Example usage for javax.swing JTextArea JTextArea

Introduction

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

Prototype

public JTextArea() 

Source Link

Document

Constructs a new TextArea.

Usage

From source file:ActionsMenuBar.java

public static void main(String args[]) {
    final JFrame frame = new JFrame("TextAction Usage");
    Container contentPane = frame.getContentPane();
    final JScrollPane scrollPane = new JScrollPane();
    contentPane.add(scrollPane, BorderLayout.CENTER);

    final JMenuBar menuBar = new JMenuBar();
    frame.setJMenuBar(menuBar);/*from   ww  w  .jav a  2s  . c om*/

    ActionListener actionListener = new ActionListener() {
        JTextComponent component;

        public void actionPerformed(ActionEvent actionEvent) {
            // Determine which component selected
            String command = actionEvent.getActionCommand();
            if (command.equals("JTextField")) {
                component = new JTextField();
            } else if (command.equals("JPasswordField")) {
                component = new JPasswordField();
            } else if (command.equals("JTextArea")) {
                component = new JTextArea();
            } else if (command.equals("JTextPane")) {
                component = new JTextPane();
            } else {
                component = new JEditorPane();
            }
            scrollPane.setViewportView(component);
            // Process action list
            Action actions[] = component.getActions();
            menuBar.removeAll();
            menuBar.revalidate();
            JMenu menu = null;
            for (int i = 0, n = actions.length; i < n; i++) {
                if ((i % 10) == 0) {
                    menu = new JMenu("From " + i);
                    menuBar.add(menu);
                }
                menu.add(actions[i]);
            }
            menuBar.revalidate();
        }
    };

    String components[] = { "JTextField", "JPasswordField", "JTextArea", "JTextPane", "JEditorPane" };
    final Container componentsContainer = RadioButtonUtils.createRadioButtonGrouping(components,
            "Pick to List Actions", actionListener);
    contentPane.add(componentsContainer, BorderLayout.WEST);

    frame.setSize(400, 300);
    frame.setVisible(true);
}

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From source file:UndoExample1.java

public static void main(String[] args) {
    try {/*from w  w w.j ava 2 s.c om*/
        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
    } catch (Exception evt) {
    }

    JFrame f = new UndoExample1();
    f.addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent evt) {
            System.exit(0);
        }
    });
    f.setSize(250, 300);
    f.setVisible(true);

    // Create and show a frame monitoring undoable edits
    JFrame undoMonitor = new JFrame("Undo Monitor");
    final JTextArea textArea = new JTextArea();
    textArea.setEditable(false);
    undoMonitor.getContentPane().add(new JScrollPane(textArea));
    undoMonitor.setBounds(f.getLocation().x + f.getSize().width, f.getLocation().y, 400, 200);
    undoMonitor.setVisible(true);

    pane.getDocument().addUndoableEditListener(new UndoableEditListener() {
        public void undoableEditHappened(UndoableEditEvent evt) {
            UndoableEdit edit = evt.getEdit();
            textArea.append(edit.getPresentationName() + "(" + edit.toString() + ")\n");
        }
    });

    // Create and show a frame monitoring document edits
    JFrame editMonitor = new JFrame("Edit Monitor");
    final JTextArea textArea2 = new JTextArea();
    textArea2.setEditable(false);
    editMonitor.getContentPane().add(new JScrollPane(textArea2));
    editMonitor.setBounds(undoMonitor.getLocation().x,
            undoMonitor.getLocation().y + undoMonitor.getSize().height, 400, 200);
    editMonitor.setVisible(true);

    pane.getDocument().addDocumentListener(new DocumentListener() {
        public void changedUpdate(DocumentEvent evt) {
            textArea2.append("Attribute change\n");
        }

        public void insertUpdate(DocumentEvent evt) {
            textArea2.append("Text insertion\n");
        }

        public void removeUpdate(DocumentEvent evt) {
            textArea2.append("Text removal\n");
        }
    });
}

---

From source file:SwingToolBarSample.java

public static void main(String args[]) {

    ActionListener actionListener = new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            System.out.println(actionEvent.getActionCommand());
        }//from ww w.  j  av a 2 s .c o m
    };

    JFrame frame = new JFrame("JToolBar Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JToolBar toolbar = new JToolBar();
    toolbar.putClientProperty("JToolBar.isRollover", Boolean.TRUE);

    for (int i = 0, n = buttonColors.length; i < n; i++) {
        Object color[] = buttonColors[i];
        if (color == null) {
            toolbar.addSeparator();
        } else {
            Icon icon = new DiamondIcon((Color) color[COLOR_POSITION], true, 20, 20);
            JButton button = new JButton(icon);
            button.setActionCommand((String) color[STRING_POSITION]);
            button.addActionListener(actionListener);
            toolbar.add(button);
        }
    }

    Action action = new ActionMenuSample.ShowAction(frame);
    toolbar.add(action);

    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);
}

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From source file:ThreadLister.java

/**
 * The main() method create a simple graphical user interface to display the
 * threads in. This allows us to see the "event dispatch thread" used by AWT
 * and Swing.//from  ww w .j av a2  s .  com
 */
public static void main(String[] args) {
    // Create a simple Swing GUI
    JFrame frame = new JFrame("ThreadLister Demo");
    JTextArea textarea = new JTextArea();
    frame.getContentPane().add(new JScrollPane(textarea), BorderLayout.CENTER);
    frame.setSize(500, 400);
    frame.setVisible(true);

    // Get the threadlisting as a string using a StringWriter stream
    StringWriter sout = new StringWriter(); // To capture the listing
    PrintWriter out = new PrintWriter(sout);
    ThreadLister.listAllThreads(out); // List threads to stream
    out.close();
    String threadListing = sout.toString(); // Get listing as a string

    // Finally, display the thread listing in the GUI
    textarea.setText(threadListing);
}

---

From source file:UndoManagerHelper.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Undo Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTextArea textArea = new JTextArea();
    JScrollPane scrollPane = new JScrollPane(textArea);

    UndoManager manager = new UndoManager();
    textArea.getDocument().addUndoableEditListener(manager);

    JToolBar toolbar = new JToolBar();
    JButton undoButton = new JButton(UndoManagerHelper.getUndoAction(manager));
    toolbar.add(undoButton);/*  ww  w  .  j a  va 2s. c  o m*/
    JButton redoButton = new JButton(UndoManagerHelper.getRedoAction(manager));
    toolbar.add(redoButton);
    frame.add(toolbar, BorderLayout.NORTH);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
}

---

From source file:com.novadart.silencedetect.SilenceDetect.java

public static void main(String[] args) {

    // create the parser
    CommandLineParser parser = new BasicParser();
    try {//from   ww w  .j  a  v  a 2s  .c  om
        // parse the command line arguments
        CommandLine line = parser.parse(OPTIONS, args);

        if (line.hasOption("h")) {

            printHelp();

        } else {

            String decibels = "-10";
            if (line.hasOption("b")) {
                decibels = "-" + line.getOptionValue("b");
            } else {
                throw new RuntimeException();
            }

            String videoFile = null;

            if (line.hasOption("i")) {

                videoFile = line.getOptionValue("i");

                Boolean debug = line.hasOption("d");

                if (line.hasOption("t")) {

                    System.out.println(printAudioTracksList(videoFile, debug));

                } else if (line.hasOption("s")) {

                    int trackNumber = Integer.parseInt(line.getOptionValue("s"));
                    System.out.println(printAudioTrackSilenceDuration(videoFile, trackNumber, decibels, debug));

                } else {

                    printHelp();

                }

            } else if (line.hasOption("-j")) {

                // choose file
                final JFileChooser fc = new JFileChooser();
                fc.setVisible(true);
                int returnVal = fc.showOpenDialog(null);
                if (returnVal == JFileChooser.APPROVE_OPTION) {

                    videoFile = fc.getSelectedFile().getAbsolutePath();

                } else {
                    return;
                }

                JTextArea tracks = new JTextArea();
                tracks.setText(printAudioTracksList(videoFile, true));
                JSpinner trackNumber = new JSpinner();
                trackNumber.setValue(1);
                final JComponent[] inputs = new JComponent[] { new JLabel("Audio Tracks"), tracks,
                        new JLabel("Track to analyze"), trackNumber };
                JOptionPane.showMessageDialog(null, inputs, "Select Audio Track", JOptionPane.PLAIN_MESSAGE);

                JTextArea results = new JTextArea();
                results.setText(printAudioTrackSilenceDuration(videoFile, (int) trackNumber.getValue(),
                        decibels, false));
                final JComponent[] resultsInputs = new JComponent[] { new JLabel("Results"), results };
                JOptionPane.showMessageDialog(null, resultsInputs, "RESULTS!", JOptionPane.PLAIN_MESSAGE);

            } else {
                printHelp();
                return;
            }

        }

    } catch (ParseException | IOException | InterruptedException exp) {
        // oops, something went wrong
        System.out.println("There was a problem :(\nReason: " + exp.getMessage());
    }
}

---

From source file:UndoExample5.java

public static void main(String[] args) {
    try {//from  w  ww . j av a2s  .co m
        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
    } catch (Exception evt) {
    }

    JFrame f = new UndoExample5();
    f.addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent evt) {
            System.exit(0);
        }
    });
    f.setSize(250, 300);
    f.setVisible(true);

    // Create and show a frame monitoring undoable edits
    JFrame undoMonitor = new JFrame("Undo Monitor");
    final JTextArea textArea = new JTextArea();
    textArea.setEditable(false);
    undoMonitor.getContentPane().add(new JScrollPane(textArea));
    undoMonitor.setBounds(f.getLocation().x + f.getSize().width, f.getLocation().y, 400, 200);
    undoMonitor.setVisible(true);

    pane.getDocument().addUndoableEditListener(new UndoableEditListener() {
        public void undoableEditHappened(UndoableEditEvent evt) {
            UndoableEdit edit = evt.getEdit();
            textArea.append(edit.getPresentationName() + "(" + edit.toString() + ")\n");
        }
    });

    // Create and show a frame monitoring document edits
    JFrame editMonitor = new JFrame("Edit Monitor");
    final JTextArea textArea2 = new JTextArea();
    textArea2.setEditable(false);
    editMonitor.getContentPane().add(new JScrollPane(textArea2));
    editMonitor.setBounds(undoMonitor.getLocation().x,
            undoMonitor.getLocation().y + undoMonitor.getSize().height, 400, 200);
    editMonitor.setVisible(true);

    pane.getDocument().addDocumentListener(new DocumentListener() {
        public void changedUpdate(DocumentEvent evt) {
            textArea2.append("Attribute change\n");
        }

        public void insertUpdate(DocumentEvent evt) {
            textArea2.append("Text insertion\n");
        }

        public void removeUpdate(DocumentEvent evt) {
            textArea2.append("Text removal\n");
        }
    });
}

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From source file:FileTransferHandler.java

/**
 * This class demonstrates the FileTransferHandler by installing it on a
 * JTextArea component and providing a JFileChooser to drag and cut files.
 */// w  w  w  .ja  va 2 s  .c o  m

public static void main(String[] args) {
    // Here's the text area. Note how we wrap our TransferHandler
    // around the default handler returned by getTransferHandler()
    JTextArea textarea = new JTextArea();
    TransferHandler defaultHandler = textarea.getTransferHandler();
    textarea.setTransferHandler(new FileTransferHandler(defaultHandler));
    // Here's a JFileChooser, with dragging explicitly enabled.
    JFileChooser filechooser = new JFileChooser();
    filechooser.setDragEnabled(true);

    // Display them both in a window
    JFrame f = new JFrame("File Transfer Handler Test");
    f.getContentPane().add(new JScrollPane(textarea), "Center");
    f.getContentPane().add(filechooser, "South");
    f.setSize(400, 600);
    f.setVisible(true);
}

---

From source file:Main.java

public static JTextArea newJTextArea() {
    JTextArea ret = new JTextArea();
    Insets insets = new Insets(4, 4, 4, 4);
    ret.setMargin(insets);// www. j  a v  a  2 s.  c  o m
    // ret.setHorizontalAlignment(SwingConstants.RIGHT);
    return ret;
}

---

From source file:MetalModExample.java

public static JComponent makeExamplePane() {
    JTextArea text = new JTextArea();
    try {//from   w  w  w. j a v a 2  s. c om
        text.read(new FileReader("MetalModExample.java"), null);
    } catch (IOException ex) {
    }

    JScrollPane scroll = new JScrollPane(text);
    return scroll;
}

---

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