import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.awt.image.BufferedImage;/* * FrameDemo2.java shows off the window decoration features added in * 1.4, plus some window positioning code and (optionally) * setIconImage. It uses the file images/FD.jpg. */public class FrameDemo2 extends WindowAdapter                        implements ActionListener {    private Point lastLocation = null;    private int maxX = 500;    private int maxY = 500;    //the main frame's default button    private static JButton defaultButton = null;    //constants for action commands    protected final static String NO_DECORATIONS = "no_dec";    protected final static String LF_DECORATIONS = "laf_dec";    protected final static String WS_DECORATIONS = "ws_dec";    protected final static String CREATE_WINDOW = "new_win";    protected final static String DEFAULT_ICON = "def_icon";    protected final static String FILE_ICON = "file_icon";    protected final static String PAINT_ICON = "paint_icon";    //true if the next frame created should have no window decorations    protected boolean noDecorations = false;    //true if the next frame created should have setIconImage called    protected boolean specifyIcon = false;    //true if the next frame created should have a custom painted icon    protected boolean createIcon = false;    //Perform some initialization.    public FrameDemo2() {        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();        maxX = screenSize.width - 50;        maxY = screenSize.height - 50;    }    //Create a new MyFrame object and show it.    public void showNewWindow() {        JFrame frame = new MyFrame();        //Take care of the no window decorations case.        //NOTE: Unless you really need the functionality        //provided by JFrame, you would usually use a        //Window or JWindow instead of an undecorated JFrame.        if (noDecorations) {            frame.setUndecorated(true);        }        //Set window location.        if (lastLocation != null) {            //Move the window over and down 40 pixels.            lastLocation.translate(40, 40);            if ((lastLocation.x > maxX) || (lastLocation.y > maxY)) {                lastLocation.setLocation(0, 0);            }            frame.setLocation(lastLocation);        } else {            lastLocation = frame.getLocation();        }        //Calling setIconImage sets the icon displayed when the window        //is minimized.  Most window systems (or look and feels, if        //decorations are provided by the look and feel) also use this        //icon in the window decorations.        if (specifyIcon) {            if (createIcon) {                frame.setIconImage(createFDImage()); //create an icon from scratch            } else {                frame.setIconImage(getFDImage());    //get the icon from a file            }        }        //Show window.        frame.setSize(new Dimension(170, 100));        frame.setVisible(true);    }    // Create the window-creation controls that go in the main window.    protected JComponent createOptionControls() {        JLabel label1 = new JLabel("Decoration options for subsequently created frames:");        ButtonGroup bg1 = new ButtonGroup();        JLabel label2 = new JLabel("Icon options:");        ButtonGroup bg2 = new ButtonGroup();        //Create the buttons        JRadioButton rb1 = new JRadioButton();        rb1.setText("Look and feel decorated");        rb1.setActionCommand(LF_DECORATIONS);        rb1.addActionListener(this);        rb1.setSelected(true);        bg1.add(rb1);        //        JRadioButton rb2 = new JRadioButton();        rb2.setText("Window system decorated");        rb2.setActionCommand(WS_DECORATIONS);        rb2.addActionListener(this);        bg1.add(rb2);        //        JRadioButton rb3 = new JRadioButton();        rb3.setText("No decorations");        rb3.setActionCommand(NO_DECORATIONS);        rb3.addActionListener(this);        bg1.add(rb3);        //        //        JRadioButton rb4 = new JRadioButton();        rb4.setText("Default icon");        rb4.setActionCommand(DEFAULT_ICON);        rb4.addActionListener(this);        rb4.setSelected(true);        bg2.add(rb4);        //        JRadioButton rb5 = new JRadioButton();        rb5.setText("Icon from a JPEG file");        rb5.setActionCommand(FILE_ICON);        rb5.addActionListener(this);        bg2.add(rb5);        //        JRadioButton rb6 = new JRadioButton();        rb6.setText("Painted icon");        rb6.setActionCommand(PAINT_ICON);        rb6.addActionListener(this);        bg2.add(rb6);        //Add everything to a container.        Box box = Box.createVerticalBox();        box.add(label1);        box.add(Box.createVerticalStrut(5)); //spacer        box.add(rb1);        box.add(rb2);        box.add(rb3);        //        box.add(Box.createVerticalStrut(15)); //spacer        box.add(label2);        box.add(Box.createVerticalStrut(5)); //spacer        box.add(rb4);        box.add(rb5);        box.add(rb6);        //Add some breathing room.        box.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));        return box;    }    //Create the button that goes in the main window.    protected JComponent createButtonPane() {        JButton button = new JButton("New window");        button.setActionCommand(CREATE_WINDOW);        button.addActionListener(this);        defaultButton = button; //Used later to make this the frame's default button.        //Center the button in a panel with some space around it.        JPanel pane = new JPanel(); //use default FlowLayout        pane.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));        pane.add(button);        return pane;    }    //Handle action events from all the buttons.    public void actionPerformed(ActionEvent e) {        String command = e.getActionCommand();        //Handle the New window button.        if (CREATE_WINDOW.equals(command)) {            showNewWindow();        //Handle the first group of radio buttons.        } else if (NO_DECORATIONS.equals(command)) {            noDecorations = true;            JFrame.setDefaultLookAndFeelDecorated(false);        } else if (WS_DECORATIONS.equals(command)) {            noDecorations = false;            JFrame.setDefaultLookAndFeelDecorated(false);        } else if (LF_DECORATIONS.equals(command)) {            noDecorations = false;            JFrame.setDefaultLookAndFeelDecorated(true);        //Handle the second group of radio buttons.        } else if (DEFAULT_ICON.equals(command)) {            specifyIcon = false;        } else if (FILE_ICON.equals(command)) {            specifyIcon = true;            createIcon = false;        } else if (PAINT_ICON.equals(command)) {            specifyIcon = true;            createIcon = true;        }    }    //Creates an icon-worthy Image from scratch.    protected static Image createFDImage() {        //Create a 16x16 pixel image.        BufferedImage bi = new BufferedImage(16, 16, BufferedImage.TYPE_INT_RGB);        //Draw into it.        Graphics g = bi.getGraphics();        g.setColor(Color.BLACK);        g.fillRect(0, 0, 15, 15);        g.setColor(Color.RED);        g.fillOval(5, 3, 6, 6);        //Clean up.        g.dispose();        //Return it.        return bi;    }    //Returns an Image or null.    protected static Image getFDImage() {        java.net.URL imgURL = FrameDemo2.class.getResource("images/FD.jpg");        if (imgURL != null) {            return new ImageIcon(imgURL).getImage();        } else {            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() {        //Use the Java look and feel.        try {            UIManager.setLookAndFeel(                UIManager.getCrossPlatformLookAndFeelClassName());        } catch (Exception e) { }        //Make sure we have nice window decorations.        JFrame.setDefaultLookAndFeelDecorated(true);        JDialog.setDefaultLookAndFeelDecorated(true);        //Instantiate the controlling class.        JFrame frame = new JFrame("FrameDemo2");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        FrameDemo2 demo = new FrameDemo2();        //Add components to it.        Container contentPane = frame.getContentPane();        contentPane.add(demo.createOptionControls(),                        BorderLayout.CENTER);        contentPane.add(demo.createButtonPane(),                        BorderLayout.PAGE_END);        frame.getRootPane().setDefaultButton(defaultButton);        //Display the window.        frame.pack();        frame.setLocationRelativeTo(null); //center it        frame.setVisible(true);    }    //Start the demo.    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();            }        });    }    class MyFrame extends JFrame implements ActionListener {        //Create a frame with a button.        public MyFrame() {            super("A window");            setDefaultCloseOperation(DISPOSE_ON_CLOSE);            //This button lets you close even an undecorated window.            JButton button = new JButton("Close window");            button.addActionListener(this);            //Place the button near the bottom of the window.            Container contentPane = getContentPane();            contentPane.setLayout(new BoxLayout(contentPane,                                                BoxLayout.PAGE_AXIS));            contentPane.add(Box.createVerticalGlue()); //takes all extra space            contentPane.add(button);            button.setAlignmentX(Component.CENTER_ALIGNMENT); //horizontally centered            contentPane.add(Box.createVerticalStrut(5)); //spacer        }        //Make the button do the same thing as the default close operation        //(DISPOSE_ON_CLOSE).        public void actionPerformed(ActionEvent e) {            setVisible(false);            dispose();        }    }}