Java JRadioButton class example

JRadioButton

Java Swing Tutorial Explaining the JRadioButton Component. JRadioButton is similar to JCheckbox, except for the default icon for each class. A set of radio buttons can be associated as a group in which only one button at a time can be selected.

JRadioButton Source Code

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class JRadioButtonDemo extends JPanel { static JFrame frame; JLabel jlbPicture; RadioListener myListener = null; public JRadioButtonDemo() { // Create the radio buttons and assign Keyboard shortcuts using // Mnemonics JRadioButton jrbNumbers = new JRadioButton("Numbers"); jrbNumbers.setMnemonic(KeyEvent.VK_N); jrbNumbers.setActionCommand("numbers"); jrbNumbers.setSelected(true); JRadioButton jrbAlphabets = new JRadioButton("Alphabets"); jrbAlphabets.setMnemonic(KeyEvent.VK_A); jrbAlphabets.setActionCommand("alphabets"); JRadioButton jrbSymbols = new JRadioButton("Symbols"); jrbSymbols.setMnemonic(KeyEvent.VK_S); jrbSymbols.setActionCommand("symbols"); // Group the radio buttons. ButtonGroup group = new ButtonGroup(); group.add(jrbNumbers); group.add(jrbAlphabets); group.add(jrbSymbols); // Register an action listener for the radio buttons. myListener = new RadioListener(); jrbNumbers.addActionListener(myListener); jrbAlphabets.addActionListener(myListener); jrbSymbols.addActionListener(myListener); // Set up the picture label jlbPicture = new JLabel(new ImageIcon("" + "numbers" + ".jpg")); // Set the Default Image jlbPicture.setPreferredSize(new Dimension(177, 122)); // Put the radio buttons in a column in a panel JPanel jplRadio = new JPanel(); jplRadio.setLayout(new GridLayout(0, 1)); jplRadio.add(jrbNumbers); jplRadio.add(jrbAlphabets); jplRadio.add(jrbSymbols); setLayout(new BorderLayout()); add(jplRadio, BorderLayout.WEST); add(jlbPicture, BorderLayout.CENTER); setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20)); } /** Listens to the radio buttons. */ class RadioListener implements ActionListener { public void actionPerformed(ActionEvent e) { jlbPicture.setIcon(new ImageIcon("" + e.getActionCommand() + ".jpg")); } } public static void main(String s[]) { frame = new JFrame("JRadioButton Usage Demo"); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); frame.getContentPane().add(new JRadioButtonDemo(), BorderLayout.CENTER); frame.pack(); frame.setVisible(true); } }

Output

Download jRadioButton Source Code

Java JRadioButton Hierarchy

javax.swing
Class JRadioButton
java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.AbstractButton
javax.swing.JToggleButton
javax.swing.JRadioButton
All Implemented Interfaces:
Accessible, ImageObserver, ItemSelectable, MenuContainer, Serializable, SwingConstants

JRadioButton Constructor

JRadioButton()
Creates an initially unselected radio button with no set text.

JRadioButton(Action a)
Creates a radiobutton where properties are taken from the Action supplied.

JRadioButton(Icon icon)
Creates an initially unselected radio button with the specified image but no text.

JRadioButton(Icon icon, boolean selected)
Creates a radio button with the specified image and selection state, but no text.

JRadioButton(String text)
Creates an unselected radio button with the specified text.

JRadioButton(String text, boolean selected)
Creates a radio button with the specified text and selection state.

JRadioButton(String text, Icon icon)
Creates a radio button that has the specified text and image, and that is initially unselected.

JRadioButton(String text, Icon icon, boolean selected)
Creates a radio button that has the specified text, image, and selection state.