Радіокнопка Swing

JRadioButton r1=new JRadioButton("A) Male");

JRadioButton r2=new JRadioButton("B) Female");

r1.setBounds(75,50,100,30);

r2.setBounds(75,100,100,30);

ButtonGroup bg=new ButtonGroup();

bg.add(r1);

bg.add(r2);

if(r1.isSelected()){ 

JOptionPane.showMessageDialog(this,"You are Male.");

}