How can we add/insert a JRadioButton to a JTable cell in Java?

AWTJavaObject Oriented ProgrammingProgrammingSwing

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

raja
Published on 24-Jul-2019 08:19:47
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