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:Main.java

public static void main(String[] args) {
    JFrame f = new JFrame();
    JTextArea ta = new JTextArea(5, 32);
    ta.setText("That's one small step for man...\nOne giant leap for mankind.");

    ta.setSelectionStart(10);/*w w  w  . ja v  a2 s  .c  o m*/

    ta.setSelectionEnd(20);

    f.getContentPane().add(ta);
    f.setSize(100, 100);
    f.setVisible(true);

}

From source file:Main.java

public static void main(String args[]) {
    JTextArea area = new JTextArea(5, 20);
    area.setText("this is a test.");
    String charsToHighlight = "aeiouAEIOU";
    Highlighter h = area.getHighlighter();
    h.removeAllHighlights();/*ww w  .j a  va  2 s  . c  o m*/
    String text = area.getText().toUpperCase();
    for (int i = 0; i < text.length(); i += 1) {
        char ch = text.charAt(i);
        if (charsToHighlight.indexOf(ch) >= 0)
            try {
                h.addHighlight(i, i + 1, DefaultHighlighter.DefaultPainter);
            } catch (Exception ble) {
            }
    }
}

From source file:Main.java

public static void main(String[] args) {
    JFrame f = new JFrame();
    JTextArea ta = new JTextArea(5, 32);
    ta.setText("That's one small step for man...\nOne giant leap for mankind.");
    ta.setLineWrap(true);//from  w w  w .  j a  v a  2s. com
    ta.setWrapStyleWord(true);

    f.getContentPane().add(ta);
    f.setSize(100, 100);
    f.setVisible(true);

}

From source file:Main.java

public static void main(String[] args) {
    JFrame f = new JFrame();
    JTextArea ta = new JTextArea(5, 32);
    ta.setText("That's one small step for man...\nOne giant leap for mankind.");
    ta.setLineWrap(true);//from  ww w  .ja  va 2 s  .c  o m
    ta.setWrapStyleWord(true);

    f.getContentPane().add(ta);
    f.setSize(100, 100);
    f.setVisible(true);

    ((AbstractDocument) ta.getDocument()).dump(System.out);
}

From source file:Main.java

public static void main(String[] args) {
    JTextArea textArea = new JTextArea(5, 30);
    textArea.setOpaque(false);/*from  ww  w  .jav a  2  s  .c om*/

    JViewport viewport = new JViewport() {
        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            int w = this.getWidth();
            int h = this.getHeight();
            g.setColor(Color.RED);
            g.fillRect(0, 0, w / 2, h / 2);
        }
    };

    JScrollPane scrollPane = new JScrollPane();
    scrollPane.setViewport(viewport);
    scrollPane.setViewportView(textArea);

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(scrollPane);
    frame.setLocationByPlatform(true);
    frame.pack();
    frame.setVisible(true);
}

From source file:KeymapExample.java

public static void main(String[] args) {
    JTextArea area = new JTextArea(6, 32);
    Keymap parent = area.getKeymap();
    Keymap newmap = JTextComponent.addKeymap("KeymapExampleMap", parent);

    KeyStroke u = KeyStroke.getKeyStroke(KeyEvent.VK_U, InputEvent.CTRL_MASK);
    Action actionU = new UpWord();
    newmap.addActionForKeyStroke(u, actionU);

    Action actionList[] = area.getActions();
    Hashtable lookup = new Hashtable();
    for (int j = 0; j < actionList.length; j += 1)
        lookup.put(actionList[j].getValue(Action.NAME), actionList[j]);

    KeyStroke L = KeyStroke.getKeyStroke(KeyEvent.VK_L, InputEvent.CTRL_MASK);
    Action actionL = (Action) lookup.get(DefaultEditorKit.selectLineAction);
    newmap.addActionForKeyStroke(L, actionL);

    KeyStroke W = KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK);
    Action actionW = (Action) lookup.get(DefaultEditorKit.selectWordAction);
    newmap.addActionForKeyStroke(W, actionW);

    area.setKeymap(newmap);/* w  w  w. j  av  a  2  s.c o m*/

    JFrame f = new JFrame("KeymapExample");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
    area.setText("www.\n java2s \n .com.");
    f.pack();
    f.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JFrame window = new JFrame();
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setResizable(false);/*from www  .j av a2s. c  om*/
    JTextArea textArea = new JTextArea(25, 30);

    JScrollPane textScroll = new JScrollPane(textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
            JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

    window.add(textScroll);
    window.pack();
    window.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JTextArea ta = new JTextArea(20, 20);
    ((AbstractDocument) ta.getDocument()).setDocumentFilter(new MyFilter());

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLayout(new BorderLayout());
    frame.add(new JScrollPane(ta));
    frame.pack();/*from  ww  w. ja  v  a2 s . c o  m*/
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    JFrame frame = new JFrame("MultiHighlight");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTextArea comp = new JTextArea(5, 20);
    comp.setText("this is a test");
    frame.getContentPane().add(new JScrollPane(comp), BorderLayout.CENTER);

    String charsToHighlight = "a";
    Highlighter h = comp.getHighlighter();
    h.removeAllHighlights();/* www  .  j a va2  s.  c  o m*/
    String text = comp.getText().toUpperCase();

    for (int j = 0; j < text.length(); j += 1) {
        char ch = text.charAt(j);
        if (charsToHighlight.indexOf(ch) >= 0)
            h.addHighlight(j, j + 1, DefaultHighlighter.DefaultPainter);
    }
    frame.pack();
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JTextArea textArea = new JTextArea(10, 30);
    AbstractDocument doc = (AbstractDocument) textArea.getDocument();
    doc.setDocumentFilter(new EndOfLineFilter());

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(new JScrollPane(textArea));
    frame.pack();//from   w ww .jav  a  2s.c  om
    frame.setVisible(true);
}