SWING RADIO BUTTONS

Radio buttons are groups of buttons where normally only one button can be selected at a time. JradioButton and ButtonGroup classes both support radio buttons. Each time the user selects a button, an action event occurs, usually an action listener is attached.
When creating a group of radio buttons, you need to create a ButtonGroup and then add each radio button to the group. This insures that only one button can be selected from each individual group at a time.