public class JRadioButtonDemo1 extends JFrame {
    private boolean isEnable=false;
    private final ButtonGroup genderGroup=new ButtonGroup();
    private JRadioButton boyBtn=null;
    private JRadioButton girlBtn=null;

    public JRadioButtonDemo1(){}

    public JRadioButtonDemo1(String title){
        super(title);
        boyBtn=new JRadioButton("boy");
        girlBtn=new JRadioButton("girl");
        genderGroup.add(boyBtn);
        genderGroup.add(girlBtn);
         Enumeration<AbstractButton> btns=genderGroup.getElements();
         while(btns.hasMoreElements()){
                    AbstractButton btn=btns.nextElement();
                    btn.setEnabled(JRadioButtonDemo1.this.isEnable);
                }

        this.getContentPane().setLayout(new FlowLayout());
        this.getContentPane().add(boyBtn);
        this.getContentPane().add(girlBtn);
        final JButton radioCtl=new JButton("enable");
        radioCtl.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {
                //To change body of implemented methods use File | Settings | File Templates.
                if(JRadioButtonDemo1.this.isEnable){
                    radioCtl.setText("enable");
                }else{
                    radioCtl.setText("disable");
                }
                JRadioButtonDemo1.this.isEnable=!JRadioButtonDemo1.this.isEnable;

                Enumeration<AbstractButton> btns=genderGroup.getElements();
                while(btns.hasMoreElements()){
                    AbstractButton btn=btns.nextElement();
                    btn.setEnabled(JRadioButtonDemo1.this.isEnable);
                }
            }
        });
       this.getContentPane().add(radioCtl);
        girlBtn.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub
//                genderGroup.getSelection().g
                System.out.println(girlBtn.getText());
                System.out.println("girlBtn is selected is "+girlBtn.isSelected());

            }

        });

        boyBtn.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub
                System.out.println(boyBtn.getText());
                System.out.println("boyBtn is selected is "+boyBtn.isSelected());

            }

        });


        this.pack();
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocationRelativeTo(null);
        this.setVisible(true);
    }

    public static void main(String[] args){
        new JRadioButtonDemo1("Demo");
    }

}