Java refresh/update JTextPane

Question

I have my JTextPane text reading from an xml file, now I have updated my xml file how do I make the JTextPane refresh/update with that content?
Thanks in advance,
Dennis

Answer 1

It's a bit long
Actually it's not that it isn't working, it is I don;t know the best way to do it.
package trunk.textConversation;
import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;              //for layout managers and more
import java.awt.event.*;        //for action events
public class Textconversation extends JPanel implements ActionListener {
     //The name of the user
     public static String name = "Guest";
     //The message of the user
     public static String message;
     //The text to output
     public static String[] initString;
     //The style the text will be in
     public static String[] initStyles = {"regular"};
     public static JFrame frame;
     private static final long serialVersionUID = 1L;
     //private String newline = "\n";
    protected static final String textFieldString = "JTextField";
    protected static final String buttonString = "JButton";
    protected JLabel actionLabel;
    public Textconversation() {
        setLayout(new BorderLayout());
        //Create a regular text field.
        JTextField textField = new JTextField(10);
        textField.setActionCommand(textFieldString);
        textField.addActionListener(this);
        //Create some labels for the fields.
        JLabel textFieldLabel = new JLabel();
        textFieldLabel.setLabelFor(textField);
        //Create a label to put messages during an action event.
        actionLabel = new JLabel("Type text in a field and press Enter.");
        actionLabel.setBorder(BorderFactory.createEmptyBorder(10,0,0,0));
        //Lay out the text controls and the labels.
        JPanel textControlsPane = new JPanel();
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        textControlsPane.setLayout(gridbag);
        JLabel[] labels = {textFieldLabel};
        JTextField[] textFields = {textField};
        addLabelTextRows(labels, textFields, gridbag, textControlsPane);
        c.gridwidth = GridBagConstraints.REMAINDER; //last
        c.anchor = GridBagConstraints.WEST;
        c.weightx = 1.0;
        textControlsPane.add(actionLabel, c);
        textControlsPane.setBorder(
                BorderFactory.createCompoundBorder(
                                BorderFactory.createTitledBorder("Text Fields"),
                                BorderFactory.createEmptyBorder(5,5,5,5)));
        //Create a text pane.
        JTextPane textPane = createTextPane();
        JScrollPane paneScrollPane = new JScrollPane(textPane);
        paneScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        paneScrollPane.setPreferredSize(new Dimension(250, 155));
        paneScrollPane.setMinimumSize(new Dimension(10, 10));
        //Put the editor pane and the text pane in a split pane.
        JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
                                              paneScrollPane,
                                              textControlsPane);
        splitPane.setOneTouchExpandable(true);
        splitPane.setResizeWeight(0.5);
        JPanel rightPane = new JPanel(new GridLayout(1,0));
        rightPane.add(splitPane);
        rightPane.setBorder(BorderFactory.createCompoundBorder(
                        BorderFactory.createTitledBorder("Styled Text"),
                        BorderFactory.createEmptyBorder(5,5,5,5)));
        //Put everything together.
        JPanel leftPane = new JPanel(new BorderLayout());
        add(leftPane, BorderLayout.LINE_START);
        add(rightPane, BorderLayout.LINE_END);
    private void addLabelTextRows(JLabel[] labels, JTextField[] textFields, GridBagLayout gridbag, Container container) {
        GridBagConstraints c = new GridBagConstraints();
        c.anchor = GridBagConstraints.EAST;
        int numLabels = labels.length;
        for (int i = 0; i < numLabels; i++) {
            c.gridwidth = GridBagConstraints.RELATIVE; //next-to-last
            c.fill = GridBagConstraints.NONE;      //reset to default
            c.weightx = 0.0;                       //reset to default
            container.add(labels, c);
c.gridwidth = GridBagConstraints.REMAINDER; //end row
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 1.0;
container.add(textFields[i], c);
public static void textOutput() {
     Xmlreader.readElement();
     initString = new String[Xmlreader.conversation.length];
     for (int s = 0; s < Xmlreader.conversation.length; s++) {
          initString[s] = Xmlreader.conversation[s] + "\n";
public void actionPerformed(ActionEvent e) {
     //After user clicked enter
String prefix = "You typed \"";
if (textFieldString.equals(e.getActionCommand())) {
JTextField source = (JTextField)e.getSource();
actionLabel.setText(prefix + source.getText() + "\"");
message = source.getText();
Xmlreader.addElement();
} else if (buttonString.equals(e.getActionCommand())) {
Toolkit.getDefaultToolkit().beep();
public JTextPane createTextPane() {
     textOutput();
JTextPane textPane = new JTextPane();
textPane.setEditable(false);
StyledDocument doc = textPane.getStyledDocument();
addStylesToDocument(doc);
try {
               for (int i=0; i < initString.length; i++) {
doc.insertString(doc.getLength(), initString[i],
doc.getStyle(initStyles[0]));
} catch (BadLocationException ble) {
System.err.println("Couldn't insert initial text into text pane.");
return textPane;
protected void addStylesToDocument(StyledDocument doc) {
//Initialize some styles.
Style def = StyleContext.getDefaultStyleContext().
getStyle(StyleContext.DEFAULT_STYLE);
Style regular = doc.addStyle("regular", def);
StyleConstants.setFontFamily(def, "SansSerif");
Style s = doc.addStyle("italic", regular);
StyleConstants.setItalic(s, true);
s = doc.addStyle("bold", regular);
StyleConstants.setBold(s, true);
s = doc.addStyle("small", regular);
StyleConstants.setFontSize(s, 10);
s = doc.addStyle("large", regular);
StyleConstants.setFontSize(s, 16);
s = doc.addStyle("icon", regular);
StyleConstants.setAlignment(s, StyleConstants.ALIGN_CENTER);
ImageIcon pigIcon = createImageIcon("", "");
if (pigIcon != null) {
StyleConstants.setIcon(s, pigIcon);
s = doc.addStyle("button", regular);
StyleConstants.setAlignment(s, StyleConstants.ALIGN_CENTER);
ImageIcon soundIcon = createImageIcon("", "");
JButton button = new JButton();
if (soundIcon != null) {
button.setIcon(soundIcon);
} else {
button.setText("BEEP");
button.setCursor(Cursor.getDefaultCursor());
button.setMargin(new Insets(0,0,0,0));
button.setActionCommand(buttonString);
button.addActionListener(this);
StyleConstants.setComponent(s, button);
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path,
String description) {
java.net.URL imgURL = Textconversation.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event dispatch thread.
private static void createAndShowGUI() {
//Create and set up the window.
frame = new JFrame("Conversation");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add content to the window.
frame.add(new Textconversation());
//Display the window.
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
//Schedule a job for the event dispatching thread:
//creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Turn off metal's use of bold fonts
                    UIManager.put("swing.boldMetal", Boolean.FALSE);
                    createAndShowGUI();
Message was edited by:
Dennis56