Example usage for javax.swing JPanel JPanel

Introduction

In this page you can find the example usage for javax.swing JPanel JPanel.

Prototype

public JPanel() 

Source Link

Document

Creates a new JPanel with a double buffer and a flow layout.

Usage

From source file:BoxLayoutDemo.java

public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();
    p.setLayout(new BoxLayout(p, BoxLayout.PAGE_AXIS));
    p.add(createComponent("Component 1"));
    p.add(Box.createVerticalGlue());
    p.add(createComponent("Component 2"));
    p.add(createComponent("Component 3"));
    p.add(createComponent("Component 4"));
    frame.setContentPane(p);/*  w ww .  j a  v a2s  .c  o m*/

    //Display the window.
    frame.pack();
    frame.setVisible(true);
}

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From source file:Main.java

public static void main(String[] args) {
    int BTN_COUNT = 3;
    int VERT_GAP = 10;
    int EB_GAP = 5;
    float TITLE_SIZE = 36f;
    String TITLE_TEXT = "This is my Title";

    JLabel titleLabel = new JLabel(TITLE_TEXT, SwingConstants.CENTER);
    titleLabel.setFont(titleLabel.getFont().deriveFont(TITLE_SIZE));
    JPanel titlePanel = new JPanel();
    titlePanel.add(titleLabel);/*from w  w w.ja  va  2  s.c om*/

    JPanel buttonPanel = new JPanel(new GridLayout(1, 0, 5, 0));
    for (int i = 0; i < BTN_COUNT; i++) {
        JButton btn = new JButton("Button " + (i + 1));
        buttonPanel.add(btn);
    }

    JTextArea textArea = new JTextArea(20, 30);

    JPanel mainPanel = new JPanel();
    mainPanel.setBorder(BorderFactory.createEmptyBorder(EB_GAP, EB_GAP, EB_GAP, EB_GAP));
    mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.PAGE_AXIS));
    mainPanel.add(titlePanel);
    mainPanel.add(Box.createVerticalStrut(VERT_GAP));
    mainPanel.add(buttonPanel);
    mainPanel.add(Box.createVerticalStrut(VERT_GAP));
    mainPanel.add(new JScrollPane(textArea));

    JFrame frame = new JFrame();
    frame.getContentPane().add(mainPanel, BorderLayout.CENTER);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);

}

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From source file:Main.java

public static void main(String[] args) {
    final JTextPane tp = new JTextPane();
    JButton withFocus = new JButton("Select with focus");
    withFocus.addActionListener(e -> {
        tp.selectAll();//from   ww  w. j  a  v a  2 s  .c  o m
        tp.requestFocus();
    });
    JButton withOutFocus = new JButton("Select without focus");
    withFocus.addActionListener(e -> tp.selectAll());

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLayout(new BorderLayout());
    frame.add(new JScrollPane(tp));
    JPanel panel = new JPanel();
    panel.add(withFocus);
    panel.add(withOutFocus);
    frame.add(panel, BorderLayout.SOUTH);
    frame.pack();
    frame.setVisible(true);
}

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From source file:MenuDemo1.java

public static void main(String[] args) {
    // Create a window for this demo
    JFrame frame = new JFrame("Menu Demo");
    JPanel panel = new JPanel();
    frame.getContentPane().add(panel, "Center");

    // Create an action listener for the menu items we will create
    // The MenuItemActionListener class is defined below
    ActionListener listener = new MenuItemActionListener(panel);

    // Create some menu panes, and fill them with menu items
    // The menuItem() method is important.  It is defined below.
    JMenu file = new JMenu("File");
    file.setMnemonic('F');
    file.add(menuItem("New", listener, "new", 'N', KeyEvent.VK_N));
    file.add(menuItem("Open...", listener, "open", 'O', KeyEvent.VK_O));
    file.add(menuItem("Save", listener, "save", 'S', KeyEvent.VK_S));
    file.add(menuItem("Save As...", listener, "saveas", 'A', KeyEvent.VK_A));

    JMenu edit = new JMenu("Edit");
    edit.setMnemonic('E');
    edit.add(menuItem("Cut", listener, "cut", 0, KeyEvent.VK_X));
    edit.add(menuItem("Copy", listener, "copy", 'C', KeyEvent.VK_C));
    edit.add(menuItem("Paste", listener, "paste", 0, KeyEvent.VK_V));

    // Create a menubar and add these panes to it.
    JMenuBar menubar = new JMenuBar();
    menubar.add(file);/*ww w .jav  a 2s.  c  om*/
    menubar.add(edit);

    // Add menubar to the main window.  Note special method to add menubars
    frame.setJMenuBar(menubar);

    // Now create a popup menu and add the some stuff to it
    final JPopupMenu popup = new JPopupMenu();
    popup.add(menuItem("Open...", listener, "open", 0, 0));
    popup.addSeparator(); // Add a separator between items
    JMenu colors = new JMenu("Colors"); // Create a submenu
    popup.add(colors); // and add it to the popup menu
    // Now fill the submenu with mutually-exclusive radio buttons
    ButtonGroup colorgroup = new ButtonGroup();
    colors.add(radioItem("Red", listener, "color(red)", colorgroup));
    colors.add(radioItem("Green", listener, "color(green)", colorgroup));
    colors.add(radioItem("Blue", listener, "color(blue)", colorgroup));

    // Arrange to display the popup menu when the user clicks in the window
    panel.addMouseListener(new MouseAdapter() {
        public void mousePressed(MouseEvent e) {
            // Check whether this is the right type of event to pop up a popup
            // menu on this platform.  Usually checks for right button down.
            if (e.isPopupTrigger())
                popup.show((Component) e.getSource(), e.getX(), e.getY());
        }
    });

    // Finally, make our main window appear
    frame.setSize(450, 300);
    frame.setVisible(true);
}

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From source file:LoadSave.java

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();/*from  w  w  w . j a  va  2 s  . c  om*/
            }
        }
    };
    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);
}

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From source file:SharedDataSample.java

public static void main(String args[]) {
    final String labels[] = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J" };
    final DefaultComboBoxModel model = new DefaultComboBoxModel(labels);

    JFrame frame = new JFrame("Shared Data");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame.getContentPane();

    JPanel panel = new JPanel();
    JComboBox comboBox1 = new JComboBox(model);
    comboBox1.setMaximumRowCount(5);/*from  ww  w  .j  av a 2 s .  c o m*/
    comboBox1.setEditable(true);

    JComboBox comboBox2 = new JComboBox(model);
    comboBox2.setMaximumRowCount(5);
    comboBox2.setEditable(true);
    panel.add(comboBox1);
    panel.add(comboBox2);
    contentPane.add(panel, BorderLayout.NORTH);

    JList jlist = new JList(model);
    JScrollPane scrollPane = new JScrollPane(jlist);
    contentPane.add(scrollPane, BorderLayout.CENTER);

    JButton button = new JButton("Add");
    contentPane.add(button, BorderLayout.SOUTH);
    ActionListener actionListener = new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            int index = (int) (Math.random() * labels.length);
            model.addElement(labels[index]);
        }
    };
    button.addActionListener(actionListener);

    frame.setSize(300, 200);
    frame.setVisible(true);
}

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From source file:Main.java

public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel buttonPanel = new JPanel();
    buttonPanel.add(new JButton(new AbstractAction("Update") {
        @Override//  w w  w  .  j av a  2 s  .c om
        public void actionPerformed(ActionEvent ae) {

            StyledDocument doc = (StyledDocument) textPane.getDocument();
            SimpleAttributeSet style = new SimpleAttributeSet();
            StyleConstants.setFontFamily(style, "Serif");
            StyleConstants.setFontSize(style, size++);
            try {
                doc.insertString(doc.getLength(), " one two three", style);
                Dimension d = textPane.getPreferredSize();
                Rectangle r = textPane.modelToView(textPane.getDocument().getLength());
                d.height = r.y + r.height;
                textPane.setPreferredSize(d);
            } catch (BadLocationException e) {
                e.printStackTrace();
            }
            frame.pack();
        }

    }));
    frame.add(buttonPanel, BorderLayout.NORTH);
    textPane.setText("this is a test.");
    textPane.setBorder(new LineBorder(Color.BLACK));

    frame.add(new JScrollPane(textPane));
    frame.pack();
    frame.setVisible(true);
}

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From source file:MaxLengthDocument.java

public static void main(String[] args) {
    Document doc = new MaxLengthDocument(5);
    JTextField field = new JTextField(doc, "", 8);

    JPanel flowPanel = new JPanel();
    flowPanel.add(field);//from  www.j a va 2  s  . com
    JFrame frame = new JFrame("MaxLengthDocument demo");
    frame.setContentPane(flowPanel);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(160, 80);
    frame.setVisible(true);
}

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From source file:PassiveTextField1.java

public static void main(String[] args) {
    JFrame f = new JFrame("Passive Text Field");
    f.getContentPane().setLayout(new BoxLayout(f.getContentPane(), BoxLayout.Y_AXIS));
    final JTextField ptf = new JTextField(32);
    JTextField tf = new JTextField(32);
    JPanel p = new JPanel();
    JButton b = new JButton("OK");
    p.add(b);/* w w w.  j a va2s  . c o  m*/
    f.getContentPane().add(ptf);
    f.getContentPane().add(tf);
    f.getContentPane().add(p);

    Keymap map = ptf.getKeymap(); // Gets the shared map
    KeyStroke key = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
    map.removeKeyStrokeBinding(key);

    ActionListener l = new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            System.out.println("Action event from a text field");
        }
    };
    ptf.addActionListener(l);
    tf.addActionListener(l);

    // Make the button the default button
    f.getRootPane().setDefaultButton(b);
    b.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            System.out.println("Content of text field: <" + ptf.getText() + ">");
        }
    });
    f.pack();
    f.setVisible(true);
}

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From source file:InvokeExample.java

public static void main(String[] args) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();
    p.add(good);/*w  w  w  . j  a v  a  2 s.co m*/
    p.add(bad);
    p.add(bad2);

    Container c = f.getContentPane();
    c.setLayout(new BorderLayout());
    c.add(p, BorderLayout.CENTER);
    c.add(resultLabel, BorderLayout.SOUTH);

    good.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ev) {
            resultLabel.setText("Working . . .");
            setEnabled(false);
            Thread worker = new Thread() {
                public void run() {
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException ex) {
                    }

                    SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                            resultLabel.setText("Ready");
                            setEnabled(true);
                        }
                    });
                }
            };
            worker.start();
        }
    });

    bad.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ev) {
            resultLabel.setText("Working . . .");
            setEnabled(false);
            try {
                Thread.sleep(5000);
            } catch (InterruptedException ex) {
            }
            resultLabel.setText("Ready");
            setEnabled(true);
        }
    });

    bad2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ev) {
            resultLabel.setText("Working . . . ");
            setEnabled(false);
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    try {
                        Thread.sleep(5000); // Dispatch thread is starving!
                    } catch (InterruptedException ex) {
                    }

                    resultLabel.setText("Ready");
                    setEnabled(true);
                }
            });
        }
    });

    f.setSize(300, 100);
    f.setVisible(true);
}

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