请教:JRadioButton例题编译时的问题?
代码如下:
import javax.swing.*;
public class ChooseTeam4 extends JFrame {
JRadioButton[] teams=new JRadioButton[4];
public ChooseTeam4(){
super("Chooseteam");
setSize(200,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
teams[0]=new JRadioButton("333");
teams[1]=new JRadioButton("34132",true);
teams[2]=new JRadioButton("rewq");
teams[3]=new JRadioButton("cvc");
JPanel pane=new JPanel();
ButtonGroup group=new ButtonGroup();
for (int i=0;i<teams.length;i++){
group.add(teams[i]);
pane.add(teams[i]);
}
setContentPane(pane);
show();
}
public static void main(String[] arguments){
ChooseTeam4 ct=new ChooseTeam4();
}
}
编译时错误如下:
ChooseTeam4.java [16:1] No method found matching add(JRadioButton)
group.add(teams[i]);
^
1 error
我在其它有关于JRadioButton编译时出现同样的编译提示,请问这个问题到底出在哪里?