Radio boxes allow users to select a single item from a list of predetermined values.
To create a radio box list:
TerminalSize size = new TerminalSize(14, 10);
RadioBoxList<String> radioBoxList = new RadioBoxList<String>(size);
To add radioboxes to a list:
radioBoxList.addItem("item 1");
radioBoxList.addItem("item 2");
radioBoxList.addItem("item 3");
To get the currently checked item:
String checkedItems = radioBoxList.getCheckedItem();
