Java/Swing JFC/Button

Материал из Java эксперт
Версия от 18:01, 31 мая 2010; (обсуждение)
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Содержание

Action Button Sample

  
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;
public class ActionButtonSample {
  public static void main(String args[]) {
    JFrame frame = new JFrame("DefaultButton");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        String command = actionEvent.getActionCommand();
        System.out.println("Selected: " + command);
      }
    };
    Container content = frame.getContentPane();
    content.setLayout(new GridLayout(2, 2));
    JButton button1 = new JButton("Text Button");
    button1.setMnemonic(KeyEvent.VK_B);
    button1.setActionCommand("First");
    button1.addActionListener(actionListener);
    content.add(button1);
    Icon warnIcon = new ImageIcon("Warn.gif");
    JButton button2 = new JButton(warnIcon);
    button2.setActionCommand("Second");
    button2.addActionListener(actionListener);
    content.add(button2);
    JButton button3 = new JButton("Warning", warnIcon);
    button3.setActionCommand("Third");
    button3.addActionListener(actionListener);
    content.add(button3);
    String htmlButton = "<html><sup>HTML</sup> <sub><em>Button</em></sub><br>"
        + "<font color=\"#FF0080\"><u>Multi-line</u></font>";
    JButton button4 = new JButton(htmlButton);
    button4.setActionCommand("Fourth");
    button4.addActionListener(actionListener);
    content.add(button4);
    JRootPane rootPane = frame.getRootPane();
    rootPane.setDefaultButton(button2);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Adding a Disabled Icon to a JButton Component

 
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    // Icon will appear gray
    button.setEnabled(false);
    // Set a disabled version of icon
    Icon disabledIcon = new ImageIcon("d.gif");
    button.setDisabledIcon(disabledIcon);
    // To remove the disabled version of the icon, set to null
    button.setDisabledIcon(null);
    button.setDisabledIcon(new ImageIcon("icon.gif"));
  }
}





Adding an Icon to a JButton Component

 
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    // Retrieve the icon
    Icon icon = new ImageIcon("icon.gif");
    // Create an action with an icon
    Action action = new AbstractAction("Button Label", icon) {
      // This method is called when the button is pressed
      public void actionPerformed(ActionEvent evt) {
        // Perform action
      }
    };
    // Create the button; the icon will appear to the left of the label
    JButton button = new JButton(action);
  }
}





Adding a Rollover and Pressed Icon to a JButton Component

 
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    // Add rollover icon
    Icon rolloverIcon = new ImageIcon("r.gif");
    button.setRolloverIcon(rolloverIcon);
    // Add pressed icon
    Icon pressedIcon = new ImageIcon("p.gif");
    button.setPressedIcon(pressedIcon);
    // To remove rollover icon, set to null
    button.setRolloverIcon(null);
    // To remove pressed icon, set to null
    button.setPressedIcon(null);
  }
}





An example of radio button menu items in action

  
// An example of radio button menu items in action.
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.JTextPane;
import javax.swing.JToolBar;
import javax.swing.KeyStroke;
import javax.swing.border.BevelBorder;
public class RadioButtonMenuItemExample extends JPanel {
  public JTextPane pane;
  public JMenuBar menuBar;
  public JToolBar toolBar;
  public RadioButtonMenuItemExample() {
    menuBar = new JMenuBar();
    JMenu justifyMenu = new JMenu("Justify");
    ActionListener actionPrinter = new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        try {
          pane.getStyledDocument().insertString(0,"Action [" + e.getActionCommand()+ "] performed!\n", null);
        } catch (Exception ex) {
          ex.printStackTrace();
        }
      }
    };
    JRadioButtonMenuItem leftJustify = new JRadioButtonMenuItem("Left",new ImageIcon("1.gif"));
    leftJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
    leftJustify.setAccelerator(KeyStroke.getKeyStroke("L", Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
    leftJustify.addActionListener(actionPrinter);
    JRadioButtonMenuItem rightJustify = new JRadioButtonMenuItem("Right",new ImageIcon("2.gif"));
    rightJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
    rightJustify.setAccelerator(KeyStroke.getKeyStroke("R", Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
    rightJustify.addActionListener(actionPrinter);
    JRadioButtonMenuItem centerJustify = new JRadioButtonMenuItem("Center",new ImageIcon("3.gif"));
    centerJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
    centerJustify.setAccelerator(KeyStroke.getKeyStroke("M", Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
    centerJustify.addActionListener(actionPrinter);
    JRadioButtonMenuItem fullJustify = new JRadioButtonMenuItem("Full",new ImageIcon("4.gif"));
    fullJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
    fullJustify.setAccelerator(KeyStroke.getKeyStroke("F", Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
    fullJustify.addActionListener(actionPrinter);
    ButtonGroup group = new ButtonGroup();
    group.add(leftJustify);
    group.add(rightJustify);
    group.add(centerJustify);
    group.add(fullJustify);
    justifyMenu.add(leftJustify);
    justifyMenu.add(rightJustify);
    justifyMenu.add(centerJustify);
    justifyMenu.add(fullJustify);
    menuBar.add(justifyMenu);
    menuBar.setBorder(new BevelBorder(BevelBorder.RAISED));
  }
  public static void main(String s[]) {
    RadioButtonMenuItemExample example = new RadioButtonMenuItemExample();
    example.pane = new JTextPane();
    example.pane.setPreferredSize(new Dimension(250, 250));
    example.pane.setBorder(new BevelBorder(BevelBorder.LOWERED));
    JFrame frame = new JFrame("Menu Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setJMenuBar(example.menuBar);
    frame.getContentPane().add(example.pane, BorderLayout.CENTER);
    frame.pack();
    frame.setVisible(true);
  }
}





A Selected Button

  
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;
import javax.swing.AbstractButton;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JToggleButton;
import javax.swing.border.Border;
public class ASelectedButton {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Radio Buttons");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel(new GridLayout(0, 1));
    Border border = BorderFactory.createTitledBorder("Options");
    panel.setBorder(border);
    final ButtonGroup group = new ButtonGroup();
    AbstractButton abstract1 = new JRadioButton("One");
    panel.add(abstract1);
    group.add(abstract1);
    AbstractButton abstract2 = new JRadioButton("Two");
    panel.add(abstract2);
    group.add(abstract2);
    AbstractButton abstract3 = new JRadioButton("Three");
    panel.add(abstract3);
    group.add(abstract3);
    AbstractButton abstract4 = new JRadioButton("Four");
    panel.add(abstract4);
    group.add(abstract4);
    AbstractButton abstract5 = new JRadioButton("Five");
    panel.add(abstract5);
    group.add(abstract5);
    ActionListener aListener = new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        Enumeration elements = group.getElements();
        while (elements.hasMoreElements()) {
          AbstractButton button = (AbstractButton) elements
              .nextElement();
          if (button.isSelected()) {
            System.out.println("The winner is: " + button.getText());
            break;
          }
        }
        group.setSelected(null, true);
      }
    };
    JToggleButton button = new JToggleButton("Show Selected");
    button.addActionListener(aListener);
    Container container = frame.getContentPane();
    container.add(panel, BorderLayout.CENTER);
    container.add(button, BorderLayout.SOUTH);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Button Action Sample

  
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class ButtonActionSample {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Button Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton button = new JButton("Select Me");
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        System.out.println("I was selected.");
      }
    };
    MouseListener mouseListener = new MouseAdapter() {
      public void mousePressed(MouseEvent mouseEvent) {
        int modifiers = mouseEvent.getModifiers();
        if ((modifiers & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) {
          // Mask may not be set properly prior to Java 2
          // See SwingUtilities.isLeftMouseButton() for workaround
          System.out.println("Left button pressed.");
        }
        if ((modifiers & InputEvent.BUTTON2_MASK) == InputEvent.BUTTON2_MASK) {
          System.out.println("Middle button pressed.");
        }
        if ((modifiers & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) {
          System.out.println("Right button pressed.");
        }
      }
      public void mouseReleased(MouseEvent mouseEvent) {
        if (SwingUtilities.isLeftMouseButton(mouseEvent)) {
          System.out.println("Left button released.");
        }
        if (SwingUtilities.isMiddleMouseButton(mouseEvent)) {
          System.out.println("Middle button released.");
        }
        if (SwingUtilities.isRightMouseButton(mouseEvent)) {
          System.out.println("Right button released.");
        }
        System.out.println();
      }
    };
    button.addActionListener(actionListener);
    button.addMouseListener(mouseListener);
    Container contentPane = frame.getContentPane();
    contentPane.add(button, BorderLayout.SOUTH);
    frame.setSize(300, 100);
    frame.setVisible(true);
  }
}





Button action to change the panel background

  
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ButtonSettingBackground extends JPanel implements ActionListener {
  private JButton yellowButton = new JButton("Yellow");
  private JButton blueButton = new JButton("Blue");
  private JButton redButton = new JButton("Red");
  public ButtonSettingBackground() {
    add(yellowButton);
    add(blueButton);
    add(redButton);
    yellowButton.addActionListener(this);
    blueButton.addActionListener(this);
    redButton.addActionListener(this);
  }
  public void actionPerformed(ActionEvent evt) {
    Object source = evt.getSource();
    Color color = getBackground();
    if (source == yellowButton)
      color = Color.yellow;
    else if (source == blueButton)
      color = Color.blue;
    else if (source == redButton)
      color = Color.red;
    setBackground(color);
    repaint();
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame("ButtonTest");
    frame.setSize(300, 200);
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    Container contentPane = frame.getContentPane();
    contentPane.add(new ButtonSettingBackground());
    frame.show();
  }
}





Button demo: Mnemonic, alignment and action command

  
import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
import javax.swing.Icon;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
public class ButtonDemo extends JPanel implements ActionListener {
  protected JButton b1, b2, b3;
  public ButtonDemo() {
    Icon middleButtonIcon = new SquareIcon();
    b1 = new JButton("Disable middle button");
    b1.setVerticalTextPosition(AbstractButton.CENTER);
    b1.setHorizontalTextPosition(AbstractButton.LEADING);
    b1.setMnemonic(KeyEvent.VK_D);
    b1.setActionCommand("disable");
    b2 = new JButton("Middle button", middleButtonIcon);
    b2.setVerticalTextPosition(AbstractButton.BOTTOM);
    b2.setHorizontalTextPosition(AbstractButton.CENTER);
    b2.setMnemonic(KeyEvent.VK_M);
    b3 = new JButton("Enable middle button");
    //Use the default text position of CENTER, TRAILING (RIGHT).
    b3.setMnemonic(KeyEvent.VK_E);
    b3.setActionCommand("enable");
    b3.setEnabled(false);
    //Listen for actions on buttons 1 and 3.
    b1.addActionListener(this);
    b3.addActionListener(this);
    b1.setToolTipText("Click this button to disable the middle button.");
    b2.setToolTipText("This middle button does nothing when you click it.");
    b3.setToolTipText("Click this button to enable the middle button.");
    //Add Components to this container, using the default FlowLayout.
    add(b1);
    add(b2);
    add(b3);
  }
  public void actionPerformed(ActionEvent e) {
    if ("disable".equals(e.getActionCommand())) {
      b2.setEnabled(false);
      b1.setEnabled(false);
      b3.setEnabled(true);
    } else {
      b2.setEnabled(true);
      b1.setEnabled(true);
      b3.setEnabled(false);
    }
  }
  private static void createAndShowGUI() {
    JFrame.setDefaultLookAndFeelDecorated(true);
    JFrame frame = new JFrame("ButtonDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ButtonDemo newContentPane = new ButtonDemo();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);
    frame.pack();
    frame.setVisible(true);
  }
  public static void main(String[] args) {
    createAndShowGUI();
  }
  class SquareIcon implements Icon {
    private static final int SIZE = 10;
    public void paintIcon(Component c, Graphics g, int x, int y) {
      if (c.isEnabled()) {
        g.setColor(Color.RED);
      } else {
        g.setColor(Color.GRAY);
      }
      g.fillRect(x, y, SIZE, SIZE);
    }
    public int getIconWidth() {
      return SIZE;
    }
    public int getIconHeight() {
      return SIZE;
    }
  }
}





Button Html Demo

  
/* From http://java.sun.ru/docs/books/tutorial/index.html */
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractButton;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
/*
 * ButtonHtmlDemo.java is a 1.4 application that uses the following files:
 * images/right.gif images/middle.gif images/left.gif
 */
public class ButtonHtmlDemo extends JPanel implements ActionListener {
  protected JButton b1, b2, b3;
  public ButtonHtmlDemo() {
    ImageIcon leftButtonIcon = createImageIcon("images/right.gif");
    ImageIcon middleButtonIcon = createImageIcon("images/middle.gif");
    ImageIcon rightButtonIcon = createImageIcon("images/left.gif");
    b1 = new JButton("<html><center><b><u>D</u>isable</b><br>"
        + "<font color=#ffffdd>middle button</font>", leftButtonIcon);
    Font font = b1.getFont().deriveFont(Font.PLAIN);
    b1.setFont(font);
    b1.setVerticalTextPosition(AbstractButton.CENTER);
    b1.setHorizontalTextPosition(AbstractButton.LEADING); //aka LEFT, for
                                // left-to-right
                                // locales
    b1.setMnemonic(KeyEvent.VK_D);
    b1.setActionCommand("disable");
    b2 = new JButton("middle button", middleButtonIcon);
    b2.setFont(font);
    b2.setForeground(new Color(0xffffdd));
    b2.setVerticalTextPosition(AbstractButton.BOTTOM);
    b2.setHorizontalTextPosition(AbstractButton.CENTER);
    b2.setMnemonic(KeyEvent.VK_M);
    b3 = new JButton("<html><center><b><u>E</u>nable</b><br>"
        + "<font color=#ffffdd>middle button</font>", rightButtonIcon);
    b3.setFont(font);
    //Use the default text position of CENTER, TRAILING (RIGHT).
    b3.setMnemonic(KeyEvent.VK_E);
    b3.setActionCommand("enable");
    b3.setEnabled(false);
    //Listen for actions on buttons 1 and 3.
    b1.addActionListener(this);
    b3.addActionListener(this);
    b1.setToolTipText("Click this button to disable the middle button.");
    b2.setToolTipText("This middle button does nothing when you click it.");
    b3.setToolTipText("Click this button to enable the middle button.");
    //Add Components to this container, using the default FlowLayout.
    add(b1);
    add(b2);
    add(b3);
  }
  public void actionPerformed(ActionEvent e) {
    if ("disable".equals(e.getActionCommand())) {
      b2.setEnabled(false);
      b1.setEnabled(false);
      b3.setEnabled(true);
    } else {
      b2.setEnabled(true);
      b1.setEnabled(true);
      b3.setEnabled(false);
    }
  }
  /** Returns an ImageIcon, or null if the path was invalid. */
  protected static ImageIcon createImageIcon(String path) {
    java.net.URL imgURL = ButtonHtmlDemo.class.getResource(path);
    if (imgURL != null) {
      return new ImageIcon(imgURL);
    } else {
      System.err.println("Couldn"t find file: " + path);
      return null;
    }
  }
  /**
   * Create the GUI and show it. For thread safety, this method should be
   * invoked from the event-dispatching thread.
   */
  private static void createAndShowGUI() {
    //Make sure we have nice window decorations.
    JFrame.setDefaultLookAndFeelDecorated(true);
    //Create and set up the window.
    JFrame frame = new JFrame("ButtonHtmlDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    //Create and set up the content pane.
    ButtonHtmlDemo newContentPane = new ButtonHtmlDemo();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);
    //Display the window.
    frame.pack();
    frame.setVisible(true);
  }
  public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application"s GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        createAndShowGUI();
      }
    });
  }
}





Button icons, a default button, HTML in a button,and button mnemonics.

  
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
public class Main {
  public static void main(String args[]) {
    ImageIcon iconA = new ImageIcon("IconA.gif");
    ImageIcon iconDiable = new ImageIcon("disable.gif");
    ImageIcon iconOver = new ImageIcon("over.gif");
    ImageIcon iconPressed = new ImageIcon("IconAPressed.gif");
    final JButton jbtnA = new JButton("Alpha", iconA);
    JFrame jfrm = new JFrame();
    jfrm.setLayout(new FlowLayout());
    jfrm.setSize(300, 300);
    jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    jbtnA.setRolloverIcon(iconOver);
    jbtnA.setPressedIcon(iconPressed);
    jbtnA.setDisabledIcon(iconDiable);
    jfrm.getRootPane().setDefaultButton(jbtnA);
    jbtnA.setMnemonic(KeyEvent.VK_A);
    jbtnA.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        System.out.println("Alpha pressed. Beta is enabled.");
        jbtnA.setEnabled(!jbtnA.isEnabled());
      }
    });
    jfrm.add(jbtnA);
    jfrm.setVisible(true);
  }
}





Button with ICON and Multiline

  
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
public class ButtonSample {
  public static void main(String args[]) {
    String title = "JButton Sample";
    JFrame frame = new JFrame(title);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = frame.getContentPane();
    content.setLayout(new GridLayout(2, 2));
    JButton button1 = new JButton("Text Button");
    button1.setMnemonic(KeyEvent.VK_B);
    content.add(button1);
    Icon warnIcon = new ImageIcon("Warn.gif");
    JButton button2 = new JButton(warnIcon);
    content.add(button2);
    JButton button3 = new JButton("Warning", warnIcon);
    content.add(button3);
    String htmlButton = "<html><sup>HTML</sup> <sub><em>Button</em></sub><br>" +
      "<font color=\"#FF0080\"><u>Multi-line</u></font>";
    JButton button4 = new JButton(htmlButton);
    content.add(button4);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Changing the Label of a JButton Component

 
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    // Change the label
    button.setText("New Label");
    // Remove the label; this is useful for a button with only an icon
    button.setText(null);
  }
}





Create a JButton that does not show focus

  
//Create a JButton that does not show focus, does not paint a border, and
//displays different icons when rolled-over and pressed.
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
public class FancyButton extends JButton {
  public FancyButton(Icon icon, Icon pressed, Icon rollover) {
    super(icon);
    setFocusPainted(false);
    setRolloverEnabled(true);
    setRolloverIcon(rollover);
    setPressedIcon(pressed);
    setBorderPainted(false);
    setContentAreaFilled(false);
  }
  public static void main(String[] args) {
    FancyButton b1 = new FancyButton(new ImageIcon("1.gif"),new ImageIcon("2.gif"), new ImageIcon("3.gif"));
    FancyButton b2 = new FancyButton(new ImageIcon("4.gif"),new ImageIcon("1.gif"), new ImageIcon("2.gif"));
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container c = f.getContentPane();
    c.setLayout(new FlowLayout());
    c.add(b1);
    c.add(b2);
    f.pack();
    f.setVisible(true);
  }
}





Creating a JButton Component from Action

 
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    Action action = new AbstractAction("Button Label") {
      // This method is called when the button is pressed
      public void actionPerformed(ActionEvent evt) {
        // Perform action...
      }
    };
    // Create the button from the action
    JButton button = new JButton(action);
  }
}





Creating a Multiline Label for a JButton Component

 
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    String label = "<html>" + "This is a" + "<br>" + "swing button" + "</html>";
    // Create an action with the label
    Action action = new AbstractAction(label) {
      // This method is called when the button is pressed
      public void actionPerformed(ActionEvent evt) {
        // Perform action
      }
    };
    // Create the button
    JButton button = new JButton(action);
  }
}





Demonstration of button events including Action, Item and Change event types

  
//A simple demonstration of button events including Action, Item and Change event types.
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class JButtonEvents {
  public static void main(String[] args) {
    JButton jb = new JButton("Press Me");
    jb.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ev) {
        System.out.println("ActionEvent!");
      }
    });
    jb.addItemListener(new ItemListener() {
      public void itemStateChanged(ItemEvent ev) {
        System.out.println("ItemEvent!");
      }
    });
    jb.addChangeListener(new ChangeListener() {
      public void stateChanged(ChangeEvent ev) {
        System.out.println("ChangeEvent!");
      }
    });
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(jb);
    f.pack();
    f.setVisible(true);
  }
}





Displaying a Button with a Border

  
import java.awt.BorderLayout;
import java.awt.Container;
import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.border.Border;
public class ButtonBorderTest {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Fourth Button");
    Container contentPane = frame.getContentPane();
    Icon icon = new ImageIcon("jexp.gif");
    JButton b = new JButton("Button!");
    Border bored = BorderFactory.createMatteBorder(10, 5, 10, 5, icon);
    b.setBorder(bored);
    contentPane.add(b, BorderLayout.CENTER);
    frame.setSize(350, 200);
    frame.show();
  }
}





Displaying a Button with an Icon Label

  
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Container;
import java.awt.Graphics;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
public class ButtonIconTest {
  static class PieIcon implements Icon {
    Color color;
    public PieIcon(Color c) {
      color = c;
    }
    public int getIconWidth() {
      return 20;
    }
    public int getIconHeight() {
      return 20;
    }
    public void paintIcon(Component c, Graphics g, int x, int y) {
      g.setColor(color);
      g.fillArc(x, y, getIconWidth(), getIconHeight(), 45, 270);
    }
  }
  public static void main(String args[]) {
    JFrame frame = new JFrame("");
    Container contentPane = frame.getContentPane();
    Icon icon = new PieIcon(Color.red);
    JButton b = new JButton("Button!", icon);
    contentPane.add(b, BorderLayout.NORTH);
    b = new JButton(icon);
    contentPane.add(b, BorderLayout.SOUTH);
    frame.setSize(300, 200);
    frame.show();
  }
}





Displaying a Button with Various Label Alignments

  
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Container;
import java.awt.Graphics;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
public class MovingIconTest {
  static class PieIcon implements Icon {
    Color color;
    public PieIcon(Color c) {
      color = c;
    }
    public int getIconWidth() {
      return 20;
    }
    public int getIconHeight() {
      return 20;
    }
    public void paintIcon(Component c, Graphics g, int x, int y) {
      g.setColor(color);
      g.fillArc(x, y, getIconWidth(), getIconHeight(), 45, 270);
    }
  }
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    Container contentPane = frame.getContentPane();
    JButton b;
    Icon icon = new PieIcon(Color.red);
    b = new JButton("Default", icon);
    contentPane.add(b, BorderLayout.NORTH);
    b = new JButton("Text Left", icon);
    b.setHorizontalTextPosition(JButton.LEFT);
    contentPane.add(b, BorderLayout.SOUTH);
    b = new JButton("Text Up", icon);
    b.setHorizontalTextPosition(JButton.CENTER);
    b.setVerticalTextPosition(JButton.TOP);
    contentPane.add(b, BorderLayout.EAST);
    b = new JButton("Text Down", icon);
    b.setHorizontalTextPosition(JButton.CENTER);
    b.setVerticalTextPosition(JButton.BOTTOM);
    contentPane.add(b, BorderLayout.WEST);
    b = new JButton("Align Bottom Left", icon);
    b.setHorizontalAlignment(JButton.LEFT);
    b.setVerticalAlignment(JButton.BOTTOM);
    contentPane.add(b, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.show();
  }
}





Displaying a Button with Varying Icons

  
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Polygon;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
public class ChangingButtonIconTest {
  static class TriangleIcon implements Icon {
    String name;
    static class State {
      public static final int NORMAL = 0;
      public static final int PRESSED = 1;
      public static final int ROLLOVER = 2;
      private State() {
      }
    }
    int state;
    Color color;
    public TriangleIcon(Color c, int state) {
      color = c;
      this.state = state;
    }
    public int getIconWidth() {
      return 20;
    }
    public int getIconHeight() {
      return 20;
    }
    public void paintIcon(Component c, Graphics g, int x, int y) {
      g.setColor(color);
      Polygon p = new Polygon();
      if (state == State.NORMAL) {
        p.addPoint(x + (getIconWidth() / 2), y);
        p.addPoint(x, y + getIconHeight() - 1);
        p.addPoint(x + getIconWidth() - 1, y + getIconHeight() - 1);
      } else if (state == State.PRESSED) {
        p.addPoint(x, y);
        p.addPoint(x + getIconWidth() - 1, y);
        p.addPoint(x + (getIconWidth() / 2), y + getIconHeight() - 1);
      } else {
        p.addPoint(x, y);
        p.addPoint(x, y + getIconHeight() - 1);
        p.addPoint(x + getIconWidth() - 1, y + (getIconHeight() / 2));
      }
      g.fillPolygon(p);
    }
  }
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    Container contentPane = frame.getContentPane();
    Icon normalIcon = new TriangleIcon(Color.red, TriangleIcon.State.NORMAL);
    Icon pressedIcon = new TriangleIcon(Color.red,
        TriangleIcon.State.PRESSED);
    Icon rolloverIcon = new TriangleIcon(Color.red,
        TriangleIcon.State.ROLLOVER);
    JButton b = new JButton("Button", normalIcon);
    b.setPressedIcon(pressedIcon);
    b.setRolloverIcon(rolloverIcon);
    b.setRolloverEnabled(true);
    contentPane.add(b, BorderLayout.NORTH);
    frame.setSize(300, 100);
    frame.show();
  }
}





Display Message

  
/*
 * This example is from the book "Java Foundation Classes in a Nutshell".
 * Written by David Flanagan. Copyright (c) 1999 by O"Reilly & Associates.  
 * You may distribute this source code for non-commercial purposes only.
 * You may study, modify, and use this example for any purpose, as long as
 * this notice is retained.  Note that this example is provided "as is",
 * WITHOUT WARRANTY of any kind either expressed or implied.
 */
import java.awt.*;             // AWT classes
import javax.swing.*;          // Swing components and classes
import javax.swing.border.*;   // Borders for Swing components
import java.awt.event.*;       // Basic event handling 
public class DisplayMessage {
  public static void main(String[] args) {
    /*
     * Step 1: Create the components
     */
    JLabel msgLabel = new JLabel();      // Component to display the question
    JButton yesButton = new JButton();   // Button for an affirmative response
    JButton noButton = new JButton();    // Button for a negative response
    /*
     * Step 2: Set properties of the components
     */
    msgLabel.setText(args[0]);                           // The msg to display
    msgLabel.setBorder(new EmptyBorder(10,10,10,10));    // A 10-pixel margin 
    yesButton.setText((args.length >= 2)?args[1]:"Yes"); // Text for Yes button
    noButton.setText((args.length >= 3)?args[2]:"No");   // Text for no button
    /*
     * Step 3: Create containers to hold the components
     */
    JFrame win = new JFrame("Message");  // The main application window
    JPanel buttonbox = new JPanel();     // A container for the two buttons
    
    /*
     * Step 4: Specify LayoutManagers to arrange components in the containers
     */
    win.getContentPane().setLayout(new BorderLayout()); // layout on borders
    buttonbox.setLayout(new FlowLayout());              // layout left-to-right
    /*
     * Step 5: Add components to containers, with optional layout constraints
     */
    buttonbox.add(yesButton);            // add yes button to the panel
    buttonbox.add(noButton);             // add no button to the panel
    
    // add JLabel to window, telling the BorderLayout to put it in the middle
    win.getContentPane().add(msgLabel, "Center");        
    // add panel to window, telling the BorderLayout to put it at the bottom
    win.getContentPane().add(buttonbox, "South");  
    
    /*
     * Step 6: Arrange to handle events in the user interface.
     */
    yesButton.addActionListener(new ActionListener() {  // Note: inner class
      // This method is called when the Yes button is clicked.
      public void actionPerformed(ActionEvent e) { System.exit(0); }
    });
    noButton.addActionListener(new ActionListener() {   // Note: inner class
      // This method is called when the No button is clicked.
      public void actionPerformed(ActionEvent e) { System.exit(1); }
    });
    /*
     * Step 7: Display the GUI to the user
     */
    win.pack();   // Set the size of the window based its children"s sizes.
    win.show();   // Make the window visible.
  }
}





Dynamically update the appearance of a component

 
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
public class Main extends JFrame {
  final JButton b = new JButton("Add");
  int size = 10;
  public Main() {
    setSize(300, 150);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setLayout(new FlowLayout());
    add(b);
    b.addActionListener(new ActionListener() {
      
      public void actionPerformed(ActionEvent ev) {
        b.setFont(new Font("Dialog", Font.PLAIN, ++size));
        b.revalidate();
      }
    });
    setVisible(true);
  }
  public static void main(String[] args) {
    new Main();    
  }
}





HTML button

  
import java.awt.FlowLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.JButton;
import javax.swing.JFrame;
public class HtmlButtons extends JFrame {
  public HtmlButtons() {
    super("HTML Buttons");
    setSize(400, 300);
    getContentPane().setLayout(new FlowLayout());
    String htmlText = "<html><p><font color=\"#800080\" "
        + "size=\"4\" face=\"Verdana\">JButton</font> </p>"
        + "<font size=\"2\"><em>" + "with HTML text</em></font></html>";
    JButton btn = new JButton(htmlText);
    getContentPane().add(btn);
    WindowListener wndCloser = new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    };
    addWindowListener(wndCloser);
    setVisible(true);
  }
  public static void main(String args[]) {
    new HtmlButtons();
  }
}





If the action does not have an icon or a different icon must be used, add or change the icon using setIcon():

 
import javax.swing.ImageIcon;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    // Add or change the icon; it will appear to the left of the text
    button.setIcon(new ImageIcon("icon.gif"));
    // Set to null to remove icon
    button.setIcon(null);
  }
}





JToggleButton Demo

  
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.AbstractButton;
import javax.swing.ButtonModel;
import javax.swing.JFrame;
import javax.swing.JToggleButton;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class SelectingToggle {
  public static void main(String args[]) {
    String title = (args.length == 0 ? "Selecting Toggle" : args[0]);
    JFrame frame = new JFrame(title);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JToggleButton toggleButton = new JToggleButton("Selected");
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        AbstractButton abstractButton = (AbstractButton) actionEvent.getSource();
        boolean selected = abstractButton.getModel().isSelected();
        System.out.println("Action - selected=" + selected + "\n");
      }
    };
    ChangeListener changeListener = new ChangeListener() {
      public void stateChanged(ChangeEvent changeEvent) {
        AbstractButton abstractButton = (AbstractButton) changeEvent
            .getSource();
        ButtonModel buttonModel = abstractButton.getModel();
        boolean armed = buttonModel.isArmed();
        boolean pressed = buttonModel.isPressed();
        boolean selected = buttonModel.isSelected();
        System.out.println("Changed: " + armed + "/" + pressed + "/"
            + selected);
      }
    };
    ItemListener itemListener = new ItemListener() {
      public void itemStateChanged(ItemEvent itemEvent) {
        int state = itemEvent.getStateChange();
        if (state == ItemEvent.SELECTED) {
          System.out.println("Selected");
        } else {
          System.out.println("Deselected");
        }
      }
    };
    // Attach Listeners
    toggleButton.addActionListener(actionListener);
    toggleButton.addChangeListener(changeListener);
    toggleButton.addItemListener(itemListener);
    Container contentPane = frame.getContentPane();
    contentPane.add(toggleButton, BorderLayout.NORTH);
    JToggleButton toggleButton2 = new JToggleButton("Focused");
    contentPane.add(toggleButton2, BorderLayout.CENTER);
    JToggleButton toggleButton3 = new JToggleButton("Not Selected");
    contentPane.add(toggleButton3, BorderLayout.SOUTH);
    frame.setSize(300, 125);
    frame.setVisible(true);
  }
}





Label text italicizes the second line

 
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    button.setText("<html>" + "This is a" + "<br><i>" + "swing button"
        + "</i></html>");
  }
}





Lines are left justified. This label text will center the lines

 
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    button.setText("<html><center>" + "This is a" + "<br>" + "swing button"
        + "</center></html>");
  }
}





LoadSave: Button action

  
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.io.FileReader;
import java.io.FileWriter;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.text.JTextComponent;
public class LoadSave {
  public static void main(String args[]) {
    final String filename = "text.out";
    JFrame frame = new JFrame("Loading/Saving Example");
    Container content = frame.getContentPane();
    final JTextField textField = new JTextField();
    content.add(textField, BorderLayout.NORTH);
    JPanel panel = new JPanel();
    Action loadAction = new AbstractAction() {
      public void actionPerformed(ActionEvent e) {
        try {
          doLoadCommand(textField, filename);
        } catch (Exception e1) {
          // TODO Auto-generated catch block
          e1.printStackTrace();
        }
      }
    };
    loadAction.putValue(Action.NAME, "Load");
    JButton loadButton = new JButton(loadAction);
    panel.add(loadButton);
    Action saveAction = new AbstractAction() {
      public void actionPerformed(ActionEvent e) {
        try {
          doSaveCommand(textField, filename);
        } catch (Exception e1) {
          // TODO Auto-generated catch block
          e1.printStackTrace();
        }
      }
    };
    saveAction.putValue(Action.NAME, "Save");
    JButton saveButton = new JButton(saveAction);
    panel.add(saveButton);
    Action clearAction = new AbstractAction() {
      {
        putValue(Action.NAME, "Clear");
      }
      public void actionPerformed(ActionEvent e) {
        textField.setText("");
      }
    };
    JButton clearButton = new JButton(clearAction);
    panel.add(clearButton);
    content.add(panel, BorderLayout.SOUTH);
    frame.setSize(250, 150);
    frame.setVisible(true);
  }
  public static void doSaveCommand(JTextComponent textComponent, String filename) throws Exception {
    FileWriter writer = null;
    writer = new FileWriter(filename);
    textComponent.write(writer);
    writer.close();
  }
  public static void doLoadCommand(JTextComponent textComponent, String filename) throws Exception {
    FileReader reader = null;
    reader = new FileReader(filename);
    textComponent.read(reader, filename);
    reader.close();
  }
}





Mnemonic Sample

  
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
public class MnemonicSample {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Mnemonics");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = frame.getContentPane();
    content.setLayout(new GridLayout(1, 0));
    JButton button1 = new JButton("Warning");
    button1.setMnemonic(KeyEvent.VK_W);
    content.add(button1);
    JButton button2 = new JButton("Warning");
    button2.setMnemonic(KeyEvent.VK_H);
    content.add(button2);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Moving the Icon in a JButton Component

 
  
import javax.swing.JButton;
import javax.swing.SwingConstants;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    // Place text over center of icon; they both occupy the same space
    button.setVerticalTextPosition(SwingConstants.CENTER);
    button.setHorizontalTextPosition(SwingConstants.CENTER);
    // Place text above icon
    button.setVerticalTextPosition(SwingConstants.TOP);
    button.setHorizontalTextPosition(SwingConstants.CENTER);
    // Place text below icon
    button.setVerticalTextPosition(SwingConstants.BOTTOM);
    button.setHorizontalTextPosition(SwingConstants.CENTER);
    // Place text to the left of icon, vertically centered
    button.setVerticalTextPosition(SwingConstants.CENTER);
    button.setHorizontalTextPosition(SwingConstants.LEFT);
    // Place text to the left of icon and align their tops
    button.setVerticalTextPosition(SwingConstants.TOP);
    button.setHorizontalTextPosition(SwingConstants.LEFT);
    // Place text to the left of icon and align their bottoms
    button.setVerticalTextPosition(SwingConstants.BOTTOM);
    button.setHorizontalTextPosition(SwingConstants.LEFT);
    // Place text to the right of icon, vertically centered
    button.setVerticalTextPosition(SwingConstants.CENTER);
    button.setHorizontalTextPosition(SwingConstants.RIGHT);
    // Place text to the right of icon and align their tops
    button.setVerticalTextPosition(SwingConstants.TOP);
    button.setHorizontalTextPosition(SwingConstants.RIGHT);
    // Place text to the right of icon and align their bottoms
    button.setVerticalTextPosition(SwingConstants.BOTTOM);
    button.setHorizontalTextPosition(SwingConstants.RIGHT);
  }
}





Moving the Label/Icon Pair in a JButton Component

 
import javax.swing.JButton;
import javax.swing.SwingConstants;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    // Place the contents in the northwest corner
    button.setVerticalAlignment(SwingConstants.TOP);
    button.setHorizontalAlignment(SwingConstants.LEFT);
    // Place the contents centered at the top
    button.setVerticalAlignment(SwingConstants.TOP);
    button.setHorizontalAlignment(SwingConstants.CENTER);
    // Place the contents in the northeast corner
    button.setVerticalAlignment(SwingConstants.BOTTOM);
    button.setHorizontalAlignment(SwingConstants.RIGHT);
    // Place the contents in the southwest corner
    button.setVerticalAlignment(SwingConstants.BOTTOM);
    button.setHorizontalAlignment(SwingConstants.LEFT);
    // Place the contents centered at the bottom
    button.setVerticalAlignment(SwingConstants.BOTTOM);
    button.setHorizontalAlignment(SwingConstants.CENTER);
    // Place the contents in the southeast corner
    button.setVerticalAlignment(SwingConstants.BOTTOM);
    button.setHorizontalAlignment(SwingConstants.RIGHT);
    // Place the contents vertically centered on the left
    button.setVerticalAlignment(SwingConstants.CENTER);
    button.setHorizontalAlignment(SwingConstants.LEFT);
    // Place the contents directly in the center
    button.setVerticalAlignment(SwingConstants.CENTER);
    button.setHorizontalAlignment(SwingConstants.CENTER);
    // Place the contents vertically centered on the right
    button.setVerticalAlignment(SwingConstants.CENTER);
    button.setHorizontalAlignment(SwingConstants.RIGHT);
  }
}





Putting buttons on an applet

  
// : c14:Button1.java
// Putting buttons on an applet.
// <applet code=Button1 width=200 height=50></applet>
// From "Thinking in Java, 3rd ed." (c) Bruce Eckel 2002
// www.BruceEckel.ru. See copyright notice in CopyRight.txt.
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
public class Button1 extends JApplet {
  private JButton b1 = new JButton("Button 1"), b2 = new JButton("Button 2");
  public void init() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.add(b1);
    cp.add(b2);
  }
  public static void main(String[] args) {
    run(new Button1(), 200, 50);
  }
  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(applet);
    frame.setSize(width, height);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
} ///:~





Responding to button presses

  
// : c14:Button2.java
// Responding to button presses.
// <applet code=Button2 width=200 height=75></applet>
// From "Thinking in Java, 3rd ed." (c) Bruce Eckel 2002
// www.BruceEckel.ru. See copyright notice in CopyRight.txt.
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class Button2 extends JApplet {
  private JButton b1 = new JButton("Button 1"), b2 = new JButton("Button 2");
  private JTextField txt = new JTextField(10);
  class ButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      String name = ((JButton) e.getSource()).getText();
      txt.setText(name);
    }
  }
  private ButtonListener bl = new ButtonListener();
  public void init() {
    b1.addActionListener(bl);
    b2.addActionListener(bl);
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.add(b1);
    cp.add(b2);
    cp.add(txt);
  }
  public static void main(String[] args) {
    run(new Button2(), 200, 75);
  }
  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(applet);
    frame.setSize(width, height);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
} ///:~





Setting the Gap Size Between the Label and Icon in a JButton Component

 
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton();
    // Get gap size; default is 4
    int gapSize = button.getIconTextGap();
    // Set gap size
    button.setIconTextGap(8);
  }
}





Sharing an Action between JButton Components

  
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JToolBar;
public class ActionTester {
  static class MyAction extends AbstractAction {
    public MyAction(String name, Icon icon) {
      super(name, icon);
    }
    public void actionPerformed(ActionEvent e) {
      System.out.println("Selected: " + getValue(Action.NAME));
    }
  }
  public static void main(String args[]) {
    JFrame f = new JFrame();
    Container pane = f.getContentPane();
    Icon icon = new RedOvalIcon();
    final Action action = new MyAction("Hello", icon);
    // Add tooltip
    action.putValue(Action.SHORT_DESCRIPTION, "World");
    JToolBar jt1 = new JToolBar();
    JButton b1 = new JButton(action);
    jt1.add(b1);
    pane.add(jt1, BorderLayout.NORTH);
    JToolBar jt2 = new JToolBar();
    JButton b2 = new JButton(action);
    jt2.add(b2);
    pane.add(jt2, BorderLayout.SOUTH);
    JButton jb = new JButton("Toggle Action");
    jb.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        action.setEnabled(!action.isEnabled());
      }
    });
    pane.add(jb, BorderLayout.CENTER);
    f.setSize(200, 200);
    f.show();
  }
  static class RedOvalIcon implements Icon {
    public void paintIcon(Component c, Graphics g, int x, int y) {
      g.setColor(Color.RED);
      if (c.isEnabled()) {
        g.fillOval(x, y, getIconWidth(), getIconHeight());
      } else {
        g.drawOval(x, y, getIconWidth(), getIconHeight());
      }
    }
    public int getIconWidth() {
      return 20;
    }
    public int getIconHeight() {
      return 30;
    }
  }
}





Sharing Models between Buttons

  
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonModel;
import javax.swing.JButton;
import javax.swing.JFrame;
public class ButtonModelTesting {
  static class MessageActionListener implements ActionListener {
    String message;
    public MessageActionListener(String msg) {
      message = msg;
    }
    public void actionPerformed(ActionEvent e) {
      System.out.println(message);
    }
  }
  public static void main(String args[]) {
    JFrame f = new JFrame("Button Model Tester");
    JButton jb1 = new JButton("Hello");
    ButtonModel bm = jb1.getModel();
    JButton jb2 = new JButton("World");
    jb2.setModel(bm);
    Container c = f.getContentPane();
    c.add(jb1, BorderLayout.NORTH);
    c.add(jb2, BorderLayout.SOUTH);
    jb1.addActionListener(new MessageActionListener("Selected One"));
    jb2.addActionListener(new MessageActionListener("Selected Two"));
    f.pack();
    f.show();
  }
}





Simple Button UI

  
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.plaf.ruponentUI;
import javax.swing.plaf.basic.BasicButtonUI;
public class MyButtonUI extends BasicButtonUI implements java.io.Serializable,
    MouseListener, KeyListener {
  private final static MyButtonUI m_buttonUI = new MyButtonUI();
  protected Border m_borderRaised = UIManager.getBorder("Button.border");
  protected Border m_borderLowered = UIManager
      .getBorder("Button.borderPressed");
  protected Color m_backgroundNormal = UIManager
      .getColor("Button.background");
  protected Color m_backgroundPressed = UIManager
      .getColor("Button.pressedBackground");
  protected Color m_foregroundNormal = UIManager
      .getColor("Button.foreground");
  protected Color m_foregroundActive = UIManager
      .getColor("Button.activeForeground");
  protected Color m_focusBorder = UIManager.getColor("Button.focusBorder");
  public static ComponentUI createUI(JComponent c) {
    return m_buttonUI;
  }
  public void installUI(JComponent c) {
    super.installUI(c);
    c.addMouseListener(this);
    c.addKeyListener(this);
  }
  public void uninstallUI(JComponent c) {
    super.uninstallUI(c);
    c.removeMouseListener(this);
    c.removeKeyListener(this);
  }
  public void paint(Graphics g, JComponent c) {
    AbstractButton b = (AbstractButton) c;
    Dimension d = b.getSize();
    g.setFont(c.getFont());
    FontMetrics fm = g.getFontMetrics();
    g.setColor(b.getForeground());
    String caption = b.getText();
    int x = (d.width - fm.stringWidth(caption)) / 2;
    int y = (d.height + fm.getAscent()) / 2;
    g.drawString(caption, x, y);
  }
  public Dimension getPreferredSize(JComponent c) {
    Dimension d = super.getPreferredSize(c);
    if (m_borderRaised != null) {
      Insets ins = m_borderRaised.getBorderInsets(c);
      d.setSize(d.width + ins.left + ins.right, d.height + ins.top
          + ins.bottom);
    }
    return d;
  }
  public void mouseClicked(MouseEvent e) {
  }
  public void mousePressed(MouseEvent e) {
    JComponent c = (JComponent) e.getComponent();
    c.setBorder(m_borderLowered);
    c.setBackground(m_backgroundPressed);
  }
  public void mouseReleased(MouseEvent e) {
    JComponent c = (JComponent) e.getComponent();
    c.setBorder(m_borderRaised);
    c.setBackground(m_backgroundNormal);
  }
  public void mouseEntered(MouseEvent e) {
    JComponent c = (JComponent) e.getComponent();
    c.setForeground(m_foregroundActive);
    c.repaint();
  }
  public void mouseExited(MouseEvent e) {
    JComponent c = (JComponent) e.getComponent();
    c.setForeground(m_foregroundNormal);
    c.repaint();
  }
  public void keyTyped(KeyEvent e) {
  }
  public void keyPressed(KeyEvent e) {
    int code = e.getKeyCode();
    if (code == KeyEvent.VK_ENTER || code == KeyEvent.VK_SPACE) {
      JComponent c = (JComponent) e.getComponent();
      c.setBorder(m_borderLowered);
      c.setBackground(m_backgroundPressed);
    }
  }
  public void keyReleased(KeyEvent e) {
    int code = e.getKeyCode();
    if (code == KeyEvent.VK_ENTER || code == KeyEvent.VK_SPACE) {
      JComponent c = (JComponent) e.getComponent();
      c.setBorder(m_borderRaised);
      c.setBackground(m_backgroundNormal);
    }
  }
  public static void main(String argv[]) {
    JFrame f = new JFrame();
    f.setSize(400, 300);
    f.getContentPane().setLayout(new FlowLayout());
    JPanel p = new JPanel();
    JButton bt1 = new JButton("Click Me");
    bt1.setUI(new MyButtonUI());
    p.add(bt1);
    f.getContentPane().add(p);
    WindowListener wndCloser = new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    };
    f.addWindowListener(wndCloser);
    f.setVisible(true);
  }
}





Simple ToggleButton Sample

  
import java.awt.BorderLayout;
import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JToggleButton;
public class ToggleButtonSample {
  public static void main(String args[]) {
    JFrame f = new JFrame("JToggleButton Sample");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = f.getContentPane();
    content.add(new JToggleButton("North"), BorderLayout.NORTH);
    content.add(new JToggleButton("East"), BorderLayout.EAST);
    content.add(new JToggleButton("West"), BorderLayout.WEST);
    content.add(new JToggleButton("Center"), BorderLayout.CENTER);
    content.add(new JToggleButton("South"), BorderLayout.SOUTH);
    f.setSize(300, 200);
    f.setVisible(true);
  }
}





Swing Button Demo

  
/* From http://java.sun.ru/docs/books/tutorial/index.html */
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractButton;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
/*
 * SwingButtonDemo.java is a 1.4 application that requires the following files:
 * images/right.gif images/middle.gif images/left.gif
 */
public class SwingButtonDemo extends JPanel implements ActionListener {
  protected JButton b1, b2, b3;
  public SwingButtonDemo() {
    ImageIcon leftButtonIcon = createImageIcon("images/right.gif");
    ImageIcon middleButtonIcon = createImageIcon("images/middle.gif");
    ImageIcon rightButtonIcon = createImageIcon("images/left.gif");
    b1 = new JButton("Disable middle button", leftButtonIcon);
    b1.setVerticalTextPosition(AbstractButton.CENTER);
    b1.setHorizontalTextPosition(AbstractButton.LEADING); //aka LEFT, for
    // left-to-right
    // locales
    b1.setMnemonic(KeyEvent.VK_D);
    b1.setActionCommand("disable");
    b2 = new JButton("Middle button", middleButtonIcon);
    b2.setVerticalTextPosition(AbstractButton.BOTTOM);
    b2.setHorizontalTextPosition(AbstractButton.CENTER);
    b2.setMnemonic(KeyEvent.VK_M);
    b3 = new JButton("Enable middle button", rightButtonIcon);
    //Use the default text position of CENTER, TRAILING (RIGHT).
    b3.setMnemonic(KeyEvent.VK_E);
    b3.setActionCommand("enable");
    b3.setEnabled(false);
    //Listen for actions on buttons 1 and 3.
    b1.addActionListener(this);
    b3.addActionListener(this);
    b1.setToolTipText("Click this button to disable the middle button.");
    b2.setToolTipText("This middle button does nothing when you click it.");
    b3.setToolTipText("Click this button to enable the middle button.");
    //Add Components to this container, using the default FlowLayout.
    add(b1);
    add(b2);
    add(b3);
  }
  public void actionPerformed(ActionEvent e) {
    if ("disable".equals(e.getActionCommand())) {
      b2.setEnabled(false);
      b1.setEnabled(false);
      b3.setEnabled(true);
    } else {
      b2.setEnabled(true);
      b1.setEnabled(true);
      b3.setEnabled(false);
    }
  }
  /** Returns an ImageIcon, or null if the path was invalid. */
  protected static ImageIcon createImageIcon(String path) {
    java.net.URL imgURL = SwingButtonDemo.class.getResource(path);
    if (imgURL != null) {
      return new ImageIcon(imgURL);
    } else {
      System.err.println("Couldn"t find file: " + path);
      return null;
    }
  }
  /**
   * Create the GUI and show it. For thread safety, this method should be
   * invoked from the event-dispatching thread.
   */
  private static void createAndShowGUI() {
    //Make sure we have nice window decorations.
    JFrame.setDefaultLookAndFeelDecorated(true);
    //Create and set up the window.
    JFrame frame = new JFrame("SwingButtonDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    //Create and set up the content pane.
    SwingButtonDemo newContentPane = new SwingButtonDemo();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);
    //Display the window.
    frame.pack();
    frame.setVisible(true);
  }
  public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application"s GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        createAndShowGUI();
      }
    });
  }
}





Swing Default Button

  
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;
public class SwingDefaultButton {
  public static void main(String args[]) {
    JFrame frame = new JFrame("SwingDefaultButton");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = frame.getContentPane();
    content.setLayout(new GridLayout(2, 2));
    JButton button1 = new JButton("Text Button");
    button1.setMnemonic(KeyEvent.VK_B);
    content.add(button1);
    Icon warnIcon = new ImageIcon("Warn.gif");
    JButton button2 = new JButton(warnIcon);
    content.add(button2);
    JButton button3 = new JButton("Warning", warnIcon);
    content.add(button3);
    String htmlButton = "<html><sup>HTML</sup> <sub><em>Button</em></sub><br>"
        + "<font color=\"#FF0080\"><u>Multi-line</u></font>";
    JButton button4 = new JButton(htmlButton);
    content.add(button4);
    JRootPane rootPane = frame.getRootPane();
    rootPane.setDefaultButton(button2);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





The event demonstration program for JToggleButton

  
//The event demonstration program for JToggleButton.
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JFrame;
import javax.swing.JToggleButton;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class JToggleButtonEvents {
  public static void main(String[] args) {
    JToggleButton jtb = new JToggleButton("Press Me");
    jtb.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ev) {
        System.out.println("ActionEvent!");
      }
    });
    jtb.addItemListener(new ItemListener() {
      public void itemStateChanged(ItemEvent ev) {
        System.out.println("ItemEvent!");
      }
    });
    jtb.addChangeListener(new ChangeListener() {
      public void stateChanged(ChangeEvent ev) {
        System.out.println("ChangeEvent!");
      }
    });
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container c = f.getContentPane();
    c.setLayout(new FlowLayout());
    c.add(jtb);
    f.pack();
    f.setVisible(true);
  }
}





The Swing-ified button example

  
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JPanel;
public class ToolbarFrame2 extends Frame {
  JButton cutButton, copyButton, pasteButton;
  JButton javaButton, macButton, motifButton, winButton;
  public ToolbarFrame2() {
    setSize(450, 250);
    
    ActionListener printListener = new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        System.out.println(ae.getActionCommand());
      }
    };
    // JPanel works similarly to Panel, so we"ll use it
    JPanel toolbar = new JPanel();
    toolbar.setLayout(new FlowLayout(FlowLayout.LEFT));
    cutButton = new JButton("Cut");
    cutButton.addActionListener(printListener);
    toolbar.add(cutButton);
    copyButton = new JButton("Copy");
    copyButton.addActionListener(printListener);
    toolbar.add(copyButton);
    pasteButton = new JButton("Paste");
    pasteButton.addActionListener(printListener);
    toolbar.add(pasteButton);
    add(toolbar, BorderLayout.NORTH); // The new BorderLayout add
    JPanel lnfPanel = new JPanel();
    macButton = new JButton("Mac");
    macButton.addActionListener(printListener);
    lnfPanel.add(macButton);
    javaButton = new JButton("Metal");
    javaButton.addActionListener(printListener);
    lnfPanel.add(javaButton);
    motifButton = new JButton("Motif");
    motifButton.addActionListener(printListener);
    lnfPanel.add(motifButton);
    winButton = new JButton("Windows");
    winButton.addActionListener(printListener);
    lnfPanel.add(winButton);
    add(lnfPanel, BorderLayout.SOUTH);
  }
  public static void main(String args[]) {
    ToolbarFrame2 tf2 = new ToolbarFrame2();
    tf2.setVisible(true);
  }
}





Uses reflection to create groups of different types of AbstractButton

  
// : c14:ButtonGroups.java
// Uses reflection to create groups
// of different types of AbstractButton.
// <applet code=ButtonGroups width=500 height=300></applet>
// From "Thinking in Java, 3rd ed." (c) Bruce Eckel 2002
// www.BruceEckel.ru. See copyright notice in CopyRight.txt.
import java.awt.Container;
import java.awt.FlowLayout;
import java.lang.reflect.Constructor;
import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JToggleButton;
import javax.swing.border.TitledBorder;
public class ButtonGroups extends JApplet {
  private static String[] ids = { "June", "Ward", "Beaver", "Wally", "Eddie",
      "Lumpy", };
  static JPanel makeBPanel(Class klass, String[] ids) {
    ButtonGroup bg = new ButtonGroup();
    JPanel jp = new JPanel();
    String title = klass.getName();
    title = title.substring(title.lastIndexOf(".") + 1);
    jp.setBorder(new TitledBorder(title));
    for (int i = 0; i < ids.length; i++) {
      AbstractButton ab = new JButton("failed");
      try {
        // Get the dynamic constructor method
        // that takes a String argument:
        Constructor ctor = klass
            .getConstructor(new Class[] { String.class });
        // Create a new object:
        ab = (AbstractButton) ctor.newInstance(new Object[] { ids[i] });
      } catch (Exception ex) {
        System.err.println("can"t create " + klass);
      }
      bg.add(ab);
      jp.add(ab);
    }
    return jp;
  }
  public void init() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.add(makeBPanel(JButton.class, ids));
    cp.add(makeBPanel(JToggleButton.class, ids));
    cp.add(makeBPanel(JCheckBox.class, ids));
    cp.add(makeBPanel(JRadioButton.class, ids));
  }
  public static void main(String[] args) {
    run(new ButtonGroups(), 500, 300);
  }
  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(applet);
    frame.setSize(width, height);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
} ///:~





Various Swing buttons

  
// : c14:Buttons.java
// Various Swing buttons.
// <applet code=Buttons width=350 height=100></applet>
// From "Thinking in Java, 3rd ed." (c) Bruce Eckel 2002
// www.BruceEckel.ru. See copyright notice in CopyRight.txt.
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JToggleButton;
import javax.swing.border.TitledBorder;
import javax.swing.plaf.basic.BasicArrowButton;
public class Buttons extends JApplet {
  private JButton jb = new JButton("JButton");
  private BasicArrowButton up = new BasicArrowButton(BasicArrowButton.NORTH),
      down = new BasicArrowButton(BasicArrowButton.SOUTH),
      right = new BasicArrowButton(BasicArrowButton.EAST),
      left = new BasicArrowButton(BasicArrowButton.WEST);
  public void init() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.add(jb);
    cp.add(new JToggleButton("JToggleButton"));
    cp.add(new JCheckBox("JCheckBox"));
    cp.add(new JRadioButton("JRadioButton"));
    JPanel jp = new JPanel();
    jp.setBorder(new TitledBorder("Directions"));
    jp.add(up);
    jp.add(down);
    jp.add(left);
    jp.add(right);
    cp.add(jp);
  }
  public static void main(String[] args) {
    run(new Buttons(), 350, 100);
  }
  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(applet);
    frame.setSize(width, height);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
} ///:~


Источник — «http://jexp.ru/index.php?title=Java/Swing_JFC/Button&oldid=7400»