public class JRadioButton
extends JToggleButton implements Accessible

java.lang.Object
 Ｌ java.awt.Component
     Ｌ java.awt.Container
         Ｌ javax.swing.JComponent
             Ｌ javax.swing.AbstractButton
                 Ｌ javax.swing.JToggleButton
                     Ｌ javax.swing.JRadioButton

JRadioButtonクラスのオブジェクトを作成

JRadioButton
public JRadioButton()

JRadioButton
public JRadioButton(String text)

JRadioButton radio1 = new JRadioButton();
JRadioButton radio2 = new JRadioButton("ラジオボタン");

表示文字列の設定

setText
public void setText(String text)

JRadioButton radio = new JRadioButton();
radio.setText("東京都");

サンプルプログラム

/**
 * ラジオボタンの作成と表示文字列の設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import java.awt.Container;
import java.awt.BorderLayout;

class SSample1_1 extends JFrame{
  public static void main(String args[]){
    SSample1_1 frame = new SSample1_1("タイトル");
    frame.setVisible(true);
  }

  SSample1_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton();
    JRadioButton radio2 = new JRadioButton("Apple");
    JRadioButton radio3 = new JRadioButton();
    radio3.setText("Orange");

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

コンストラクタで指定

JRadioButton
public JRadioButton(String text, boolean selected)

JRadioButton radio = new JRadioButton("ラジオボタン", true);

メソッドを使って設定

setSelected
public void setSelected(boolean b)

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setSelected(true);

サンプルプログラム

/**
 * 選択/非選択の設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import java.awt.Container;
import java.awt.BorderLayout;

class SSample2_1 extends JFrame{
  public static void main(String args[]){
    SSample2_1 frame = new SSample2_1("タイトル");
    frame.setVisible(true);
  }

  SSample2_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Peach", false);
    JRadioButton radio2 = new JRadioButton("Apple", true);
    JRadioButton radio3 = new JRadioButton("Orange");
    radio3.setSelected(true);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

ButtonGroupクラス

public class ButtonGroup 
extends Object implements Serializable

java.lang.Object
 Ｌ javax.swing.ButtonGroup

ButtonGroup
public ButtonGroup()

ButtonGroup group = new ButtonGroup();

ボタングループにラジオボタンを追加する

add
public void add(AbstractButton b)

JRadioButton radio1 = new JRadioButton("既婚");
JRadioButton radio2 = new JRadioButton("独身");

ButtonGroup group = new ButtonGroup();
group.add(radio1);
group.add(radio2);

ボタングループからラジオボタンを削除する

remove
public void remove(AbstractButton b)

JRadioButton radio1 = new JRadioButton("既婚");
JRadioButton radio2 = new JRadioButton("独身");
JRadioButton radio3 = new JRadioButton("不明");

ButtonGroup group = new ButtonGroup();
group.add(radio1);
group.add(radio2);
group.add(radio3);

group.remove(radio3);

サンプルプログラム

/**
 * ボタングループの作成とラジオボタンの追加/削除
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;

class SSample3_1 extends JFrame{
  public static void main(String args[]){
    SSample3_1 frame = new SSample3_1("タイトル");
    frame.setVisible(true);
  }

  SSample3_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Peach");
    JRadioButton radio2 = new JRadioButton("Apple");
    JRadioButton radio3 = new JRadioButton("Orange");
    JRadioButton radio4 = new JRadioButton("Grape");

    JRadioButton radio5 = new JRadioButton("Peach");
    JRadioButton radio6 = new JRadioButton("Apple");
    JRadioButton radio7 = new JRadioButton("Orange");
    JRadioButton radio8 = new JRadioButton("Grape");

    ButtonGroup group = new ButtonGroup();
    group.add(radio5);
    group.add(radio6);
    group.add(radio7);
    group.add(radio8);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);
    p.add(radio5);
    p.add(radio6);
    p.add(radio7);
    p.add(radio8);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

clearSelection
public void clearSelection()

JRadioButton radio1 = new JRadioButton("既婚");
JRadioButton radio2 = new JRadioButton("独身");

ButtonGroup group = new ButtonGroup();
group.add(radio1);
group.add(radio2);

group.clearSelection();

サンプルプログラム

/**
 * グループ内の選択をクリア
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JButton;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class SSample4_1 extends JFrame{
  ButtonGroup group;

  public static void main(String args[]){
    SSample4_1 frame = new SSample4_1("タイトル");
    frame.setVisible(true);
  }

  SSample4_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Peach");
    JRadioButton radio2 = new JRadioButton("Apple");
    JRadioButton radio3 = new JRadioButton("Orange");
    JRadioButton radio4 = new JRadioButton("Grape");

    group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);
    group.add(radio4);

    JButton button = new JButton("clear");
    button.addActionListener(
      new ActionListener(){
        public void actionPerformed(ActionEvent event){
          group.clearSelection();
        }
      }
    );

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);
    p.add(button);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

setForeground
public void setForeground(Color fg)

JRadioButton radio1 = new JRadioButton("デスクトップ");
JRadioButton radio2 = new JRadioButton("ノートPC");

radio1.setForeground(Color.RED);
radio2.setForeground(Color.WHITE);

setBackground
public void setBackground(Color bg)

JRadioButton radio1 = new JRadioButton("デスクトップ");
JRadioButton radio2 = new JRadioButton("ノートPC"); 

radio1.setBackground(Color.RED);
radio2.setBackground(Color.WHITE);

透明/非透明の切り替え

setOpaque
public void setOpaque(boolean isOpaque)

JRadioButton radio1 = new JRadioButton("デスクトップ");
JRadioButton radio2 = new JRadioButton("ノートPC");

radio1.setOpaque(true);
radio2.setOpaque(false);

サンプルプログラム

/**
 * 前景色と背景色の設定と透明/非透明の切り替え
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Color;

class SSample5_1 extends JFrame{
  public static void main(String args[]){
    SSample5_1 frame = new SSample5_1("タイトル");
    frame.setVisible(true);
  }

  SSample5_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();
    p.setBackground(Color.PINK);

    JRadioButton radio1 = new JRadioButton("Peach");
    JRadioButton radio2 = new JRadioButton("Apple");
    radio2.setForeground(Color.WHITE);
    radio2.setOpaque(false);
    JRadioButton radio3 = new JRadioButton("Orange");
    radio3.setForeground(Color.RED);
    radio3.setBackground(Color.WHITE);
    JRadioButton radio4 = new JRadioButton("Grape");
    radio4.setBackground(Color.YELLOW);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);
    group.add(radio4);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

setFont
public void setFont(Font font)

JRadioButton radio1 = new JRadioButton("デスクトップ");
JRadioButton radio2 = new JRadioButton("ノートPC");

radio1.setFont(new Font("ＭＳ ゴシック", Font.BOLD, 16));
radio2.setFont(new Font("Arial", Font.PLAIN, 24));

サンプルプログラム

/**
 * 文字列のフォントを設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Font;

class SSample6_1 extends JFrame{
  public static void main(String args[]){
    SSample6_1 frame = new SSample6_1("タイトル");
    frame.setVisible(true);
  }

  SSample6_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Peach");
    JRadioButton radio2 = new JRadioButton("Apple");
    radio2.setFont(new Font("Arial", Font.BOLD, 32));
    JRadioButton radio3 = new JRadioButton("Orange");
    radio3.setFont(new Font("Century", Font.PLAIN, 48));
    JRadioButton radio4 = new JRadioButton("Grape");
    radio4.setFont(new Font("Century", Font.ITALIC, 24));

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);
    group.add(radio4);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

サイズの設定

setPreferredSize
public void setPreferredSize(Dimension preferredSize)

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setPreferredSize(new Dimension(100, 50));

余白の設定

setMargin
public void setMargin(Insets m)

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setMargin(new Insets(10, 10, 10, 10));

サンプルプログラム

/**
 * サイズ/余白などの設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Insets;


class SSample7_1 extends JFrame{
  public static void main(String args[]){
    SSample7_1 frame = new SSample7_1("タイトル");
    frame.setVisible(true);
  }

  SSample7_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Peach");
    JRadioButton radio2 = new JRadioButton("Apple");
    radio2.setBackground(Color.WHITE);
    radio2.setPreferredSize(new Dimension(50, 50));
    JRadioButton radio3 = new JRadioButton("Orange");
    radio3.setPreferredSize(new Dimension(200, 100));
    radio3.setBackground(Color.PINK);
    JRadioButton radio4 = new JRadioButton("Grape");
    radio4.setMargin(new Insets(10, 20, 10, 20));
    radio4.setBackground(Color.YELLOW);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);
    group.add(radio4);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

setBorderPainted
public void setBorderPainted(boolean b)

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setBorderPainted(true);

setBorder
public void setBorder(Border border)

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setBorderPainted(true);
LineBorder border = new LineBorder(Color.RED, 2, true);
radio.setBorder(border);

サンプルプログラム

/**
 * 枠線の設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.border.LineBorder;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Insets;


class SSample8_1 extends JFrame{
  public static void main(String args[]){
    SSample8_1 frame = new SSample8_1("タイトル");
    frame.setVisible(true);
  }

  SSample8_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Peach");
    JRadioButton radio2 = new JRadioButton("Apple");
    radio2.setBorderPainted(true);

    JRadioButton radio3 = new JRadioButton("Orange");
    radio3.setBorderPainted(true);
    radio3.setPreferredSize(new Dimension(100, 50));

    JRadioButton radio4 = new JRadioButton("Grape");
    radio4.setMargin(new Insets(10, 20, 10, 20));
    radio4.setBackground(Color.YELLOW);

    LineBorder border = new LineBorder(Color.PINK, 2, true);

    JRadioButton radio5 = new JRadioButton("Banana");
    radio5.setBorderPainted(true);
    radio5.setPreferredSize(new Dimension(100, 50));
    radio5.setBorder(border);

    JRadioButton radio6 = new JRadioButton("Melon");
    radio6.setBorderPainted(true);
    radio6.setMargin(new Insets(10, 10, 10, 10));
    radio6.setBorder(border);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);
    group.add(radio4);
    group.add(radio5);
    group.add(radio6);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);
    p.add(radio5);
    p.add(radio6);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

水平方向の位置

setHorizontalAlignment
public void setHorizontalAlignment(int alignment)

JRadioButton.RIGHT     右詰 
JRadioButton.LEFT      左詰
JRadioButton.CENTER    中央
JRadioButton.LEADING   左詰(デフォルト)
JRadioButton.TRAILING  右詰

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setHorizontalAlignment(JRadioButton.CENTER);

垂直方向の位置

setVerticalAlignment
public void setVerticalAlignment(int alignment)

JRadioButton.CENTER  中央(デフォルト)
JRadioButton.TOP     上端
JRadioButton.BOTTOM  下端

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setVerticalAlignment(JRadioButton.TOP);

サンプルプログラム

/**
 * ラジオボタン内での文字列の位置
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;


class SSample9_1 extends JFrame{
  public static void main(String args[]){
    SSample9_1 frame = new SSample9_1("タイトル");
    frame.setVisible(true);
  }

  SSample9_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Peach");
    radio1.setPreferredSize(new Dimension(150, 60));
    radio1.setBackground(Color.PINK);

    JRadioButton radio2 = new JRadioButton("Apple");
    radio2.setPreferredSize(new Dimension(150, 60));
    radio2.setHorizontalAlignment(JRadioButton.CENTER);
    radio2.setVerticalAlignment(JRadioButton.TOP);
    radio2.setBackground(Color.YELLOW);

    JRadioButton radio3 = new JRadioButton("Orange");
    radio3.setPreferredSize(new Dimension(150, 60));
    radio3.setHorizontalAlignment(JRadioButton.RIGHT);
    radio3.setVerticalAlignment(JRadioButton.BOTTOM);
    radio3.setBackground(Color.WHITE);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

コンストラクタを使う

JRadioButton
public JRadioButton(Icon icon)

JRadioButton
public JRadioButton(String text, boolean selected)

ImageIcon icon = new ImageIcon("./img/sample.png");

JRadioButton radio1 = new JRadioButton(icon);
JRadioButton radio2 = new JRadioButton("ラジオボタン", icon);

選択/非選択も同時に指定する

JRadioButton
public JRadioButton(Icon icon, boolean selected)

JRadioButton
public JRadioButton(String text, Icon icon, boolean selected)

ImageIcon icon = new ImageIcon("./img/sample.png");

JRadioButton radio1 = new JRadioButton(icon, true);
JRadioButton radio2 = new JRadioButton("ラジオボタン", icon, false);

表示画像の設定

setIcon
public void setIcon(Icon defaultIcon)

JRadioButton radio = new JRadioButton("ラジオボタン");

ImageIcon icon = new ImageIcon("./img/sample.png");
radio.setIcon(icon);

ImageIcon icon = new ImageIcon("./img/sample.png");
JRadioButton radio = new JRadioButton(icon);

radio.setText("チェックボックス");

サンプルプログラム

/**
 * 画像の表示
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import java.awt.Container;
import java.awt.BorderLayout;


class SSample10_1 extends JFrame{
  public static void main(String args[]){
    SSample10_1 frame = new SSample10_1("タイトル");
    frame.setVisible(true);
  }

  SSample10_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    ImageIcon icon1 = new ImageIcon("./calculator.png");
    ImageIcon icon2 = new ImageIcon("./camera.png");
    ImageIcon icon3 = new ImageIcon("./clock.png");
    ImageIcon icon4 = new ImageIcon("./computer.png");

    JRadioButton radio1 = new JRadioButton(icon1);
    JRadioButton radio2 = new JRadioButton("camera", icon2);
    JRadioButton radio3 = new JRadioButton(icon3, true);
    JRadioButton radio4 = new JRadioButton("pc");
    radio4.setIcon(icon4);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);
    group.add(radio4);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

setSelectedIcon
public void setSelectedIcon(Icon selectedIcon)

ImageIcon icon = new ImageIcon("./img/sample.png");
ImageIcon icon_select = new ImageIcon("./img/select.png");

JRadioButton radio = new JRadioButton(icon);
radio..setSelectedIcon(icon_select);

サンプルプログラム

/**
 * 選択状態時の画像の設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import java.awt.Container;
import java.awt.BorderLayout;

class SSample11_1 extends JFrame{
  public static void main(String args[]){
    SSample11_1 frame = new SSample11_1("タイトル");
    frame.setVisible(true);
  }

  SSample11_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    ImageIcon icon1 = new ImageIcon("./calculator.png");
    ImageIcon icon2 = new ImageIcon("./camera.png");
    ImageIcon icon3 = new ImageIcon("./clock.png");
    ImageIcon icon4 = new ImageIcon("./computer.png");

    ImageIcon sicon1 = new ImageIcon("./select_calculator.png");
    ImageIcon sicon2 = new ImageIcon("./select_camera.png");
    ImageIcon sicon3 = new ImageIcon("./select_clock.png");
    ImageIcon sicon4 = new ImageIcon("./select_computer.png");

    JRadioButton radio1 = new JRadioButton(icon1);
    radio1.setSelectedIcon(sicon1);
    JRadioButton radio2 = new JRadioButton(icon2, true);
    radio2.setSelectedIcon(sicon2);
    JRadioButton radio3 = new JRadioButton(icon3);
    radio3.setSelectedIcon(sicon3);
    JRadioButton radio4 = new JRadioButton(icon4);
    radio4.setSelectedIcon(sicon4);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);
    group.add(radio4);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);
    p.add(radio4);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

画像に対する文字列の水平位置

setHorizontalTextPosition
public void setHorizontalTextPosition(int textPosition)

JRadioButton.LEFT       左詰
JRadioButton.CENTER     中央
JRadioButton.RIGHT      右詰
JRadioButton.LEADING    左詰
JRadioButton.TRAILING   右詰 (デフォルト)

ImageIcon icon = new ImageIcon("./img/sample.png");

JRadioButton radio = new JRadioButton("ラジオボタン", icon);
radio.setHorizontalTextPosition(JRadioButton.CENTER);

画像に対する文字列の垂直位置

setVerticalTextPosition
public void setVerticalTextPosition(int textPosition)

JRadioButton.TOP     上端に合わせる
JRadioButton.CENTER  中央(デフォルト)
JRadioButton.BOTTOM  下端に合わせる

ImageIcon icon = new ImageIcon("./img/sample.png");

JRadioButton radio = new JRadioButton("ラジオボタン", icon);
radio.setVerticalTextPosition(JRadioButton.TOP);

画像と文字列の間隔

setIconTextGap
public void setIconTextGap(int iconTextGap)

ImageIcon icon = new ImageIcon("./img/sample.png");

JRadioButton radio = new JRadioButton("ラジオボタン", icon);
radio.setIconTextGap(10);

サンプルプログラム

/**
 * 文字列と画像の位置関係を設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Color;

class SSample12_1 extends JFrame{
  public static void main(String args[]){
    SSample12_1 frame = new SSample12_1("タイトル");
    frame.setVisible(true);
  }

  SSample12_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    ImageIcon icon = new ImageIcon("./camera.png");
    ImageIcon sicon = new ImageIcon("./select_camera.png");

    JRadioButton radio1 = new JRadioButton("Orange", true);
    radio1.setHorizontalTextPosition(JRadioButton.LEFT);
    radio1.setBackground(Color.WHITE);
    JRadioButton radio2 = new JRadioButton("Orange");
    radio2.setHorizontalTextPosition(JRadioButton.CENTER);
    radio2.setBackground(Color.YELLOW);
    JRadioButton radio3 = new JRadioButton("Orange");
    radio3.setHorizontalTextPosition(JRadioButton.RIGHT);
    radio3.setBackground(Color.PINK);

    JRadioButton radio4 = new JRadioButton("camera", icon);
    radio4.setSelectedIcon(sicon);
    radio4.setVerticalTextPosition(JRadioButton.TOP);
    JRadioButton radio5 = new JRadioButton("camera", icon, true);
    radio5.setSelectedIcon(sicon);
    radio5.setVerticalTextPosition(JRadioButton.CENTER);
    JRadioButton radio6 = new JRadioButton("camera", icon);
    radio6.setSelectedIcon(sicon);
    radio6.setVerticalTextPosition(JRadioButton.BOTTOM);

    JRadioButton radio7 = new JRadioButton("Orange");
    radio7.setBackground(Color.WHITE);
    JRadioButton radio8 = new JRadioButton("Orange");
    radio8.setBackground(Color.YELLOW);
    radio8.setIconTextGap(10);
    JRadioButton radio9 = new JRadioButton("Orange", true);
    radio9.setIconTextGap(20);
    radio9.setBackground(Color.PINK);

    ButtonGroup group1 = new ButtonGroup();
    group1.add(radio1);
    group1.add(radio2);
    group1.add(radio3);

    ButtonGroup group2 = new ButtonGroup();
    group2.add(radio4);
    group2.add(radio5);
    group2.add(radio6);

    ButtonGroup group3 = new ButtonGroup();
    group3.add(radio7);
    group3.add(radio8);
    group3.add(radio9);

    JPanel p1 = new JPanel();
    JPanel p2 = new JPanel();
    JPanel p3 = new JPanel();

    p1.add(radio1);
    p1.add(radio2);
    p1.add(radio3);
    p2.add(radio4);
    p2.add(radio5);
    p2.add(radio6);
    p3.add(radio7);
    p3.add(radio8);
    p3.add(radio9);


    Container contentPane = getContentPane();
    contentPane.add(p1, BorderLayout.NORTH);
    contentPane.add(p2, BorderLayout.CENTER);
    contentPane.add(p3, BorderLayout.SOUTH);
  }
}

ロールオーバー

setRolloverIcon
public void setRolloverIcon(Icon rolloverIcon)

ImageIcon icon = new ImageIcon("./img/sample.png");
ImageIcon rollover_icon = new ImageIcon("./img/roll.png");

JRadioButton radio = new JRadioButton("ラジオボタン", icon);
radio.setRolloverIcon(rollover_icon);

ラジオボタンが押された状態

setPressedIcon
public void setPressedIcon(Icon pressedIcon)

ImageIcon icon = new ImageIcon("./img/sample.png");
ImageIcon pressed_icon = new ImageIcon("./img/pressed.png");

JRadioButton radio = new JRadioButton("ラジオボタン", icon);
radio.setPressedIcon(pressed_icon);

無効

setDisabledIcon
public void setDisabledIcon(Icon disabledIcon)

setEnabled
public void setEnabled(boolean b)

ImageIcon icon = new ImageIcon("./img/sample.png");
ImageIcon disabled_icon = new ImageIcon("./img/disabled.png");

JRadioButton radio = new JRadioButton("ラジオボタン", icon);
radio.setDisabledIcon(pressed_icon);
radio.setEnabled(false);

サンプルプログラム

/**
 * ラジオボタンの様々な状態と状態別の画像の設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ImageIcon;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;

class SSample13_1 extends JFrame{
  public static void main(String args[]){
    SSample13_1 frame = new SSample13_1("タイトル");
    frame.setVisible(true);
  }

  SSample13_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    ImageIcon nicon = new ImageIcon("./camera.png");
    ImageIcon sicon = new ImageIcon("./s_camera.png");
    ImageIcon ricon = new ImageIcon("./r_camera.png");
    ImageIcon picon = new ImageIcon("./p_camera.png");
    ImageIcon dicon = new ImageIcon("./d_camera.png");

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Orange", nicon);
    radio1.setSelectedIcon(sicon);
    JRadioButton radio2 = new JRadioButton("Apple", nicon);
    radio2.setSelectedIcon(sicon);
    radio2.setPressedIcon(picon);
    radio2.setRolloverIcon(ricon);
    JRadioButton radio3 = new JRadioButton("Melon", nicon);
    radio3.setDisabledIcon(dicon);
    radio3.setEnabled(false);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

setMnemonic
public void setMnemonic(int mnemonic)

数値：
KeyEvent.VK_0 から KeyEvent.VK_9

アルファベット：
KeyEvent.VK_A から KeyEvent.VK_Z

JRadioButton radio = new JRadioButton("ラジオボタン");
radio.setMnemonic(KeyEvent.VK_N);

サンプルプログラム

/**
 * キーボードニーモニックの設定
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.event.KeyEvent;

class SSample14_1 extends JFrame{
  public static void main(String args[]){
    SSample14_1 frame = new SSample14_1("タイトル");
    frame.setVisible(true);
  }

  SSample14_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    JRadioButton radio1 = new JRadioButton("Orange");
    radio1.setMnemonic(KeyEvent.VK_O);
    JRadioButton radio2 = new JRadioButton("Apple");
    radio2.setMnemonic(KeyEvent.VK_A);
    JRadioButton radio3 = new JRadioButton("Banana");
    radio3.setMnemonic(KeyEvent.VK_N);

    ButtonGroup group = new ButtonGroup();
    group.add(radio1);
    group.add(radio2);
    group.add(radio3);

    p.add(radio1);
    p.add(radio2);
    p.add(radio3);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
  }
}

isSelected
public boolean isSelected()

JRadioButton radio = new JRadioButton("ラジオボタン");
boolean status = radio.isSelected();

サンプルプログラム

/**
 * 選択/非選択の状態を取得
*/
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class SSample15_1 extends JFrame implements ActionListener{
  JRadioButton[] radio;

  public static void main(String args[]){
    SSample15_1 frame = new SSample15_1("タイトル");
    frame.setVisible(true);
  }

  SSample15_1(String title){
    setTitle(title);
    setBounds(100, 100, 300, 250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    radio = new JRadioButton[3];
    radio[0] = new JRadioButton("Orange");
    radio[1] = new JRadioButton("Melon", true);
    radio[2] = new JRadioButton("Grape");

    ButtonGroup group = new ButtonGroup();
    group.add(radio[0]);
    group.add(radio[1]);
    group.add(radio[2]);

    p.add(radio[0]);
    p.add(radio[1]);
    p.add(radio[2]);

    JPanel buttonpanel = new JPanel();

    JButton button = new JButton("button");
    button.addActionListener(this);

    buttonpanel.add(button);

    Container contentPane = getContentPane();
    contentPane.add(p, BorderLayout.CENTER);
    contentPane.add(buttonpanel, BorderLayout.SOUTH);
  }

  public void actionPerformed(ActionEvent e){
    String name = "";

    for (int i = 0 ; i < radio.length; i++){
      if (radio[i].isSelected()){
        name = radio[i].getText();
      }
    }

    JLabel msg = new JLabel(name);
    JOptionPane.showMessageDialog(this, msg);
  }
}