在学习枯燥的Java中遇见美丽的Jframe，窗体中的单选按钮（JRadioButton）

Posted 2021-01-27 逐梦武威

package com.company;

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

public class Main  extends JFrame{
    public Main(){
        setBounds(100,100,180,110);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container c=getContentPane();
        c.setLayout(new FlowLayout());

        JRadioButton left=new JRadioButton("向右走");
        JRadioButton right=new JRadioButton("向左走");
        c.add(left);
        c.add(right);
        ButtonGroup group=new ButtonGroup();//按钮组
        group.add(left);//把按钮放在按钮组中
        group.add(right);
        left.setSelected(true);
        JButton bun=new JButton("打印");
        bun.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println(left.getText()+"按钮选中状态："+left.isSelected());
                System.out.println(right.getText()+"按钮选中状态："+right.isSelected());
                group.clearSelection();//按钮组选项清空
            }
        });
        c.add(bun);
        setVisible(true);
    }

    public static void main(String[] args) {
        new Main();
    // write your code here
    }
}

package com.company;

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

public class Main  extends JFrame{
    public Main(){
        setBounds(100,100,180,110);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container c=getContentPane();
        c.setLayout(new FlowLayout());

        JRadioButton left=new JRadioButton("向右走");
        JRadioButton right=new JRadioButton("向左走");
        c.add(left);
        c.add(right);
        ButtonGroup group=new ButtonGroup();//按钮组
        group.add(left);//把按钮放在按钮组中
        group.add(right);
        left.setSelected(true);
        JButton bun=new JButton("打印");
        bun.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println(left.getText()+"按钮选中状态："+left.isSelected());
                System.out.println(right.getText()+"按钮选中状态："+right.isSelected());
                group.clearSelection();//按钮组选项清空
            }
        });
        c.add(bun);
        setVisible(true);
    }

    public static void main(String[] args) {
        new Main();
    // write your code here
    }
}

package com.company;

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

public class Main  extends JFrame{
    public Main(){
        setBounds(100,100,180,110);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container c=getContentPane();
        c.setLayout(new FlowLayout());

        JRadioButton left=new JRadioButton("向右走");
        JRadioButton right=new JRadioButton("向左走");
        c.add(left);
        c.add(right);
        ButtonGroup group=new ButtonGroup();//按钮组
        group.add(left);//把按钮放在按钮组中
        group.add(right);
        left.setSelected(true);
        JButton bun=new JButton("打印");
        bun.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println(left.getText()+"按钮选中状态："+left.isSelected());
                System.out.println(right.getText()+"按钮选中状态："+right.isSelected());
                group.clearSelection();//按钮组选项清空
            }
        });
        c.add(bun);
        setVisible(true);
    }

    public static void main(String[] args) {
        new Main();
    // write your code here
    }
}