图片按钮，单选框，多选框

package lesson5;

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

public class JButtonDemo01 extends JFrame {

    public JButtonDemo01() throws HeadlessException {
        Container container=this.getContentPane();
        //将一个图片变为一个图标
     URL resource = JButtonDemo01.class.getResource("luna.jpg");
        ImageIcon icon;
        icon = new ImageIcon(resource);
        //把这个图标放在按钮上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("图片按钮");
        //add
        container.add(button);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


    }

    public static void main(String[] args) {
      new JButtonDemo01();
    }
}

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package lesson5;

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

public class JButtonDemo02 extends JFrame {

    public JButtonDemo02() throws HeadlessException {
        Container container=this.getContentPane();
        //将一个图片变为一个图标
       // URL resource = JButtonDemo01.class.getResource("luna.jpg");
       // ImageIcon icon;
        //icon = new ImageIcon(resource);
        //单选框
        JRadioButton radioButton01 = new JRadioButton("JRadioButton01");
        JRadioButton radioButton02 = new JRadioButton("JRadioButton02");
        JRadioButton radioButton03 = new JRadioButton("JRadioButton03");
        //由于单选框只能选择一个，分组
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton01);
        group.add(radioButton02);
        group.add(radioButton03);

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


        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


    }

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

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package lesson5;

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

public class JButtonDemo03 extends JFrame {

    public JButtonDemo03() throws HeadlessException {
        Container container=this.getContentPane();
        //多选框
        JCheckBox checkBox01 = new JCheckBox("checkBox01");
        JCheckBox checkBox02 = new JCheckBox("checkBox02");
        JCheckBox checkBox03 = new JCheckBox("checkBox03");

        container.add(checkBox01,BorderLayout.NORTH);
        container.add(checkBox02,BorderLayout.SOUTH);



        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


    }

    public static void main(String[] args) {
        new JButtonDemo03();
    }
}