Java

m 8.2 Swing Components

1 ! 3

individual button objects to be of type JRadioButton. Then declare the radio button group

object to be of type ButtonGroup. For example,

JRadioButton agel, age2, age3,

age4;

ButtonGroup ageButton;

Then invoke the javax, swing.ButtonGroup constructor, as follows:

ageButton = new ButtonGroup();

The individual buttons are created using the javax, swing.JRadioButton constructor, for ex-

ample

agel = new JRadioButton("age under 20") ;

The individual buttons are then added to the radio button group using the j avax. swing.Button-

Group. add method, as follows:

ageButton.add(agel);

8.2.5 ...