javaGUI– 单选框 JRadioButton _ 复选框 JCheckBox

单选框记得分组,要不然不是只能选一个 一个分组中只能选择一个 复选框可以选多个

package cn.usts.edu.lesson05;

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

public class JButtonDemo extends JFrame {
    public JButtonDemo() {
        this.setTitle("单选框/复选框");
        this.setBounds(100,100,500,500);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

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

        // 因为单选框智能选择一个,所以分组,每个组内只能选择一个
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton01);
        group.add(radioButton02);
        group.add(radioButton03);

        // 复选框
        JCheckBox checkBox01 = new JCheckBox("checkBox01");
        JCheckBox checkBox02 = new JCheckBox("checkBox02");
        JCheckBox checkBox03 = new JCheckBox("checkBox03");

        Container container = this.getContentPane();
        container.add(radioButton01,BorderLayout.WEST);
        container.add(radioButton02,BorderLayout.CENTER);
        container.add(radioButton03,BorderLayout.EAST);

        JPanel panel = new JPanel();
        panel.setLayout(new FlowLayout());
        panel.add(checkBox01);
        panel.add(checkBox02);
        panel.add(checkBox03);
        container.add(panel,BorderLayout.NORTH);
    }

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