Java by API/javax.swing/Action

Action.MNEMONIC_KEY

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JToolBar;
import javax.swing.plaf.metal.MetalIconFactory;
public class MainClass {
  public static void main(String[] a) {
    final int STRING_POSITION = 1;
    Object buttonColors[][] = { { Color.RED, "RED" }, { Color.BLUE, "BLUE" },
        { Color.GREEN, "GREEN" }, { Color.BLACK, "BLACK" }, null, // separator
        { Color.CYAN, "CYAN" } };
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new TheActionListener();
    JToolBar toolbar = new JToolBar();
    toolbar.setRollover(true);
    for (Object[] color : buttonColors) {
      if (color == null) {
        toolbar.addSeparator();
      } else {
        Icon icon = MetalIconFactory.getTreeComputerIcon();
        JButton button = new JButton(icon);
        button.setActionCommand((String) color[STRING_POSITION]);
        button.addActionListener(actionListener);
        toolbar.add(button);
      }
    }
    Action action = new ShowAction(toolbar);
    JButton button = new JButton(action);
    toolbar.add(button);
    Container contentPane = frame.getContentPane();
    contentPane.add(toolbar, BorderLayout.NORTH);
    JTextArea textArea = new JTextArea();
    JScrollPane pane = new JScrollPane(textArea);
    contentPane.add(pane, BorderLayout.CENTER);
    frame.setSize(350, 150);
    frame.setVisible(true);
  }
  public static class TheActionListener implements ActionListener {
    public void actionPerformed(ActionEvent actionEvent) {
      System.out.println(actionEvent.getActionCommand());
    }
  };
}
class ShowAction extends AbstractAction {
  Component parentComponent;
  public ShowAction(Component parentComponent) {
    super("About");
    putValue(Action.MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
    putValue(Action.SMALL_ICON, MetalIconFactory.getFileChooserHomeFolderIcon());
    this.parentComponent = parentComponent;
  }
  public void actionPerformed(ActionEvent actionEvent) {
        JOptionPane.showMessageDialog(parentComponent, "About Swing",
            "About Box V2.0", JOptionPane.INFORMATION_MESSAGE);
  }
}

Action.NAME

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
public class MainClass extends JFrame {
  public static final int MIN_NUMBER = 2;
  public static final int MAX_NUMBER = 13;
  private int currentNumber = MIN_NUMBER;
  private int favoriteNumber = 9;
  private JLabel numberLabel = new JLabel();
  private Action upAction = new UpAction();
  private Action downAction = new DownAction();
  private GotoFavoriteAction gotoFavoriteAction = new GotoFavoriteAction();
  private Action setFavoriteAction = new SetFavoriteAction();
  public class UpAction extends AbstractAction {
    public UpAction() {
      putValue(NAME, "Number Add");
      putValue(SMALL_ICON, new ImageIcon("images/up.gif"));
      putValue(SHORT_DESCRIPTION, "Increment the number");
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
    }
    public void actionPerformed(ActionEvent ae) {
      setChannel(currentNumber + 1);
    }
  }
  public class DownAction extends AbstractAction {
    public DownAction() {
      putValue(NAME, "Number Down");
      putValue(SMALL_ICON, new ImageIcon("images/down.gif"));
      putValue(SHORT_DESCRIPTION, "Decrement the number");
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_D));
    }
    public void actionPerformed(ActionEvent ae) {
      setChannel(currentNumber - 1);
    }
  }
  public class GotoFavoriteAction extends AbstractAction {
    public GotoFavoriteAction() {
      putValue(SMALL_ICON, new ImageIcon("images/fav.gif"));
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_G));
      updateProperties();
    }
    public void updateProperties() {
      putValue(NAME, "Go to number " + favoriteNumber);
      putValue(SHORT_DESCRIPTION, "Change the number to " + favoriteNumber);
    }
    public void actionPerformed(ActionEvent ae) {
      setChannel(favoriteNumber);
    }
  }
  public class SetFavoriteAction extends AbstractAction {
    public SetFavoriteAction() {
      putValue(NAME, "Set "Go to" number");
      putValue(SMALL_ICON, new ImageIcon("images/set.gif"));
      putValue(SHORT_DESCRIPTION, "Make current number the Favorite number");
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_S));
    }
    public void actionPerformed(ActionEvent ae) {
      favoriteNumber = currentNumber;
      gotoFavoriteAction.updateProperties();
      setEnabled(false);
      gotoFavoriteAction.setEnabled(false);
    }
  }
  public MainClass() {
    super();
    setChannel(currentNumber);
    numberLabel.setHorizontalAlignment(JLabel.CENTER);
    numberLabel.setFont(new Font("Serif", Font.PLAIN, 32));
    getContentPane().add(numberLabel, BorderLayout.NORTH);
    JPanel buttonPanel = new JPanel(new GridLayout(2, 2, 16, 6));
    buttonPanel.setBorder(BorderFactory.createEmptyBorder(6, 16, 16, 16));
    getContentPane().add(buttonPanel, BorderLayout.CENTER);
    buttonPanel.add(new JButton(upAction));
    buttonPanel.add(new JButton(gotoFavoriteAction));
    buttonPanel.add(new JButton(downAction));
    buttonPanel.add(new JButton(setFavoriteAction));
    JMenuBar mb = new JMenuBar();
    JMenu menu = new JMenu("Number");
    menu.add(new JMenuItem(upAction));
    menu.add(new JMenuItem(downAction));
    menu.addSeparator();
    menu.add(new JMenuItem(gotoFavoriteAction));
    menu.add(new JMenuItem(setFavoriteAction));
    mb.add(menu);
    setJMenuBar(mb);
  }
  public void setChannel(int chan) {
    currentNumber = chan;
    numberLabel.setText("Now tuned to number: " + currentNumber);
    downAction.setEnabled(currentNumber > MIN_NUMBER);
    upAction.setEnabled(currentNumber < MAX_NUMBER);
    gotoFavoriteAction.setEnabled(currentNumber != favoriteNumber);
    setFavoriteAction.setEnabled(currentNumber != favoriteNumber);
  }
  public static void main(String argv[]) {
    JFrame f = new MainClass();
    f.setSize(400, 180);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
  }
}

Action: setEnabled(boolean b)

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
public class MainClass extends JFrame {
  public static final int MIN_NUMBER = 2;
  public static final int MAX_NUMBER = 13;
  private int currentNumber = MIN_NUMBER;
  private int favoriteNumber = 9;
  private JLabel numberLabel = new JLabel();
  private Action upAction = new UpAction();
  private Action downAction = new DownAction();
  private GotoFavoriteAction gotoFavoriteAction = new GotoFavoriteAction();
  private Action setFavoriteAction = new SetFavoriteAction();
  public class UpAction extends AbstractAction {
    public UpAction() {
      putValue(NAME, "Number Add");
      putValue(SMALL_ICON, new ImageIcon("images/up.gif"));
      putValue(SHORT_DESCRIPTION, "Increment the number");
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
    }
    public void actionPerformed(ActionEvent ae) {
      setChannel(currentNumber + 1);
    }
  }
  public class DownAction extends AbstractAction {
    public DownAction() {
      putValue(NAME, "Number Down");
      putValue(SMALL_ICON, new ImageIcon("images/down.gif"));
      putValue(SHORT_DESCRIPTION, "Decrement the number");
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_D));
    }
    public void actionPerformed(ActionEvent ae) {
      setChannel(currentNumber - 1);
    }
  }
  public class GotoFavoriteAction extends AbstractAction {
    public GotoFavoriteAction() {
      putValue(SMALL_ICON, new ImageIcon("images/fav.gif"));
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_G));
      updateProperties();
    }
    public void updateProperties() {
      putValue(NAME, "Go to number " + favoriteNumber);
      putValue(SHORT_DESCRIPTION, "Change the number to " + favoriteNumber);
    }
    public void actionPerformed(ActionEvent ae) {
      setChannel(favoriteNumber);
    }
  }
  public class SetFavoriteAction extends AbstractAction {
    public SetFavoriteAction() {
      putValue(NAME, "Set "Go to" number");
      putValue(SMALL_ICON, new ImageIcon("images/set.gif"));
      putValue(SHORT_DESCRIPTION, "Make current number the Favorite number");
      putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_S));
    }
    public void actionPerformed(ActionEvent ae) {
      favoriteNumber = currentNumber;
      gotoFavoriteAction.updateProperties();
      setEnabled(false);
      gotoFavoriteAction.setEnabled(false);
    }
  }
  public MainClass() {
    super();
    setChannel(currentNumber);
    numberLabel.setHorizontalAlignment(JLabel.CENTER);
    numberLabel.setFont(new Font("Serif", Font.PLAIN, 32));
    getContentPane().add(numberLabel, BorderLayout.NORTH);
    JPanel buttonPanel = new JPanel(new GridLayout(2, 2, 16, 6));
    buttonPanel.setBorder(BorderFactory.createEmptyBorder(6, 16, 16, 16));
    getContentPane().add(buttonPanel, BorderLayout.CENTER);
    buttonPanel.add(new JButton(upAction));
    buttonPanel.add(new JButton(gotoFavoriteAction));
    buttonPanel.add(new JButton(downAction));
    buttonPanel.add(new JButton(setFavoriteAction));
    JMenuBar mb = new JMenuBar();
    JMenu menu = new JMenu("Number");
    menu.add(new JMenuItem(upAction));
    menu.add(new JMenuItem(downAction));
    menu.addSeparator();
    menu.add(new JMenuItem(gotoFavoriteAction));
    menu.add(new JMenuItem(setFavoriteAction));
    mb.add(menu);
    setJMenuBar(mb);
  }
  public void setChannel(int chan) {
    currentNumber = chan;
    numberLabel.setText("Now tuned to number: " + currentNumber);
    downAction.setEnabled(currentNumber > MIN_NUMBER);
    upAction.setEnabled(currentNumber < MAX_NUMBER);
    gotoFavoriteAction.setEnabled(currentNumber != favoriteNumber);
    setFavoriteAction.setEnabled(currentNumber != favoriteNumber);
  }
  public static void main(String argv[]) {
    JFrame f = new MainClass();
    f.setSize(400, 180);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
  }
}

Action.SHORT_DESCRIPTION

import java.awt.BorderLayout;
import java.awt.ruponent;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
public class MainClass {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Mnemonic/Accelerator Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    final Action printAction = new PrintHelloAction();
    JMenuBar menuBar = new JMenuBar();
    JMenu menu = new JMenu("File");
    menuBar.add(menu);
    JMenuItem menuItem = new JMenuItem("Print");
    KeyStroke ctrlP = KeyStroke.getKeyStroke(KeyEvent.VK_P,
        InputEvent.CTRL_MASK);
    menuItem.setAccelerator(ctrlP);
    menuItem.addActionListener(printAction);
    menu.add(menuItem);
    JButton fileButton = new JButton("About");
    fileButton.setMnemonic(KeyEvent.VK_A);
    fileButton.addActionListener(printAction);
    frame.setJMenuBar(menuBar);
    frame.add(fileButton, BorderLayout.SOUTH);
    frame.setSize(300, 100);
    frame.setVisible(true);
  }
}
class PrintHelloAction extends AbstractAction {
  private static final Icon printIcon = new MyIcon();
  PrintHelloAction() {
    super("Print", printIcon);
    putValue(Action.SHORT_DESCRIPTION, "Hello, World");
  }
  public void actionPerformed(ActionEvent actionEvent) {
    System.out.println("Hello, World");
  }
}
class MyIcon implements Icon {
  public int getIconWidth() {
    return 32;
  }
  public int getIconHeight() {
    return 32;
  }
  public void paintIcon(Component c, Graphics g, int x, int y) {
    g.drawString("jexp.ru", 0, 20);
  }
}

Action.SMALL_ICON

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JToolBar;
import javax.swing.plaf.metal.MetalIconFactory;
public class MainClass {
  public static void main(String[] a) {
    final int STRING_POSITION = 1;
    Object buttonColors[][] = { { Color.RED, "RED" }, { Color.BLUE, "BLUE" },
        { Color.GREEN, "GREEN" }, { Color.BLACK, "BLACK" }, null, // separator
        { Color.CYAN, "CYAN" } };
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new TheActionListener();
    JToolBar toolbar = new JToolBar();
    toolbar.setRollover(true);
    for (Object[] color : buttonColors) {
      if (color == null) {
        toolbar.addSeparator();
      } else {
        Icon icon = MetalIconFactory.getTreeComputerIcon();
        JButton button = new JButton(icon);
        button.setActionCommand((String) color[STRING_POSITION]);
        button.addActionListener(actionListener);
        toolbar.add(button);
      }
    }
    Action action = new ShowAction(toolbar);
    JButton button = new JButton(action);
    toolbar.add(button);
    Container contentPane = frame.getContentPane();
    contentPane.add(toolbar, BorderLayout.NORTH);
    JTextArea textArea = new JTextArea();
    JScrollPane pane = new JScrollPane(textArea);
    contentPane.add(pane, BorderLayout.CENTER);
    frame.setSize(350, 150);
    frame.setVisible(true);
  }
  public static class TheActionListener implements ActionListener {
    public void actionPerformed(ActionEvent actionEvent) {
      System.out.println(actionEvent.getActionCommand());
    }
  };
}
class ShowAction extends AbstractAction {
  Component parentComponent;
  public ShowAction(Component parentComponent) {
    super("About");
    putValue(Action.MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
    putValue(Action.SMALL_ICON, MetalIconFactory.getFileChooserHomeFolderIcon());
    this.parentComponent = parentComponent;
  }
  public void actionPerformed(ActionEvent actionEvent) {
        JOptionPane.showMessageDialog(parentComponent, "About Swing",
            "About Box V2.0", JOptionPane.INFORMATION_MESSAGE);
  }
}