一、单选框：

1.新建 new JRadioButton 单选按钮

2.单选按钮都放到add()一个 按钮组new ButtonGroup()里(ButtonGroup只有单选功能，不存在布局功能，所以要第三步，单独添加JRadioButton 到容器)

3.单独添加 单选按钮到容器，并设置布局

代码：

package GUI.Swing.图片按钮_单选框_多选框;

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

public class 单选框 extends JFrame {
    public 单选框() throws HeadlessException {
        this.setTitle("单选框");
        this.setVisible(true);
        this.setBounds(100,100,400,300);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        Container contentPane = this.getContentPane();
        /*
        单选框方法教程:
        new 3 个 JRadioButton 单选框，然后放到一个按钮组ButtonGroup里(按钮组只实现单选效果，不布局）
        在将3个单选按钮填加到容器并且布局
         */
        JRadioButton jarvan = new JRadioButton("jarvan");
        JRadioButton 半亩方糖 = new JRadioButton("半亩方糖");
        JRadioButton 时光 = new JRadioButton("时光");
        //add the JRadioButtons to the ButtonGroup
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(jarvan);
        buttonGroup.add(半亩方糖);
        buttonGroup.add(时光);
        //add the JRadioButtons to the contentPane ,and set the Layout
        contentPane.add(jarvan,BorderLayout.NORTH);
        contentPane.add(半亩方糖,BorderLayout.CENTER);
        contentPane.add(时光,BorderLayout.SOUTH);

    }

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

效果图

二、多选框（其实单选框不用ButtonGroup也能达到类似效果)：

和单选框类似，JRadioButton 变成 check

package GUI.Swing.图片按钮_单选框_多选框;

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

public class 多选框 extends JFrame {
    public 多选框() throws HeadlessException {
        this.setTitle("多选框");
        this.setBounds(100, 100, 400, 400);
        this.setVisible(true);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        /*
        复选框教程：
        1.新建 Checkbox()
        2.将复选框添加到容器
         */
        Checkbox jarvan = new Checkbox("jarvan");
        Checkbox shiGuang = new Checkbox("shiGuang");
        Checkbox 半亩方糖 = new Checkbox("半亩方糖");
        //add checkBox to the contentPane
        Container contentPane = this.getContentPane();
        contentPane.add(jarvan, BorderLayout.NORTH);
        contentPane.add(shiGuang, BorderLayout.CENTER);
        contentPane.add(半亩方糖, BorderLayout.SOUTH);

    }

    public static void main(String[] args) {
        new 多选框();

    }
}

效果图

#### 问题：汉字无法显示的编码问题。

实现了单选、多选和下拉框的实现，

以及监听当按下提交时，选择了哪些选项，

以及提交后，选项的状态重置

单选框

效果如下：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.BoxLayout;
import javax.swing.BorderFactory;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JButton;
import javax.swing.ButtonGroup;
import javax.swing.JRadioButton;

public class DanXuan extends JFrame
{
	JPanel panelDanXuan;
	JLabel labTiMu;
	JButton btSubmit;
	//创建一个按钮组
	ButtonGroup option;
	JRadioButton optionA;
	JRadioButton optionB;
	JRadioButton optionC;
	JRadioButton optionD;
	public void init()
	{
		
		panelDanXuan = new JPanel();
		labTiMu = new JLabel("题目1");
		btSubmit = new JButton("提交");
		option = new ButtonGroup();
		optionA = new JRadioButton("A.");
		optionB = new JRadioButton("B.");
		optionC = new JRadioButton("C.");
		optionD = new JRadioButton("D.");
		
		//把按钮加到同一个按钮组
		option.add(optionA);
		option.add(optionB);
		option.add(optionC);
		option.add(optionD);
		
		//将按钮按列排列
		panelDanXuan.setLayout(new BoxLayout(panelDanXuan,BoxLayout.Y_AXIS));
		
		panelDanXuan.add(optionA);
		panelDanXuan.add(optionB);
		panelDanXuan.add(optionC);
		panelDanXuan.add(optionD);
		panelDanXuan.add(btSubmit);
		//设置边框
		panelDanXuan.setBorder(BorderFactory.createTitledBorder("单选"));
		
		this.add(labTiMu,BorderLayout.NORTH);
		this.add(panelDanXuan);
		this.setTitle("单选");
		this.setSize(500,300);
		this.setLocation(100, 100);
		this.setResizable(false);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		this.repaint();
		
		//监听确认按钮
		btSubmit.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				if(optionA.isSelected() == true)
				{
					
				}
				else if(optionB.isSelected() == true)
				{
					
				}
				else if(optionC.isSelected() == true)
				{
					
				}
				else if(optionD.isSelected() == true)
				{
					
				}
				else			//没有选按钮便提交
				{
					
				}
				//点击确认按钮后，改变题目的值
				labTiMu.setText("题目2");
				//重置按钮的值
				option.clearSelection();
			}
		});
	}
	public static void main(String[] args)
	{
		DanXuan test = new DanXuan();
		test.init();
	}
}

复选框

效果如下：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.BoxLayout;
import javax.swing.BorderFactory;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JButton;
import javax.swing.ButtonGroup;
import javax.swing.JRadioButton;
import javax.swing.JCheckBox;

public class DuoXuan extends JFrame
{
	JPanel panelDuoXuan;
	JLabel labTiMu;
	JButton btSubmit;
	//创建一个按钮组
	JCheckBox optionA;
	JCheckBox optionB;
	JCheckBox optionC;
	JCheckBox optionD;
	public void init()
	{
		panelDuoXuan = new JPanel();
		labTiMu = new JLabel("题目1");
		btSubmit = new JButton("提交");
		optionA = new JCheckBox("A.");
		optionB = new JCheckBox("B.");
		optionC = new JCheckBox("C.");
		optionD = new JCheckBox("D.");
		
		//将按钮按列排列
		panelDuoXuan.setLayout(new BoxLayout(panelDuoXuan,BoxLayout.Y_AXIS));
		
		JButton c=new JButton(" ");
	    c.setContentAreaFilled(false);		//按键透明
	  	c.setBorderPainted(false);			//边框透明
		c.setEnabled(false);
		
		panelDuoXuan.add(optionA);
		panelDuoXuan.add(optionB);
		panelDuoXuan.add(optionC);
		panelDuoXuan.add(optionD);
		panelDuoXuan.add(btSubmit);
		//设置边框
		panelDuoXuan.setBorder(BorderFactory.createTitledBorder("多选"));
		
		this.add(labTiMu,BorderLayout.NORTH);
		this.add(panelDuoXuan);
		
		this.setTitle("多选");
		this.setSize(500,300);
		this.setLocation(100, 100);
		this.setResizable(false);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		this.repaint();
		
		//监听确认按钮
		btSubmit.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				if(optionA.isSelected() == true)
				{
				}
				if(optionB.isSelected() == true)
				{
				}
				if(optionC.isSelected() == true)
				{
					
				}
				if(optionD.isSelected() == true)
				{
					
				}
				//没有选按钮便提交
				if(optionA.isSelected() == false && optionB.isSelected() == false 
				&& optionC.isSelected() == false && optionD.isSelected() == false)
				{
					
				}
				//点击确认按钮后，改变题目的值
				labTiMu.setText("题目2");
				//重置按钮的值
				optionA.setSelected(false);
				optionB.setSelected(false);
				optionC.setSelected(false);
				optionD.setSelected(false);
			}
		});
	}
	public static void main(String[] args)
	{
		DuoXuan test = new DuoXuan();
		test.init();
	}
}

下拉框

效果如下：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.BoxLayout;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.ButtonGroup;
import javax.swing.JRadioButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;

public class XiaLaKuang extends JFrame
{
	JPanel panelXiaLaKuang;
	JLabel labTiMu;
	JComboBox xiaLa;
	JButton btSubmit;
	
	public void init()
	{
		panelXiaLaKuang = new JPanel();
		labTiMu = new JLabel("题目1");
		btSubmit = new JButton("提交");
		
		xiaLa = new JComboBox();
		xiaLa.addItem("A.");
		xiaLa.addItem("B.");
		xiaLa.addItem("C.");
		xiaLa.addItem("D.");
		
		panelXiaLaKuang.add(xiaLa);
		panelXiaLaKuang.add(btSubmit);
		//设置边框
		panelXiaLaKuang.setBorder(BorderFactory.createTitledBorder("下拉框"));
		
		this.add(labTiMu);
		this.add(panelXiaLaKuang);
		
		this.setLayout(new GridLayout(2,1));
		this.setTitle("下拉框");
		this.setSize(500,300);
		this.setLocation(100, 100);
		this.setResizable(false);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		this.repaint();
		
		//监听确认按钮
		btSubmit.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				if(xiaLa.getSelectedIndex() == 0)
				{
					System.out.println("A");
				}
				else if(xiaLa.getSelectedIndex() == 1)
				{
					System.out.println("B");
				}
				else if(xiaLa.getSelectedIndex() == 2)
				{
					
				}
				else if(xiaLa.getSelectedIndex() == 3)
				{
					
				}
				//点击确认按钮后，改变题目的值
				labTiMu.setText("题目2");
				//重置按钮的值
				xiaLa.setSelectedIndex(0);
			}
		});
	}
	public static void main(String[] args)
	{
		XiaLaKuang test = new XiaLaKuang();
		test.init();
	}
}

1.拖动几个复选框控件(可以在控件属性设置默认选中)

2.后台代码:

//遍历面板的所有控件，找到属于JCheckBox的控件，然后
//isSelected()方法判断是否选中
for(Component c:jPanel4.getComponents()){
            
            if(c instanceof JCheckBox){
                if(((JCheckBox)c).isSelected()){
                    System.out.println("爱好："+((JCheckBox)c).getText());
                }
            }
        }