单选按钮

package cn.rushangw.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo02 extends JFrame {
    public JButtonDemo02() {
        Container container = getContentPane();
        //将一个图片变成图标
        URL resource = JButtonDemo02.class.getResource("lADPD3W5ONBVGtTNBDjNB4A_1920_1080.jpg");
        Icon icon = new ImageIcon(resource);

        //单选框
        JRadioButton radioButton01 = new JRadioButton("JRadioButton01");
        JRadioButton radioButton02 = new JRadioButton("JRadioButton02");
        JRadioButton radioButton03 = new JRadioButton("JRadioButton03");

        //由于单选按钮只能选择一个，要给他们分组,一个组中只能选择一个
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(radioButton01);
        buttonGroup.add(radioButton02);
        buttonGroup.add(radioButton03);

        container.add(radioButton01,BorderLayout.CENTER);
        container.add(radioButton02,BorderLayout.NORTH);
        container.add(radioButton03,BorderLayout.SOUTH);


        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setVisible(true);
        setBounds(1,1,500,500);
    }

    public static void main(String[] args) {
        new JButtonDemo02();
    }
}