Thread: grouping jcheck button's

public class j_01_FLOW_06 extends JApplet implements ActionListener
{
	//Choice shoplist = new Choice();
	//ButtonGroup bg_group = new ButtonGroup();
 
	CheckboxGroup cg_Group = new CheckboxGroup();
	JCheckBox cb_i1 = new JCheckBox("fafa");
	JCheckBox cb_2 = new JCheckBox("wfw");
	JCheckBox cb_3 = new JCheckBox("Computer");
 
	String s_value[]={"white sox","red sox","mets","cordianls","blue jays"};
	JList l_list = new JList(s_value);
 
	Container c;
	FlowLayout flow = new FlowLayout();
 
 
	public void init()
	{
		c = getContentPane();
		c.setLayout(flow);
 
 
		cb_group.add(cb_1);
                cb_group.add(cb_2);
                cb_group.add(cb_3);
               c.add(cb_group);
		c.add(shoplist);
 
           }
}

i want to group some jcheck buttons. so that its top to bottom. but iam getting error at :
cb_group.add(cb_1);
cb_group.add(cb_2);
cb_group.add(cb_3);
c.add(cb_group);

i want to group some jcheck buttons. so that its top to bottom. but iam getting error at :

What is the error?

undifne method

add(cb_1)

JCheckBox cb_i1 = new JCheckBox("fafa");

?

JCheckBox cb_i1 = new JCheckBox("fafa");

?

... yes that line work fine. problem is with checkboxgroup.

JCheckBox ------ cb_i1 ------ = new JCheckBox("fafa");
add(cb_1)

are you sure?