A JTable is a subclass of JComponent class and it can be used to create a table with information displayed in multiple rows and columns. When a value is selected from a JTable, a TableModelEvent is generated, which is handled by implementing a TableModelListener interface. We can add or insert a radio button to a JTable cell by customizing the TableCellRenderer interface and the DefaultCellEditor class.
Example
import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.table.*; public class JTableRadioButtonTest extends JFrame { private DefaultTableModel dtm; private ButtonGroup bg; private JTable table; private JScrollPane jsp; public JTableRadioButtonTest() { setTitle("JTableRadioButton Test"); dtm = new DefaultTableModel(); dtm.setDataVector(new Object[][] {{"Course 1",new JRadioButton("Java")},{"Course 1",new JRadioButton("Python")}, {"Course 1",new JRadioButton("Scala")}, {"Course 2",new RadioButton("Selenium")}, {"Course 2",new JRadioButton("Java Script")}},new Object[] {"Course","Technology"}); table = new JTable(dtm) { public void tableChanged(TableModelEvent tme) { super.tableChanged(tme); repaint(); } }; bg = new ButtonGroup(); bg.add((JRadioButton)dtm.getValueAt(0,1)); bg.add((JRadioButton)dtm.getValueAt(1,1)); bg.add((JRadioButton)dtm.getValueAt(2,1)); bg.add((JRadioButton)dtm.getValueAt(3,1)); bg.add((JRadioButton)dtm.getValueAt(4,1)); table.getColumn("Technology").setCellRenderer(new RadioButtonRenderer()); table.getColumn("Technology").setCellEditor(new RadioButtonEditor(new JCheckBox())); jsp = new JScrollPane(table); add(jsp, BorderLayout.NORTH); setSize(400, 275); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLocationRelativeTo(null); setVisible(true); } public static void main(String[] args) { new JTableRadioButtonTest(); } } class RadioButtonRenderer implements TableCellRenderer { public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { if (value==null) return null; return (Component)value; } } class RadioButtonEditor extends DefaultCellEditor implements ItemListener { private JRadioButton button; public RadioButtonEditor(JCheckBox checkBox) { super(checkBox); } public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { if (value==null) return null; button = (JRadioButton)value; button.addItemListener(this); return (Component)value; } public Object getCellEditorValue() { button.removeItemListener(this); return button; } public void itemStateChanged(ItemEvent e) { super.fireEditingStopped(); } }