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(int rows, int columns) 

Source Link

Document

Constructs a new empty TextArea with the specified number of rows and columns.

Usage

From source file:UndoDemo.java

/** Construct a GUI that demonstrates use of UndoManager */
public UndoDemo() {

    Container cp = getContentPane();
    cp.add(ta = new JTextArea(20, 60), BorderLayout.CENTER);
    JPanel bp;/*from  w w  w .  j  ava2 s .co  m*/
    cp.add(bp = new JPanel(), BorderLayout.SOUTH);

    // Create a javax.swing.undo.UndoManager; this is an amazing class that
    // keeps a Stack of UndoableEdits and lets you invoke them;
    // by registering it as a Listener on the TextComponent.Document,
    // the Document will create the UndoableEdit objects and send them
    // to the UndoManager. Between them they do ALL the work!
    um = new UndoManager();
    ta.getDocument().addUndoableEditListener(um);

    // Create the buttons
    JButton cutButton, copyButton, pasteButton, undoButton, redoButton;
    bp.add(cutButton = new JButton("Cut"));
    cutButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            ta.cut();
        }
    });

    bp.add(copyButton = new JButton("Copy"));
    copyButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            ta.copy();
        }
    });

    bp.add(pasteButton = new JButton("Paste"));
    pasteButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            ta.paste();
        }
    });
    bp.add(undoButton = new JButton("UnDo"));
    undoButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            if (um.canUndo()) {
                um.undo();
            } else {
                warn("Can't undo");
            }
        }
    });
    bp.add(redoButton = new JButton("ReDo"));
    redoButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            if (um.canRedo()) {
                um.redo();
            } else {
                warn("Can't redo");
            }
        }
    });
    pack();
    setDefaultCloseOperation(EXIT_ON_CLOSE);
}

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From source file:components.ToolBarDemo.java

public ToolBarDemo() {
    super(new BorderLayout());

    //Create the toolbar.
    JToolBar toolBar = new JToolBar("Still draggable");
    addButtons(toolBar);/*from www .j a  va2s .  co m*/

    //Create the text area used for output.  Request
    //enough space for 5 rows and 30 columns.
    textArea = new JTextArea(5, 30);
    textArea.setEditable(false);
    JScrollPane scrollPane = new JScrollPane(textArea);

    //Lay out the main panel.
    setPreferredSize(new Dimension(450, 130));
    add(toolBar, BorderLayout.PAGE_START);
    add(scrollPane, BorderLayout.CENTER);
}

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From source file:SwingFileChooserDemo.java

public SwingFileChooserDemo() {
    super(new BorderLayout());

    //Create the log first, because the action listeners
    //need to refer to it.
    log = new JTextArea(5, 20);
    log.setMargin(new Insets(5, 5, 5, 5));
    log.setEditable(false);/*  w  ww . j  a v  a  2 s.  co  m*/
    JScrollPane logScrollPane = new JScrollPane(log);

    //Create a file chooser
    fc = new JFileChooser();

    //Uncomment one of the following lines to try a different
    //file selection mode. The first allows just directories
    //to be selected (and, at least in the Java look and feel,
    //shown). The second allows both files and directories
    //to be selected. If you leave these lines commented out,
    //then the default mode (FILES_ONLY) will be used.
    //
    //fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    //fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);

    //Create the open button. We use the image from the JLF
    //Graphics Repository (but we extracted it from the jar).
    openButton = new JButton("Open a File...", createImageIcon("images/Open16.gif"));
    openButton.addActionListener(this);

    //Create the save button. We use the image from the JLF
    //Graphics Repository (but we extracted it from the jar).
    saveButton = new JButton("Save a File...", createImageIcon("images/Save16.gif"));
    saveButton.addActionListener(this);

    //For layout purposes, put the buttons in a separate panel
    JPanel buttonPanel = new JPanel(); //use FlowLayout
    buttonPanel.add(openButton);
    buttonPanel.add(saveButton);

    //Add the buttons and the log to this panel.
    add(buttonPanel, BorderLayout.PAGE_START);
    add(logScrollPane, BorderLayout.CENTER);
}

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From source file:Main.java

public Main() {
    super(new BorderLayout());
    task = new LongTask();

    //Create the demo's UI.
    startButton = new JButton("Start");
    startButton.setActionCommand("start");
    startButton.addActionListener(this);

    taskOutput = new JTextArea(5, 20);
    taskOutput.setMargin(new Insets(5, 5, 5, 5));
    taskOutput.setEditable(false);// w  ww  .j  av  a  2 s  .  c  o m

    add(startButton, BorderLayout.PAGE_START);
    add(new JScrollPane(taskOutput), BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

    //Create a timer.
    timer = new Timer(ONE_SECOND, new TimerListener());
}

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From source file:ProgressMonitorDemo.java

public ProgressMonitorDemo() {
    super(new BorderLayout());
    task = new LongTask();

    //Create the demo's UI.
    startButton = new JButton("Start");
    startButton.setActionCommand("start");
    startButton.addActionListener(this);

    taskOutput = new JTextArea(5, 20);
    taskOutput.setMargin(new Insets(5, 5, 5, 5));
    taskOutput.setEditable(false);/*from w w  w .  j  a va2 s  . c  o m*/

    add(startButton, BorderLayout.PAGE_START);
    add(new JScrollPane(taskOutput), BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

    //Create a timer.
    timer = new Timer(ONE_SECOND, new TimerListener());
}

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From source file:misc.ActionDemo.java

public ActionDemo() {
    super(new BorderLayout());

    //Create a scrolled text area.
    textArea = new JTextArea(5, 30);
    textArea.setEditable(false);/*from   ww  w . j  a v a 2 s. c  om*/
    JScrollPane scrollPane = new JScrollPane(textArea);

    //Lay out the content pane.
    setPreferredSize(new Dimension(450, 150));
    add(scrollPane, BorderLayout.CENTER);

    //Create the actions shared by the toolbar and menu.
    leftAction = new LeftAction("Go left", createNavigationIcon("Back24"), "This is the left button.",
            new Integer(KeyEvent.VK_L));
    middleAction = new MiddleAction("Do something", createNavigationIcon("Up24"), "This is the middle button.",
            new Integer(KeyEvent.VK_M));
    rightAction = new RightAction("Go right", createNavigationIcon("Forward24"), "This is the right button.",
            new Integer(KeyEvent.VK_R));
}

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From source file:ProgressBarDemo.java

public ProgressBarDemo() {
    super(new BorderLayout());
    task = new LongTask();

    //Create the demo's UI.
    startButton = new JButton("Start");
    startButton.setActionCommand("start");
    startButton.addActionListener(this);

    progressBar = new JProgressBar(0, task.getLengthOfTask());
    progressBar.setValue(0);//from www  . ja  v  a  2  s  .  c  om
    progressBar.setStringPainted(true);

    taskOutput = new JTextArea(5, 20);
    taskOutput.setMargin(new Insets(5, 5, 5, 5));
    taskOutput.setEditable(false);
    taskOutput.setCursor(null); //inherit the panel's cursor
                                //see bug 4851758

    JPanel panel = new JPanel();
    panel.add(startButton);
    panel.add(progressBar);

    add(panel, BorderLayout.PAGE_START);
    add(new JScrollPane(taskOutput), BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

    //Create a timer.
    timer = new Timer(ONE_SECOND, new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            progressBar.setValue(task.getCurrent());
            String s = task.getMessage();
            if (s != null) {
                taskOutput.append(s + newline);
                taskOutput.setCaretPosition(taskOutput.getDocument().getLength());
            }
            if (task.isDone()) {
                Toolkit.getDefaultToolkit().beep();
                timer.stop();
                startButton.setEnabled(true);
                setCursor(null); //turn off the wait cursor
                progressBar.setValue(progressBar.getMinimum());
            }
        }
    });
}

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From source file:components.ToolBarDemo2.java

public ToolBarDemo2() {
    super(new BorderLayout());

    //Create the toolbar.
    JToolBar toolBar = new JToolBar("Still draggable");
    addButtons(toolBar);// w w  w  .  j  a  v  a 2s .  c  o  m
    toolBar.setFloatable(false);
    toolBar.setRollover(true);

    //Create the text area used for output.  Request
    //enough space for 5 rows and 30 columns.
    textArea = new JTextArea(5, 30);
    textArea.setEditable(false);
    JScrollPane scrollPane = new JScrollPane(textArea);

    //Lay out the main panel.
    setPreferredSize(new Dimension(450, 130));
    add(toolBar, BorderLayout.PAGE_START);
    add(scrollPane, BorderLayout.CENTER);
}

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From source file:components.ProgressMonitorDemo.java

public ProgressMonitorDemo() {
    super(new BorderLayout());

    //Create the demo's UI.
    startButton = new JButton("Start");
    startButton.setActionCommand("start");
    startButton.addActionListener(this);

    taskOutput = new JTextArea(5, 20);
    taskOutput.setMargin(new Insets(5, 5, 5, 5));
    taskOutput.setEditable(false);/*from w  w w  .  j  a va 2  s  .c  o m*/

    add(startButton, BorderLayout.PAGE_START);
    add(new JScrollPane(taskOutput), BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

}

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From source file:CubaHSQLDBServer.java

private CubaHSQLDBServer() {
    Font monospaced = Font.decode("monospaced");

    statusArea = new JTextArea(2, 80);
    statusArea.setFont(monospaced);//from  w  w  w  .  jav  a2  s .c o m
    statusArea.setMargin(new Insets(5, 5, 5, 5));
    exceptionArea = new JTextArea(26, 80);
    exceptionArea.setFont(monospaced);
    exceptionArea.setMargin(new Insets(5, 5, 5, 5));
    JPanel exceptionWrapperContainer = new JPanel();
    exceptionWrapperContainer.setLayout(new BorderLayout(0, 0));
    exceptionWrapperContainer.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
    exceptionWrapperContainer.add(exceptionArea);
    JPanel statusWrapperContainer = new JPanel();
    statusWrapperContainer.setLayout(new BorderLayout(0, 0));
    statusWrapperContainer.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
    statusWrapperContainer.add(statusArea);
    addCopyPopup(statusArea);
    addCopyPopup(exceptionArea);

    exceptionBox = new JPanel();
    LayoutBuilder.create(exceptionBox, BoxLayout.Y_AXIS).addSpace(5).addComponent(exceptionWrapperContainer);

    LayoutBuilder.create(this.getContentPane(), BoxLayout.X_AXIS).addSpace(5).addContainer(BoxLayout.Y_AXIS)
            .addSpace(5).addComponent(statusWrapperContainer).addComponent(exceptionBox).addSpace(5)
            .returnToParent().addSpace(5);

    statusArea.setEditable(false);
    exceptionArea.setEditable(false);
    exceptionBox.setVisible(false);
    exceptionArea.setBackground(new Color(255, 255, 212));
    this.pack();
    this.setResizable(true);
    this.setTitle("HSQLDB Server");

    try {
        this.setIconImage(ImageIO.read(getClass().getResourceAsStream("/icons/database.png")));
    } catch (IOException e) {
        throw new IllegalStateException("Unable to find icon for HSQLDB window");
    }
}

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