How do I change fonts in a Text field ??

Question

Okay I've tried to implement a JComboBox that allows the user to change fonts in the text field. So far I've tried different methods to do it but to no avail. Could somebodoy here read the programs source code for me and tell me where I went wrong?
/* * My GUI Client */
import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
import javax.swing.event.*;
//for HTML Headers
import javax.swing.text.StyledEditorKit.*;
import javax.swing.text.html.HTMLEditorKit.*;
import javax.swing.text.html.*;
import javax.swing.event.HyperlinkListener;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkEvent.EventType;
import javax.swing.text.html.HTMLFrameHyperlinkEvent;
//for layout managers
import java.awt.event.*;
//for action and window events
import java.io.*;
import java.net.*;
import java.awt.GraphicsEnvironment;
//for font settings
import java.lang.Integer;
import java.util.Vector;
import java.awt.font.*;
import java.awt.geom.*;
public class guiClient extends JFrame implements ActionListener {
protected static final String textFieldString = "JTextField";
protected static final String loadgraphicString = "LoadGraphic";
protected static final String connectString = "Connect";
static JEditorPane editorPane;
static JPanel layoutPanel = new JPanel(new BorderLayout());
static JPanel controlPanel = new JPanel(new BorderLayout());
static JPanel buttonPanel = new JPanel(new BorderLayout());
static JPanel fontPanel = new JPanel(new BorderLayout());
static PrintStream out;
static DrawPanel dPanel;
static DrawPanel dPButton;
static DrawPanel dFonts;
static DrawControls dControls;
static DrawButtons dButtons;
static String userString;
static String currentFont;
String fontchoice;
String fontlist;
static JTextField userName = new JTextField();
public static JMenuBar menuBar;
private static JButton connectbutton = new JButton("Connect");
static boolean CONNECTFLAG = false;
//create the gui interface
public guiClient() {
     super("My Client");
// Create a ComboBox
GraphicsEnvironment gEnv = GraphicsEnvironment.getLocalGraphicsEnvironment();
String envfonts[] = gEnv.getAvailableFontFamilyNames();
Vector vector = new Vector();
for ( int i = 1; i < envfonts.length; i++ ) {
vector.addElement(envfonts);
JComboBox fontlist = new JComboBox (envfonts);
     fontlist.setSelectedIndex(0);
     fontlist.setEditable(true);
     fontlist.addActionListener(this);
     fontchoice = envfonts[0];     
//Create a regular text field.
     JTextField textField = new JTextField(10);
     textField.setActionCommand(textFieldString);
     textField.addActionListener(this);          
//Create an editor pane.
editorPane = new JEditorPane();
     editorPane.setContentType("text");
     editorPane.setEditable(false);
//set up HTML editor kit
     HTMLDocument m_doc = new HTMLDocument();
     editorPane.setDocument(m_doc);
     HTMLEditorKit hkit = new HTMLEditorKit();
     editorPane.setEditorKit( hkit );
     editorPane.addHyperlinkListener( new HyperListener());
//Create whiteboard
dPanel = new DrawPanel();
dPButton = new DrawPanel();
dFonts = new DrawPanel();
dControls = new DrawControls(dPanel);
dButtons = new DrawButtons(dPButton);
     //JLable fontLab = new JLabel(fontLable);
//fontLab.setText("Fonts");
//Font newFont = getFont().deriveFont(1);
//fontLab.setFont(newFont);
//fontLab.setHorizontalAlignment(JLabel.CENTER);
JPanel whiteboard = new JPanel();
whiteboard.setLayout(new BorderLayout());
whiteboard.setPreferredSize(new Dimension(300,300));
whiteboard.add("Center",dPanel);
whiteboard.add("South",dControls);
whiteboard.add("North",dButtons);
     JScrollPane editorScrollPane = new JScrollPane(editorPane);
     editorScrollPane.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
     editorScrollPane.setPreferredSize(new Dimension(250, 145));
     editorScrollPane.setMinimumSize(new Dimension(50, 50));
//put everything in a panel
     JPanel contentPane = new JPanel();
     JPanel fontPane = new JPanel();
     contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS));
//add whiteboard
     contentPane.add(whiteboard);
//add editor box
     contentPane.add(editorScrollPane);
//add spacer
     contentPane.add(Box.createRigidArea(new Dimension(0,5)));
//add textfield
     contentPane.add(textField);
//set up layout pane
     //layoutPanel.add(GridLayout(2,1),fontLab);
     layoutPanel.add( BorderLayout.NORTH, fontlist);     
     layoutPanel.add(BorderLayout.WEST,new Label("Name: ")); //add a label
     layoutPanel.add(BorderLayout.CENTER, userName ); //add textfield for user names
     layoutPanel.add(BorderLayout.SOUTH, connectbutton);//add dropdown box for fonts
     //fontPane.add(BorderLayout.NORTH,fontlist);
     contentPane.add(layoutPanel);
     contentPane.add(controlPanel);
     contentPane.add(buttonPanel);
//Create the menu bar.
menuBar = new JMenuBar();
setJMenuBar(menuBar);
//Build the first menu.
     JMenu menu = new JMenu("File");
     menu.setMnemonic(KeyEvent.VK_F);
     menuBar.add(menu);
//a group of JMenuItems
     JMenuItem menuItem = new JMenuItem("Load Graphic", KeyEvent.VK_L);
     menu.add(menuItem);
menuItem.setActionCommand(loadgraphicString);
     menuItem.addActionListener(this);
connectbutton.setActionCommand(connectString);
connectbutton.addActionListener(this);
     setContentPane(contentPane);
static private void insertTheHTML(JEditorPane editor, String html, int location) throws IOException {
     HTMLEditorKit kit = (HTMLEditorKit) editor.getEditorKit();
     Document doc = editor.getDocument();
     StringReader reader = new StringReader(html);
     try {
          kit.read(reader, doc, location);
     } catch (BadLocationException e) {}
//listen for actions being performed and process them
public void actionPerformed(ActionEvent e) {
//if the action is from the textfield (e.g. user hits enter)
     if (e.getActionCommand().equals(textFieldString)) {
          JTextField fromUser = (JTextField)e.getSource();
     if (fromUser != null){
//place user text in editor pane
//send message to server
               if (userName.getText() != null) {
                    userString = userName.getText().trim();
               out.println(userString + ": " + fromUser.getText());
          fromUser.setText("");
     } else if(e.getActionCommand().equals(connectString)) {
          CONNECTFLAG = true;
} else if (e.getActionCommand().equals(loadgraphicString) ) {
          final JFileChooser fc = new JFileChooser();
          int returnVal = fc.showOpenDialog(this);
          if (returnVal == JFileChooser.APPROVE_OPTION) {
               File file = fc.getSelectedFile();
               dPanel.loadImage(file.getAbsolutePath());
               sendImage(file);
     else if (e.getActionCommand().equals(fontlist)){
     JComboBox cb = (JComboBox)e.getSource();
String newSelection = (String)cb.getSelectedItem();
currentFont = newSelection;
     userString = currentFont;
return;
/*public void itemStateChanged (ItemEvent e) {
if ( e.getStateChange() != ItemEvent.SELECTED ) {
return;
if ( list == fontlist ) {
fontchoice = (String)fontlist.getSelectedItem();
     userString.changeFont(fontchoice);
//append text to the editor pane and put it at the bottom
public static void appendText(String text) {
     if (text.startsWith("ID ") ) {
          userString = text.substring(3);
     } else if (text.startsWith("DRAW ") ) {
          if (text.regionMatches(5,"LINE",0,4)) {
dPanel.processLine(text);
     }else if (text.regionMatches(5,"POINTS",0,5)) {
     dPanel.processPoint(text);
     } else if (text.startsWith("IMAGE ") ) {
int len = (new Integer( text.substring(6, text.indexOf(",")))).intValue();
//get x and y coordinates
     byte[] data = new byte[ (int)len ];
     int read = 0;
try {
     while (read < len) {
     data = text.getBytes( text.substring(0, len) );
} catch (Exception e) {}
     Image theImage = null;
     theImage = dPanel.getToolkit().createImage(data);
     dPanel.getToolkit().prepareImage(theImage, -1, -1, dPanel);
     while ((dPanel.getToolkit().checkImage(theImage, -1, -1, dPanel) & dPanel.ALLBITS) == 0) {}
          dPanel.drawPicture(0, 0, theImage);
} else {
//set current position in editorPane to the end
          editorPane.setCaretPosition(editorPane.getDocument().getLength());
//put text into the editorPane
          try {
               insertTheHTML(editorPane, text, editorPane.getDocument().getLength());
          } catch (IOException e) {}
} //end of appendText(String)
public void sendImage(File file) {
//find length of file
     long len = file.length();
//read file into byte array
     byte[] byteArray = new byte[(int)len];
     try {
          FileInputStream fstream = new FileInputStream(file);
          if (fstream.read(byteArray) < len) {
//error could not load file
          } else {
          out.println("IMAGE " + len + ",");
               out.write(byteArray, 0, (int)len); //write file to stream
     } catch(Exception e){}
//run the client
public static void main(String[] args) {
     String ipAddr=null, portNr=null;
          if (args.length != 2) {
               System.out.println("USAGE: java guiClient IP_Address port_number");
               System.exit(0);
          } else {
     ipAddr = args[0];
          portNr = args[1];
          JFrame frame = new guiClient();
          frame.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) { System.exit(0); }
          frame.pack();
          frame.setVisible(true);
          while(CONNECTFLAG == false){}
//sames as previous client,
//set up connection and then listen for messages from the Server
          String socketIP = ipAddr;
          int port = Integer.parseInt(portNr);
//the IP address of the machine where the server is running
          Socket theSocket = null;
//communication line to the server
          out = null;
//for message sending
          BufferedReader in = null;
//for message receiving
          try {
          theSocket = new Socket(socketIP, port );
//try to connect
          out = new PrintStream(theSocket.getOutputStream());
               dPanel.out = out;
//for client to send messages
          in = new BufferedReader(new InputStreamReader(theSocket.getInputStream()));
               BufferedReader userIn = new BufferedReader(new InputStreamReader(System.in));
               String fromServer;
               while ((fromServer = in.readLine()) != null) {
               appendText(fromServer);
               if (fromServer.equals("BYE")) {
                    appendText("Connection Closed");
                    break;
          out.close();
//close all streams
          in.close();
          theSocket.close();
//close the socket
     } catch (UnknownHostException e) {
//if the socket cannot be openned
          System.err.println("Cannot find " + socketIP);
          System.exit(1);
          } catch (IOException e) { //if the socket cannot be read or written
          System.err.println("Could not make I/O connection with " + socketIP);
          System.exit(1);
class HyperListener implements HyperlinkListener {
public JEditorPane sourcePane;
public void hyperlinkUpdate(HyperlinkEvent e) {
if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
sourcePane = (JEditorPane) e.getSource();
               if (e instanceof HTMLFrameHyperlinkEvent) {
HTMLFrameHyperlinkEvent event = (HTMLFrameHyperlinkEvent) e;
                    System.out.println(event.getTarget());
                    HTMLDocument doc = (HTMLDocument) sourcePane.getDocument();
                    doc.processHTMLFrameHyperlinkEvent(event);
else {
try {}
catch (Exception ev){
     ev.printStackTrace();
Well sorry the source code takes up the whole forum but I need a good feedback from this.

Answer 1

All right...
public class guiClient extends JFrame implements ActionListener {
static String userString;
static String currentFont;
String fontchoice;
String fontlist;
static JTextField userName = new JTextField();
public guiClient() {
     super("My Client");
public guiClient() {
     super("My Client");
// Create a ComboBox
GraphicsEnvironment gEnv = GraphicsEnvironment.getLocalGraphicsEnvironment();
String envfonts[] = gEnv.getAvailableFontFamilyNames();
Vector vector = new Vector();
for ( int i = 1; i < envfonts.length; i++ ) {
vector.addElement(envfonts);
JComboBox fontlist = new JComboBox (envfonts);
     fontlist.setSelectedIndex(0);
     fontlist.setEditable(true);
     fontlist.addActionListener(this);
     fontchoice = envfonts[0];     
//Create a regular text field.
     JTextField textField = new JTextField(10);
     textField.setActionCommand(textFieldString);
     textField.addActionListener(this);
public void actionPerformed(ActionEvent e) {
//if the action is from the textfield (e.g. user hits enter)
     if (e.getActionCommand().equals(textFieldString)) {
          JTextField fromUser = (JTextField)e.getSource();
     if (fromUser != null){
//place user text in editor pane
//send message to server
               if (userName.getText() != null) {
                    userString = userName.getText().trim();
               out.println(userString + ": " + fromUser.getText());
          fromUser.setText("");
     else if (e.getActionCommand().equals(fontlist)){
     JComboBox cb = (JComboBox)e.getSource();
String newSelection = (String)cb.getSelectedItem();
currentFont = newSelection;
     userString = currentFont;
return;