- You must define a ButtonGroup that associates the JRadioButtons together. For each ButtonGroup, only one RadioButton can be selected at a time. But, you can have multiple ButtonGroups in one container, so there can be multiple groups of RadioButtons.
- The first argument to the JRadioButton constructor should be the text for the label, and the second argument is true if you want the button to be checked, or false if not.
- Example:
- It is often a good idea to keep JRadioButtons of the same group together in the same panel. This is logical for the user.
- We can add action listeners just as we have in previous swing components. We need to create the ActionListener class, instantiate it, and add it with the addActionListner(ActionListener l) method.
- And, of course, we can use the GUI editor in Forte' to do a lot of the work for us.
ButtonGroup grpCrust = new ButtonGroup();
JRadioButton rdoThin = new JRadioButton("Thin Crust", true);
grpCrust.add(rdoThin);
JRadioButton rdoTraditional = new JRadioButton("Traditional", false);
grpCrust.add(rdoTraditional);
JRadioButton rdoPan = new JRadioButton("Pan", false);
grpCrust.add(rdoPan);
