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How can we add/insert a JRadioButton to a JTable cell in Java?
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();
}
}Output
Updated on: 10-Feb-2020
705 Views
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