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:Main.java

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

    JTextArea textArea = new JTextArea();
    f.add(new JScrollPane(textArea), BorderLayout.CENTER);

    Timer timer = new Timer(1000, new ActionListener() {
        @Override/*  ww w.j  a va 2  s  .  com*/
        public void actionPerformed(ActionEvent e) {
            textArea.append("bla");
        }
    });
    timer.setRepeats(true);
    timer.start();
    JButton button = new JButton("Click me");
    button.addActionListener(e -> {
        System.out.println("Before option pane");
        JOptionPane.showMessageDialog(f, "A message dialog");
        System.out.println("After option pane");
    });
    f.add(button, BorderLayout.SOUTH);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.pack();
    f.setVisible(true);
}

From source file:Main.java

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

    JTextArea textArea = new JTextArea();
    JScrollPane scrollPane = new JScrollPane(textArea);
    frame.add(scrollPane, BorderLayout.CENTER);

    NavigationFilter filter = new NavigationFilter() {
        public void setDot(NavigationFilter.FilterBypass fb, int dot, Position.Bias bias) {
            System.out.println("Setting: " + dot);
            fb.setDot(dot, bias);//w ww .j av a2s  . c  o m

        }

        public void moveDot(NavigationFilter.FilterBypass fb, int dot, Position.Bias bias) {
            System.out.println("Moving: " + dot);
            fb.setDot(dot, bias);
        }
    };

    textArea.setNavigationFilter(filter);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

From source file:MainClass.java

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

    JTextArea textArea = new JTextArea();
    JScrollPane scrollPane = new JScrollPane(textArea);
    frame.add(scrollPane, BorderLayout.CENTER);

    CaretListener listener = new CaretListener() {
        public void caretUpdate(CaretEvent caretEvent) {
            System.out.println("dot:" + caretEvent.getDot());
            System.out.println("mark" + caretEvent.getMark());
        }//  w  w  w.j  a v  a2s.co  m
    };

    textArea.addCaretListener(listener);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

From source file:MainClass.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Sharing Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = frame.getContentPane();
    JTextArea textarea1 = new JTextArea();
    Document document = textarea1.getDocument();
    JTextArea textarea2 = new JTextArea(document);
    JTextArea textarea3 = new JTextArea(document);
    content.setLayout(new BoxLayout(content, BoxLayout.Y_AXIS));
    content.add(new JScrollPane(textarea1));
    content.add(new JScrollPane(textarea2));
    content.add(new JScrollPane(textarea3));
    frame.setSize(300, 400);/*  ww w.  j  ava 2s.co m*/
    frame.setVisible(true);
}

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();
    contentPane.setLayout(new GridLayout(1, 2, 2, 2));

    JTextArea tArea1 = new JTextArea();
    tArea1.setLineWrap(true);//from  w  w w  .j  a v a2  s.  co  m
    JTextArea tArea2 = new JTextArea();
    tArea2.setLineWrap(true);
    tArea1.setText("I got a long long line of text in my JTextArea");
    tArea2.setText("I got a long long line of text in my JTextArea");

    JScrollPane scroller1 = new JScrollPane();
    JScrollPane scroller2 = new JScrollPane();
    scroller1.setViewportView(tArea1);
    scroller2.setViewportView(tArea2);

    contentPane.add(scroller1);
    contentPane.add(scroller2);

    frame.setContentPane(contentPane);
    frame.setSize(100, 100);
    frame.setLocationByPlatform(true);
    frame.setVisible(true);

}

From source file:Main.java

public static void main(String args[]) {
    String title = (args.length == 0 ? "TextArea Example" : args[0]);
    JFrame frame = new JFrame(title);
    Container content = frame.getContentPane();

    content.setLayout(new GridLayout(0, 2));

    JTextArea leftTextArea = new JTextArea();
    content.add(leftTextArea);/*www.  j  a  va 2 s.com*/
    leftTextArea.paste();

    JTextArea rightTextArea = new JTextArea() {
        public boolean isManagingFocus() {
            return false;
        }
    };
    rightTextArea.paste();

    JScrollPane rightPane = new JScrollPane(rightTextArea);
    content.add(rightPane);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

From source file:OffsetTest.java

public static void main(String[] args) {
    JTextArea ta = new JTextArea();
    ta.setLineWrap(true);//  w w  w. j ava2s.com
    ta.setWrapStyleWord(true);
    JScrollPane scroll = new JScrollPane(ta);

    // Add three lines of text to the JTextArea.
    ta.append("The first line.\n");
    ta.append("Line Two!\n");
    ta.append("This is the 3rd line of this document.");

    // Print some results . . .
    try {
        for (int n = 0; n < ta.getLineCount(); n += 1)
            System.out.println("line " + n + " starts at " + ta.getLineStartOffset(n) + ", ends at "
                    + ta.getLineEndOffset(n));
        System.out.println();

        int n = 0;
        while (true) {
            System.out.print("offset " + n + " is on ");
            System.out.println("line " + ta.getLineOfOffset(n));
            n += 13;
        }
    } catch (BadLocationException ex) {
        System.out.println(ex);
    }

    // Layout . . .
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(scroll, java.awt.BorderLayout.CENTER);
    f.setSize(150, 150);
    f.setVisible(true);
}

From source file:Main.java

public static void main(String args[]) {
    JFrame frame = new JFrame();
    Container contentPane = frame.getContentPane();
    JTextArea b = new JTextArea();
    b.setPreferredSize(new Dimension(600, 600));
    JScrollPane pane = new JScrollPane(b);
    AdjustmentListener hListener = new AdjustmentListener() {
        public void adjustmentValueChanged(AdjustmentEvent e) {
            System.out.println("Horizontal: ");
            dumpInfo(e);//w w  w .  j  a v a  2s.  c o  m
        }
    };
    JScrollBar hBar = pane.getHorizontalScrollBar();
    hBar.addAdjustmentListener(hListener);
    AdjustmentListener vListener = new AdjustmentListener() {
        public void adjustmentValueChanged(AdjustmentEvent e) {
            System.out.println("Vertical: ");
            dumpInfo(e);
        }
    };
    JScrollBar vBar = pane.getVerticalScrollBar();
    vBar.addAdjustmentListener(vListener);
    contentPane.add(pane, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.setVisible(true);
}

From source file:ListenerSample.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Offset Example");
    Container content = frame.getContentPane();
    JTextArea textArea = new JTextArea();
    JScrollPane scrollPane = new JScrollPane(textArea);
    final Document document = textArea.getDocument();
    document.addDocumentListener(new MyListener());

    content.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(250, 150);/*  ww  w  . ja  va2s  .c  o  m*/
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] argv) {
    JTextComponent textcomp = new JTextArea();
    final UndoManager undo = new UndoManager();
    Document doc = textcomp.getDocument();

    doc.addUndoableEditListener(new UndoableEditListener() {
        public void undoableEditHappened(UndoableEditEvent evt) {
            undo.addEdit(evt.getEdit());
        }//from w w w. ja va  2s.co m
    });

    textcomp.getActionMap().put("Undo", new AbstractAction("Undo") {
        public void actionPerformed(ActionEvent evt) {
            try {
                if (undo.canUndo()) {
                    undo.undo();
                }
            } catch (CannotUndoException e) {
            }
        }
    });

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(new JScrollPane(textcomp));
    frame.setSize(380, 320);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
}