return the number of buttons in this button group . concode_field_sep long serialVersionUID concode_elem_sep Vector<AbstractButton> buttons concode_elem_sep ButtonModel sel concode_field_sep void add concode_elem_sep ButtonModel getSelection concode_elem_sep void setSelected concode_elem_sep Enumeration<AbstractButton> getElements concode_elem_sep AbstractButton findButton concode_elem_sep boolean isSelected concode_elem_sep void remove
int function ( ) { return buttons . size ( ) ; }