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(boolean isDoubleBuffered) 

Source Link

Document

Creates a new JPanel with FlowLayout and the specified buffering strategy.

Usage

From source file:PasswordFieldSample.java

public static void main(String args[]) {
    String title = "Password Example";
    JFrame frame = new JFrame(title);
    Container content = frame.getContentPane();

    JPanel userPanel = new JPanel(new BorderLayout());
    JLabel userLabel = new JLabel("Username: ");
    userLabel.setDisplayedMnemonic(KeyEvent.VK_U);
    JTextField userTextField = new JTextField();
    userLabel.setLabelFor(userTextField);
    userPanel.add(userLabel, BorderLayout.WEST);
    userPanel.add(userTextField, BorderLayout.CENTER);

    JPanel passPanel = new JPanel(new BorderLayout());
    JLabel passLabel = new JLabel("Password: ");
    passLabel.setDisplayedMnemonic(KeyEvent.VK_P);
    JPasswordField passTextField = new JPasswordField();
    passLabel.setLabelFor(passTextField);
    passPanel.add(passLabel, BorderLayout.WEST);
    passPanel.add(passTextField, BorderLayout.CENTER);

    JPanel panel = new JPanel(new BorderLayout());
    panel.add(userPanel, BorderLayout.NORTH);
    panel.add(passPanel, BorderLayout.SOUTH);
    content.add(panel, BorderLayout.NORTH);

    frame.setSize(250, 150);/* w w  w . jav  a2 s  . c  o m*/
    frame.setVisible(true);
}

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From source file:Main.java

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

    JPanel panel = new JPanel(new GridLayout(0, 1));

    ButtonGroup group = new ButtonGroup();
    JRadioButton aRadioButton = new JRadioButton("A");
    JRadioButton bRadioButton = new JRadioButton("B");

    ActionListener crustActionListener = new ActionListener() {
        String lastSelected;//  w ww. j  a va2  s . com

        public void actionPerformed(ActionEvent actionEvent) {
            AbstractButton aButton = (AbstractButton) actionEvent.getSource();
            String label = aButton.getText();
            String msgStart;
            if (label.equals(lastSelected)) {
                msgStart = "Reselected: ";
            } else {
                msgStart = "Selected: ";
            }
            lastSelected = label;
            System.out.println(msgStart + label);
        }
    };

    panel.add(aRadioButton);
    group.add(aRadioButton);
    panel.add(bRadioButton);
    group.add(bRadioButton);

    aRadioButton.addActionListener(crustActionListener);
    bRadioButton.addActionListener(crustActionListener);

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

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From source file:JRadioButtonActionListener.java

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

    JPanel panel = new JPanel(new GridLayout(0, 1));

    ButtonGroup group = new ButtonGroup();
    JRadioButton aRadioButton = new JRadioButton("A");
    JRadioButton bRadioButton = new JRadioButton("B");

    ActionListener sliceActionListener = new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            AbstractButton aButton = (AbstractButton) actionEvent.getSource();
            System.out.println("Selected: " + aButton.getText());
        }//from  w ww . java 2  s.c o  m
    };

    panel.add(aRadioButton);
    group.add(aRadioButton);
    panel.add(bRadioButton);
    group.add(bRadioButton);

    aRadioButton.addActionListener(sliceActionListener);
    bRadioButton.addActionListener(sliceActionListener);

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

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From source file:LabelSampleLoadText.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Label Focus Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel(new BorderLayout());
    JLabel label = new JLabel("Name: ");
    label.setDisplayedMnemonic(KeyEvent.VK_N);
    JTextField textField = new JTextField();
    label.setLabelFor(textField);/*from  ww  w.jav a2 s.  com*/
    panel.add(label, BorderLayout.WEST);
    panel.add(textField, BorderLayout.CENTER);
    frame.add(panel, BorderLayout.NORTH);
    frame.add(new JButton("Somewhere Else"), BorderLayout.SOUTH);
    frame.setSize(250, 150);
    frame.setVisible(true);

    FileReader reader = null;
    try {
        String filename = "test.txt";
        reader = new FileReader(filename);
        textField.read(reader, filename);
    } catch (IOException exception) {
        System.err.println("Load oops");
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException exception) {
                System.err.println("Error closing reader");
                exception.printStackTrace();
            }
        }
    }

}

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From source file:GridBagWithGridWidthHeight.java

public static void main(String[] args) {
    JFrame f = new JFrame("Demonstrates the use of gridwidth, gridheight constraints");
    JPanel p = new JPanel(new GridBagLayout());

    GridBagConstraints c = new GridBagConstraints();
    c.insets = new Insets(2, 2, 2, 2);
    c.weighty = 1.0;/*w  w  w. java 2  s  .c o  m*/
    c.weightx = 1.0;
    c.gridx = 0;
    c.gridy = 0;
    c.gridheight = 2; // span across 2 rows
    p.add(new JButton("Java"), c);
    c.gridx = 1;
    c.gridheight = 1; // set back to 1 row
    c.gridwidth = 2; // span across 2 columns
    p.add(new JButton("Source"), c);
    c.gridy = 1;
    c.gridwidth = 1; // set back to 1 column
    p.add(new JButton("and"), c);
    c.gridx = 2;
    p.add(new JButton("Support."), c);

    WindowListener wndCloser = new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }
    };
    f.addWindowListener(wndCloser);

    f.getContentPane().add(p);
    f.setSize(600, 200);
    f.show();
}

---

From source file:LabelSampleSaveText.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Label Focus Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel(new BorderLayout());
    JLabel label = new JLabel("Name: ");
    label.setDisplayedMnemonic(KeyEvent.VK_N);
    JTextField textField = new JTextField();
    label.setLabelFor(textField);//from w ww .  j av a  2  s .c  o  m
    panel.add(label, BorderLayout.WEST);
    panel.add(textField, BorderLayout.CENTER);
    frame.add(panel, BorderLayout.NORTH);
    frame.add(new JButton("Somewhere Else"), BorderLayout.SOUTH);
    frame.setSize(250, 150);
    frame.setVisible(true);

    textField.setText("your text");
    String filename = "test.txt";

    FileWriter writer = null;
    try {
        writer = new FileWriter(filename);
        textField.write(writer);
    } catch (IOException exception) {
        System.err.println("Save oops");
    } finally {
        if (writer != null) {
            try {
                writer.close();
            } catch (IOException exception) {
                System.err.println("Error closing writer");
                exception.printStackTrace();
            }
        }
    }
}

---

From source file:Main.java

public static void main(String[] args) {
    JTextField[] txtAllAverages;//from   ww w  .ja  va2s  .  co  m
    int testCount = 2;

    txtAllAverages = new JTextField[testCount];

    JPanel inputControls = new JPanel(new BorderLayout(5, 5));

    JPanel inputControlsLabels = new JPanel(new GridLayout(0, 1, 3, 3));
    JPanel inputControlsFields = new JPanel(new GridLayout(0, 1, 3, 3));
    inputControls.add(inputControlsLabels, BorderLayout.WEST);
    inputControls.add(inputControlsFields, BorderLayout.CENTER);
    for (int i = 0; i < testCount; i++) {
        inputControlsLabels.add(new JLabel("Test score: "));
        JTextField field = new JTextField(10);
        inputControlsFields.add(field);
        txtAllAverages[i] = field;
    }

    JPanel controls = new JPanel(new FlowLayout(FlowLayout.CENTER, 5, 2));

    controls.add(new JButton("Reset"));
    controls.add(new JButton("Submit"));

    JPanel gui = new JPanel(new BorderLayout(10, 10));
    gui.setBorder(new TitledBorder("Averages"));
    gui.add(inputControls, BorderLayout.CENTER);
    gui.add(controls, BorderLayout.SOUTH);

    JFrame f = new JFrame();
    f.setContentPane(gui);

    f.pack();
    f.setLocationByPlatform(true);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
}

---

From source file:Main.java

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

    JPanel main = new JPanel(new GridLayout(2, 1));
    JPanel scrollBarPanel = new JPanel();
    final JScrollBar scrollBar = new JScrollBar(JScrollBar.HORIZONTAL, 0, 48, 0, 255);
    int height = scrollBar.getPreferredSize().height;
    scrollBar.setPreferredSize(new Dimension(175, height));
    scrollBarPanel.add(scrollBar);/*from   w  w  w.j a va2s. c om*/
    main.add(scrollBarPanel);

    JPanel sliderPanel = new JPanel();
    final JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 255, 128);
    slider.setMajorTickSpacing(48);
    slider.setMinorTickSpacing(16);
    slider.setPaintTicks(true);
    sliderPanel.add(slider);
    main.add(sliderPanel);

    frame.add(main, BorderLayout.CENTER);

    scrollBar.addAdjustmentListener(new AdjustmentListener() {
        public void adjustmentValueChanged(AdjustmentEvent e) {
            System.out.println("JScrollBar's current value = " + scrollBar.getValue());
        }
    });

    slider.addChangeListener(new ChangeListener() {
        public void stateChanged(ChangeEvent e) {
            System.out.println("JSlider's current value = " + slider.getValue());
        }
    });

    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
}

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From source file:JRadioButtonItemListener.java

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

    JPanel panel = new JPanel(new GridLayout(0, 1));

    ButtonGroup group = new ButtonGroup();
    JRadioButton aRadioButton = new JRadioButton("A");
    JRadioButton bRadioButton = new JRadioButton("B");

    ItemListener itemListener = new ItemListener() {
        String lastSelected;//from  w  w w  .j a  v a  2s.  c  o m

        public void itemStateChanged(ItemEvent itemEvent) {
            AbstractButton aButton = (AbstractButton) itemEvent.getSource();
            int state = itemEvent.getStateChange();
            String label = aButton.getText();
            String msgStart;
            if (state == ItemEvent.SELECTED) {
                if (label.equals(lastSelected)) {
                    msgStart = "Reselected -> ";
                } else {
                    msgStart = "Selected -> ";
                }
                lastSelected = label;
            } else {
                msgStart = "Deselected -> ";
            }
            System.out.println(msgStart + label);
        }
    };

    panel.add(aRadioButton);
    group.add(aRadioButton);
    panel.add(bRadioButton);
    group.add(bRadioButton);

    aRadioButton.addItemListener(itemListener);
    bRadioButton.addItemListener(itemListener);

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

---

From source file:Main.java

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

    JPanel panel = new JPanel(new GridLayout(0, 1));

    ButtonGroup group = new ButtonGroup();
    JRadioButton aRadioButton = new JRadioButton("A");
    JRadioButton bRadioButton = new JRadioButton("B");

    ChangeListener changeListener = new ChangeListener() {
        public void stateChanged(ChangeEvent changEvent) {
            AbstractButton aButton = (AbstractButton) changEvent.getSource();
            ButtonModel aModel = aButton.getModel();
            boolean armed = aModel.isArmed();
            boolean pressed = aModel.isPressed();
            boolean selected = aModel.isSelected();
            System.out.println("Changed: " + armed + "/" + pressed + "/" + selected);
        }/*w w w . ja  va2s .  c om*/
    };

    panel.add(aRadioButton);
    group.add(aRadioButton);
    panel.add(bRadioButton);
    group.add(bRadioButton);

    aRadioButton.addChangeListener(changeListener);
    bRadioButton.addChangeListener(changeListener);

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

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