtonGroup();
            JRadioButton[] buttons = panel.getButtons();
            for (int i = 0; i < buttons.length; i++) {
                buttonGroup.add(buttons[i]);
                buttons[i].addItemListener(this);
            }
        }

        @Override
        public Component getTableCellEditorComponent(JTable table, Object value,
                boolean isSelected, int row, int column) {
            if (value instanceof Integer) {
                panel.setSelectedIndex(((Integer) value).intValue());
            }
            return panel;
        }

        @Override
        public Object getCellEditorValue() {
            return new Integer(panel.getSelectedIndex());
        }

        @Override
        public void itemStateChanged(ItemEvent e) {
            super.fireEditingStopped();
        }
    }

    public static void main(String[] args) {
        JRadioButtonTableExample2 frame = new JRadioButtonTableExample2();
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        frame.setSize(230, 140);
        frame.setVisible(true);
    }
}

Kết quả - Result

Source: kidslovepc.com