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:Main.java

public static void main(String[] args) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setUndecorated(true);//  w  w  w.  j  a  v  a  2  s . co  m
    JPanel panel = new JPanel();
    panel.add(new JLabel("Stackoverflow!"));
    panel.add(new JButton(new AbstractAction("Close") {
        @Override
        public void actionPerformed(ActionEvent e) {
            System.exit(0);
        }
    }));
    f.add(panel);
    f.pack();
    f.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel();
    panel.setBorder(BorderFactory.createLineBorder(Color.RED));
    BoxLayout mgr = new BoxLayout(panel, BoxLayout.Y_AXIS);
    panel.setLayout(mgr);//w  w  w .j  a va2  s  .  co m
    for (int i = 0; i < 5; i++) {
        JButton button = new JButton("Remove Hello World " + (i + 1));
        button.setAlignmentX(Component.CENTER_ALIGNMENT);
        button.addActionListener(e -> {
            panel.remove(button);
            panel.revalidate();
            panel.repaint();
        });
        panel.add(button);
    }
    frame.add(panel);
    frame.pack();
    frame.setVisible(true);
}

From source file:UsingContainerListener.java

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

    JPanel buttonPanel = new JPanel();
    buttonPanel.addContainerListener(new ContainerListener() {

        public void componentAdded(ContainerEvent e) {
            displayMessage(" added to ", e);
        }//from  w w  w  .j ava2s  .  co m

        public void componentRemoved(ContainerEvent e) {
            displayMessage(" removed from ", e);
        }

        void displayMessage(String action, ContainerEvent e) {
            System.out.println(((JButton) e.getChild()).getText() + " was" + action
                    + e.getContainer().getClass().getName());
        }
    });
    buttonPanel.add(new JButton("A"));

    frame.add(buttonPanel);

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

From source file:MainClass.java

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

    JPanel panel = new JPanel();
    panel.setToolTipText("<HtMl>Tooltip<br>Message");
    frame.add(panel, BorderLayout.CENTER);

    JButton button = new JButton("Hello, World") {
        public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setBackground(Color.YELLOW);
            tip.setForeground(Color.RED);
            return tip;
        }//  w  w w .jav a  2 s .  c  o m

        public boolean contains(int x, int y) {
            if (x < 100) {
                setToolTipText("x < 100");
            } else {
                setToolTipText("else");
            }
            return super.contains(x, y);
        }
    };

    button.setToolTipText("Hello, World");
    frame.add(button, BorderLayout.NORTH);

    frame.setSize(300, 150);
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JTabbedPane tab = new JTabbedPane();
    tab.addTab("A", new JPanel());
    tab.addTab("+", new JPanel());
    tab.getModel().addChangeListener(new ChangeListener() {
        private int lastSelected;
        private boolean ignore = false;

        @Override//from ww w.j  a va2  s  .c om
        public void stateChanged(ChangeEvent e) {
            if (!ignore) {
                ignore = true;
                try {
                    int selected = tab.getSelectedIndex();
                    String title = tab.getTitleAt(selected);
                    if ("+".equals(title)) {
                        JPanel pane = new JPanel();
                        tab.insertTab("Tab" + (tab.getTabCount() - 1), null, pane, null, lastSelected + 1);
                        tab.setSelectedComponent(pane);
                    } else {
                        lastSelected = selected;
                    }
                } finally {
                    ignore = false;
                }
            }
        }
    });
    final JButton btn = new JButton("Add");
    btn.addActionListener(e -> System.out.println(tab.getTabCount()));

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(tab);
    frame.add(btn, BorderLayout.SOUTH);
    frame.pack();
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice vc = env.getDefaultScreenDevice();
    JFrame window = new JFrame();
    JPanel comp = new JPanel();
    comp.setBackground(Color.RED);
    window.add(comp);//from  www .j  a v  a 2  s. co m
    window.setUndecorated(true);
    window.setResizable(false);
    vc.setFullScreenWindow(window);
}

From source file:Main.java

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

    JPanel contentPane = new JPanel();

    JFormattedTextField ftf = new JFormattedTextField(NumberFormat.getNumberInstance());
    ftf.setColumns(10);/* www  .j a v a  2  s .  co m*/
    ftf.setFocusLostBehavior(JFormattedTextField.PERSIST);
    ftf.setValue(100);
    lastValidValue = "100";
    ftf.addCaretListener(e -> {
        System.out.println("Last Valid Value : " + lastValidValue);
        if (ftf.isEditValid()) {
            String latestValue = ftf.getText();
            System.out.println("Latest Value : " + latestValue);
            if (!(latestValue.equals(lastValidValue)))
                ftf.setBackground(Color.YELLOW.darker());
            else {
                lastValidValue = ftf.getText();
                ftf.setBackground(Color.WHITE);
            }
        } else {
            System.out.println("Invalid Edit Entered.");
        }
    });
    contentPane.add(ftf);
    frame.setContentPane(contentPane);
    frame.pack();
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JFrame dialog = new JFrame();
    dialog.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    dialog.setResizable(true);/*  w  w  w. j  a v a 2  s  . c  o  m*/

    JPanel guiHolder = new JPanel();
    guiHolder.setLayout(new GridBagLayout());
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.gridx = 0;
    gbc.gridy = 0;
    gbc.anchor = GridBagConstraints.PAGE_START;
    gbc.weightx = 1.0;
    gbc.weighty = 1.0;
    guiHolder.add(new JLabel("my test"), gbc);

    dialog.add(guiHolder);
    dialog.setSize(new Dimension(320, 240));
    dialog.setVisible(true);
}

From source file:ActiveSample.java

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

    UIManager.put(LABEL_FACTORY, new ActiveLabel());

    final JPanel panel = new JPanel();

    JButton button = new JButton("Get");
    ActionListener actionListener = new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            JLabel label = (JLabel) UIManager.get(LABEL_FACTORY);
            panel.add(label);/*  w w w .  java2s  .  co m*/
            panel.revalidate();
        }
    };
    button.addActionListener(actionListener);

    frame.add(panel, BorderLayout.CENTER);
    frame.add(button, BorderLayout.SOUTH);
    frame.setSize(200, 200);
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JFrame frame = new JFrame("GridLayout");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame.getContentPane();

    JPanel buttonPanel = new JPanel();
    buttonPanel.setLayout(new GridLayout(3, 0));

    for (int i = 1; i <= 9; i++) {
        buttonPanel.add(new JButton("Button  " + i));
    }//from   w w  w. j a  va 2  s  .  com

    contentPane.add(buttonPanel, BorderLayout.CENTER);
    frame.pack();
    frame.setVisible(true);
}