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:MainClass.java

public static void main(String[] args) {
    JTextArea ta = new JTextArea();
    ta.setLineWrap(true);//from ww w. java  2  s .c  om
    ta.setWrapStyleWord(true);
    JScrollPane scroll = new JScrollPane(ta);

    ta.append("www.\n");
    ta.append("java2s\n");
    ta.append(".com");

    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 += 1;
        }
    } catch (BadLocationException ex) {
        System.out.println(ex);
    }

    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);
}

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From source file:UpcaseFilter.java

public static void main(String[] args) {
    DocumentFilter dfilter = new UpcaseFilter();

    JTextArea jta = new JTextArea();
    JTextField jtf = new JTextField();
    ((AbstractDocument) jta.getDocument()).setDocumentFilter(dfilter);
    ((AbstractDocument) jtf.getDocument()).setDocumentFilter(dfilter);

    JFrame frame = new JFrame("UpcaseFilter");
    frame.getContentPane().add(jta, java.awt.BorderLayout.CENTER);
    frame.getContentPane().add(jtf, java.awt.BorderLayout.SOUTH);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 120);//from www.j  a  v a2 s . co m
    frame.setVisible(true);
}

---

From source file:UpcaseFilter.java

public static void main(String[] args) {
    DocumentFilter dfilter = new UpcaseFilter();

    JTextArea jta = new JTextArea();
    JTextField jtf = new JTextField();
    ((AbstractDocument) jta.getDocument()).setDocumentFilter(dfilter);
    ((AbstractDocument) jtf.getDocument()).setDocumentFilter(dfilter);

    JFrame frame = new JFrame("UpcaseFilter");
    frame.getContentPane().add(jta, "Center");
    frame.getContentPane().add(jtf, "South");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 120);/*from  w  w w .ja v a2 s.com*/
    frame.setVisible(true);
}

---

From source file:ToolBarSample.java

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

    JToolBar toolbar = new JToolBar();
    toolbar.setRollover(true);/*from  ww w .  ja v  a2  s  .c  o  m*/

    JButton button = new JButton("button");
    toolbar.add(button);
    toolbar.addSeparator();

    toolbar.add(new JButton("button 2"));

    toolbar.add(new JComboBox(new String[] { "A", "B", "C" }));

    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);
}

---

From source file:UTest.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Debugging Drop Zone");
    frame.setSize(500, 300);//from  w  w w .  j a v  a  2s.  c  o  m
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTextArea jta = new JTextArea();
    frame.getContentPane().add(new JScrollPane(jta));
    UberHandler uh = new UberHandler();
    uh.setOutput(jta);
    jta.setTransferHandler(uh);

    frame.setVisible(true);
}

---

From source file:SelectingComboSample.java

public static void main(String args[]) {
    String labels[] = { "A", "B", "C", "D", "E", "F", "G", "H", "J", "I" };
    JFrame frame = new JFrame("Selecting JComboBox");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame.getContentPane();

    JComboBox comboBox = new JComboBox(labels);
    contentPane.add(comboBox, BorderLayout.SOUTH);

    final JTextArea textArea = new JTextArea();
    textArea.setEditable(false);/*from www. j  a va  2  s .c  o m*/
    JScrollPane sp = new JScrollPane(textArea);
    contentPane.add(sp, BorderLayout.CENTER);

    ItemListener itemListener = new ItemListener() {
        public void itemStateChanged(ItemEvent itemEvent) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            int state = itemEvent.getStateChange();
            String stateString = ((state == ItemEvent.SELECTED) ? "Selected" : "Deselected");
            pw.print("Item: " + itemEvent.getItem());
            pw.print(", State: " + stateString);
            ItemSelectable is = itemEvent.getItemSelectable();
            pw.print(", Selected: " + selectedString(is));
            pw.println();
            textArea.append(sw.toString());
        }
    };
    comboBox.addItemListener(itemListener);

    ActionListener actionListener = new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            pw.print("Command: " + actionEvent.getActionCommand());
            ItemSelectable is = (ItemSelectable) actionEvent.getSource();
            pw.print(", Selected: " + selectedString(is));
            pw.println();
            textArea.append(sw.toString());
        }
    };
    comboBox.addActionListener(actionListener);

    frame.setSize(400, 200);
    frame.setVisible(true);
}

---

From source file:BorderLayoutExample.java

public static void main(String[] args) {
    JFrame f = new JFrame();
    JMenuBar menubar = new JMenuBar();
    JMenu file = new JMenu("File");

    menubar.add(file);//  ww  w  .ja  v  a 2  s.  c o m
    f.setJMenuBar(menubar);

    JToolBar toolbar = new JToolBar();
    toolbar.setFloatable(false);

    JButton bexit = new JButton(new ImageIcon("exit.png"));
    bexit.setBorder(new EmptyBorder(0, 0, 0, 0));
    toolbar.add(bexit);

    f.add(toolbar, BorderLayout.NORTH);

    JToolBar vertical = new JToolBar(JToolBar.VERTICAL);
    vertical.setFloatable(false);
    vertical.setMargin(new Insets(10, 5, 5, 5));

    JButton selectb = new JButton(new ImageIcon("a.png"));
    selectb.setBorder(new EmptyBorder(3, 0, 3, 0));

    JButton freehandb = new JButton(new ImageIcon("b.png"));
    freehandb.setBorder(new EmptyBorder(3, 0, 3, 0));
    JButton shapeedb = new JButton(new ImageIcon("c.png"));
    shapeedb.setBorder(new EmptyBorder(3, 0, 3, 0));

    vertical.add(selectb);
    vertical.add(freehandb);
    vertical.add(shapeedb);

    f.add(vertical, BorderLayout.WEST);
    f.add(new JTextArea(), BorderLayout.CENTER);

    JLabel statusbar = new JLabel(" Statusbar");
    statusbar.setPreferredSize(new Dimension(-1, 22));
    statusbar.setBorder(LineBorder.createGrayLineBorder());
    f.add(statusbar, BorderLayout.SOUTH);
    f.setSize(350, 300);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
}

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From source file:ModifyModelSample.java

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

    // Fill model
    final DefaultListModel model = new DefaultListModel();
    for (int i = 0, n = labels.length; i < n; i++) {
        model.addElement(labels[i]);//w w  w.  j a  va 2 s  .c o m
    }
    JList jlist = new JList(model);
    JScrollPane scrollPane1 = new JScrollPane(jlist);
    contentPane.add(scrollPane1, BorderLayout.WEST);

    final JTextArea textArea = new JTextArea();
    textArea.setEditable(false);
    JScrollPane scrollPane2 = new JScrollPane(textArea);
    contentPane.add(scrollPane2, BorderLayout.CENTER);

    ListDataListener listDataListener = new ListDataListener() {
        public void contentsChanged(ListDataEvent listDataEvent) {
            appendEvent(listDataEvent);
        }

        public void intervalAdded(ListDataEvent listDataEvent) {
            appendEvent(listDataEvent);
        }

        public void intervalRemoved(ListDataEvent listDataEvent) {
            appendEvent(listDataEvent);
        }

        private void appendEvent(ListDataEvent listDataEvent) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            switch (listDataEvent.getType()) {
            case ListDataEvent.CONTENTS_CHANGED:
                pw.print("Type: Contents Changed");
                break;
            case ListDataEvent.INTERVAL_ADDED:
                pw.print("Type: Interval Added");
                break;
            case ListDataEvent.INTERVAL_REMOVED:
                pw.print("Type: Interval Removed");
                break;
            }
            pw.print(", Index0: " + listDataEvent.getIndex0());
            pw.print(", Index1: " + listDataEvent.getIndex1());
            DefaultListModel theModel = (DefaultListModel) listDataEvent.getSource();
            Enumeration elements = theModel.elements();
            pw.print(", Elements: ");
            while (elements.hasMoreElements()) {
                pw.print(elements.nextElement());
                pw.print(",");
            }
            pw.println();
            textArea.append(sw.toString());
        }
    };

    model.addListDataListener(listDataListener);

    // Setup buttons
    JPanel jp = new JPanel(new GridLayout(2, 1));
    JPanel jp1 = new JPanel(new FlowLayout(FlowLayout.CENTER, 1, 1));
    JPanel jp2 = new JPanel(new FlowLayout(FlowLayout.CENTER, 1, 1));
    jp.add(jp1);
    jp.add(jp2);
    JButton jb = new JButton("add F");
    jp1.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            model.add(0, "First");
        }
    });
    jb = new JButton("addElement L");
    jp1.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            model.addElement("Last");
        }
    });
    jb = new JButton("insertElementAt M");
    jp1.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            int size = model.getSize();
            model.insertElementAt("Middle", size / 2);
        }
    });
    jb = new JButton("set F");
    jp1.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            int size = model.getSize();
            if (size != 0)
                model.set(0, "New First");
        }
    });
    jb = new JButton("setElementAt L");
    jp1.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            int size = model.getSize();
            if (size != 0)
                model.setElementAt("New Last", size - 1);
        }
    });
    jb = new JButton("load 10");
    jp1.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            for (int i = 0, n = labels.length; i < n; i++) {
                model.addElement(labels[i]);
            }
        }
    });
    jb = new JButton("clear");
    jp2.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            model.clear();
        }
    });
    jb = new JButton("remove F");
    jp2.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            int size = model.getSize();
            if (size != 0)
                model.remove(0);
        }
    });
    jb = new JButton("removeAllElements");
    jp2.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            model.removeAllElements();
        }
    });
    jb = new JButton("removeElement 'Last'");
    jp2.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            model.removeElement("Last");
        }
    });
    jb = new JButton("removeElementAt M");
    jp2.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            int size = model.getSize();
            if (size != 0)
                model.removeElementAt(size / 2);
        }
    });
    jb = new JButton("removeRange FM");
    jp2.add(jb);
    jb.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            int size = model.getSize();
            if (size != 0)
                model.removeRange(0, size / 2);
        }
    });
    contentPane.add(jp, BorderLayout.SOUTH);
    frame.setSize(640, 300);
    frame.setVisible(true);
}

---

From source file:MainClass.java

public static void main(String[] a) {
    final int STRING_POSITION = 1;
    Object buttonColors[][] = { { Color.RED, "RED" }, { Color.BLUE, "BLUE" }, { Color.GREEN, "GREEN" },
            { Color.BLACK, "BLACK" }, null, // separator
            { Color.CYAN, "CYAN" } };

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new TheActionListener();

    JToolBar toolbar = new JToolBar();
    toolbar.setRollover(true);//from   ww  w.java  2  s . c o m

    for (Object[] color : buttonColors) {
        if (color == null) {
            toolbar.addSeparator();
        } else {
            Icon icon = MetalIconFactory.getTreeComputerIcon();
            JButton button = new JButton(icon);
            button.setActionCommand((String) color[STRING_POSITION]);
            button.addActionListener(actionListener);
            toolbar.add(button);
        }
    }

    Action action = new ShowAction(toolbar);
    JButton button = new JButton(action);
    toolbar.add(button);

    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:ScrollPaneWatermark.java

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

    JTextArea ta = new JTextArea();
    for (int i = 0; i < 1000; i++) {
        ta.append(Integer.toString(i) + "  ");
    }/*from  w w w. j  a va 2 s.  c  o m*/

    ta.setLineWrap(true);
    ta.setWrapStyleWord(true);
    // ta.setOpaque(false);

    ScrollPaneWatermark watermark = new ScrollPaneWatermark();
    watermark.setBackgroundTexture(new File("background.jpg").toURL());
    watermark.setForegroundBadge(new File("foreground.png").toURL());
    watermark.setView(ta);

    JScrollPane scroll = new JScrollPane();
    scroll.setViewport(watermark);

    frame.getContentPane().add(scroll);
    frame.pack();
    frame.setSize(600, 600);
    frame.setVisible(true);
}

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