JRadioButton的初始的是否可选性设置
各位大虾，小弟最近做java的课程大作业，遇到一个问题，就是创建了JRadioButton english，math...
然后，创建了一个JmenuItem sort，我想设置JRadioButton的初始可选性是不可选的，在点击了sort后，JRadioButton才变为可选的，请问这个设置JRadioButton的初始可选性的函数是什么啊！不胜感激！！

[解决办法]
jradio.setEnabled(false);
jradio.setEnabled(true);
[解决办法]
setEnable(false)
setEnable(true)
[解决办法]
这是一个具体的实例

Java code

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");    }}