Question

JAVA中JRadioButton如何使用add

请问要怎么改呢
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JCheckBoxRadioButtonTest extends JFrame{
JCheckBox t1=new JCheckBox("Visual Basic");
JCheckBox t2=new JCheckBox("Visual C++");
JCheckBox t3=new JCheckBox("Java");
ButtonGroup bg=new ButtonGroup();
JRadioButton r1=new JRadioButton("专科",true);
JRadioButton r2=new JRadioButton("本科",false);
JRadioButton r3=new JRadioButton("硕士");
JRadioButton r4=new JRadioButton("博士",false);
Label lb1=new Label("你的学历为：");
Label lb2=new Label("你精通的语言为：");
public JCheckBoxRadioButtonTest (String str){
super(str);
setLayout(new GridLayout(10,1));
bg.add(r1);
bg.add(r2);
bg.add(r3);
bg.add(r4);
add(lb1);
add(r1); //这里开始出错:类型 Container 中的方法 add（Component）对于参数（JRadioButton）不适用
add(r2);
add(r3);
add(r4);
add(lb2);
add(t1);
add(t2);
add(t3);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.out.println("program exited");
System.exit(0);
}
});
}
public static void main(String[] args){
JCheckBoxRadioButtonTest jCheckBoxRadioButtonTest=new JCheckBoxRadioButtonTest("个人基础信息统计");
jCheckBoxRadioButtonTest.setSize(400,250);
jCheckBoxRadioButtonTest.setVisible(true);
}
}

Answer 1

给你个例子,你看看吧,有什么问题再问我: import javax.swing.*; import java.awt.*; import java.awt.event.*; public class E extends ...