Check Box Group

The checkbox group is also called as option button or radio button or exclusive check boxes. Check boxes are grouped together into check-box groups. So, only one member of a check box group is selected at a time. To use a check box group.

You first create an instance of CheckboxGroup and then pass the instance as a parameter to the Checkbox 

constructor:

Checkbox cb=new CheckBox(String caption, group, state)

Here group refers the CheckboxGroup object

CheckboxGroup cbg=new CheckboxGroup();

Example:

import java.applet.*;

import java.awt.*;

public class CheckboxGroupDemo extends Applet

{

    public void init()

    {

        setLayout(new GridLayout(3, 1));

        CheckboxGroup cbg=new CheckboxGroup();

        Checkbox cb1=new Checkbox("M.Sc", cbg,true);

        Checkbox cb2=new Checkbox("M.C.A", cbg, false);

        Checkbox cb3=new Checkbox("M.E", cbg, false);

        add(cb1);

        add(cb2);

        add(cb3);

    }

}

/*

 * <applet code="CheckboxGroupDemo.class" width=200 height=75>

 * </applet>

 */

How to Execute this Example??

d:\>  javac CheckboxGroupDemo.java

d:\>  appletviewer CheckboxGroupDemo.java

Output: