How to set ButtonGroup inactive?

Question

Hello
I have 2 buttongroups in a frame. Within each, a number of JCheckBox appear. Based on the choise in Buttongroup 1, the Buttongroup 2 may or may not be nessecary. But how to set the buttongroup inactive?
Regards
Jens

Answer 1

You have to set the checkboxes inactiveimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test3 extends JFrame {
  ButtonGroup bg1 = new ButtonGroup(), bg2 = new ButtonGroup();
  JCheckBox[] rightButtons = new JCheckBox[4];
  public Test3() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = getContentPane();
    JPanel left = new JPanel(new GridLayout(0,1)), right = new JPanel(new GridLayout(0,1));
    content.add(left, BorderLayout.WEST);
    content.add(right, BorderLayout.EAST);
    for (int i=0; i<5; i++) {
      JCheckBox jb = new JCheckBox((i%2==0?"Enable":"Disable")+"-"+i);
      left.add(jb);
      bg1.add(jb);
      jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ae) {
          boolean flag = ((JCheckBox)ae.getSource()).getText().startsWith("Enable");
          for (int i=0; i<rightButtons.length; i++) {
            rightButtons.setEnabled(flag);
for (int i=0; i<rightButtons.length; i++) {
rightButtons[i] = new JCheckBox("Right-"+i);
right.add(rightButtons[i]);
bg2.add(rightButtons[i]);
setSize(300, 300);
public static void main(String[] args) { new Test3().setVisible(true); }