HELP for writing a Programme that displays text.

Question

Check the API for methods in JEditorPane. Then write and run a program that uses a JEditorPane to just display text, just text.
What should I add or delete in the following code so that it just displays TEXT.
My code is ----->
WEBBROWSER------------------>
import java.awt.*;
import java.awt.event.*;
import java.net.*;
// Java extension packages
import javax.swing.*;
import javax.swing.event.*;
public class WebBrowser extends JFrame {
private WebToolBar toolBar;
private WebBrowserPane browserPane;
// WebBrowser constructor
public WebBrowser()
super( "Deitel Web Browser" );
// create WebBrowserPane and WebToolBar for navigation
browserPane = new WebBrowserPane();
toolBar = new WebToolBar( browserPane );
// lay out WebBrowser components
Container contentPane = getContentPane();
contentPane.add( toolBar, BorderLayout.NORTH );
contentPane.add( new JScrollPane( browserPane ),
BorderLayout.CENTER );
// execute application
public static void main( String args[] )
WebBrowser browser = new WebBrowser();
browser.setDefaultCloseOperation( EXIT_ON_CLOSE );
browser.setSize( 640, 480 );
browser.setVisible( true );
} // end main
} // end class WebBrowser
WebPane.java
// WebBrowserPane.java
// WebBrowserPane is a simple Web-browsing component that
// extends JEditorPane and maintains a history of visited URLs.
package browser;
// Java core packages
import java.util.*;
import java.net.*;
import java.io.*;
// Java extension packages
import javax.swing.*;
import javax.swing.event.*;
public class WebBrowserPane extends JEditorPane {
private List history = new ArrayList();
private int historyIndex;
// WebBrowserPane constructor
public WebBrowserPane()
// disable editing to enable hyperlinks
setEditable( false );
// display given URL and add it to history
public void goToURL( URL url )
displayPage( url );
history.add( url );
historyIndex = history.size() - 1;
// display next history URL in editorPane
public URL forward()
historyIndex++;
// do not go past end of history
if ( historyIndex >= history.size() )
historyIndex = history.size() - 1;
URL url = ( URL ) history.get( historyIndex );
displayPage( url );
return url;
// display previous history URL in editorPane
public URL back()
historyIndex--;
// do not go past beginning of history
if ( historyIndex < 0 )
historyIndex = 0;
// display previous URL
URL url = ( URL ) history.get( historyIndex );
displayPage( url );
return url;
// display given URL in JEditorPane
private void displayPage( URL pageURL )
// display URL
try {
setPage( pageURL );
// handle exception reading from URL
catch ( IOException ioException ) {
ioException.printStackTrace();
WebPAne.java---------------
// WebToolBar.java
// WebToolBar is a JToolBar subclass that contains components
// for navigating a WebBrowserPane. WebToolBar includes back
// and forward buttons and a text field for entering URLs.
package browser;
// Java core packages
import java.awt.*;
import java.awt.event.*;
import java.net.*;
// Java extension packages
import javax.swing.*;
import javax.swing.event.*;
public class WebToolBar extends JToolBar
implements HyperlinkListener {
private WebBrowserPane webBrowserPane;
private JButton backButton;
private JButton forwardButton;
private JTextField urlTextField;
// WebToolBar constructor
public WebToolBar( WebBrowserPane browser )
super( "Web Navigation" );
// register for HyperlinkEvents
webBrowserPane = browser;
webBrowserPane.addHyperlinkListener( this );
// create JTextField for entering URLs
urlTextField = new JTextField( 25 );
urlTextField.addActionListener(
new ActionListener() {
// navigate webBrowser to user-entered URL
public void actionPerformed( ActionEvent event )
// attempt to load URL in webBrowserPane
try {
URL url = new URL( urlTextField.getText() );
webBrowserPane.goToURL( url );
// handle invalid URL
catch ( MalformedURLException urlException ) {
urlException.printStackTrace();
// create JButton for navigating to previous history URL
backButton = new JButton( new ImageIcon(
getClass().getResource( "images/back.gif" ) ) );
//backButton = new JButton( "Back");
backButton.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
// navigate to previous URL
URL url = webBrowserPane.back();
// display URL in urlTextField
urlTextField.setText( url.toString() );
// create JButton for navigating to next history URL
forwardButton = new JButton( new ImageIcon(
getClass().getResource( "images/forward.gif" ) ) );
//forwardButton = new JButton("Fwd");
forwardButton.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
// navigate to next URL
URL url = webBrowserPane.forward();
// display new URL in urlTextField
urlTextField.setText( url.toString() );
// add JButtons and JTextField to WebToolBar
add( backButton );
add( forwardButton );
add( urlTextField );
} // end WebToolBar constructor
// listen for HyperlinkEvents in WebBrowserPane
public void hyperlinkUpdate( HyperlinkEvent event )
// if hyperlink was activated, go to hyperlink's URL
if ( event.getEventType() ==
HyperlinkEvent.EventType.ACTIVATED ) {
// get URL from HyperlinkEvent
URL url = event.getURL();
// navigate to URL and display URL in urlTextField
webBrowserPane.goToURL( url );
urlTextField.setText( url.toString() );
Please REPLY.

Answer 1

WEBBROWSER------------------>
import java.awt.*;
import java.awt.event.*;
import java.net.*;
// Java extension packages
import javax.swing.*;
import javax.swing.event.*;
public class WebBrowser extends JFrame {
private WebToolBar toolBar;
private WebBrowserPane browserPane;
// WebBrowser constructor
public WebBrowser()
super( "Deitel Web Browser" );
// create WebBrowserPane and WebToolBar for navigation
browserPane = new WebBrowserPane();
toolBar = new WebToolBar( browserPane );
// lay out WebBrowser components
Container contentPane = getContentPane();
contentPane.add( toolBar, BorderLayout.NORTH );
contentPane.add( new JScrollPane( browserPane ),
BorderLayout.CENTER );
// execute application
public static void main( String args[] )
WebBrowser browser = new WebBrowser();
browser.setDefaultCloseOperation( EXIT_ON_CLOSE );
browser.setSize( 640, 480 );
browser.setVisible( true );
} // end main
} // end class WebBrowser
WebPane.java
// WebBrowserPane.java
// WebBrowserPane is a simple Web-browsing component that
// extends JEditorPane and maintains a history of visited URLs.
package browser;
// Java core packages
import java.util.*;
import java.net.*;
import java.io.*;
// Java extension packages
import javax.swing.*;
import javax.swing.event.*;
public class WebBrowserPane extends JEditorPane {
private List history = new ArrayList();
private int historyIndex;
// WebBrowserPane constructor
public WebBrowserPane()
// disable editing to enable hyperlinks
setEditable( false );
// display given URL and add it to history
public void goToURL( URL url )
displayPage( url );
history.add( url );
historyIndex = history.size() - 1;
// display next history URL in editorPane
public URL forward()
historyIndex++;
// do not go past end of history
if ( historyIndex >= history.size() )
historyIndex = history.size() - 1;
URL url = ( URL ) history.get( historyIndex );
displayPage( url );
return url;
// display previous history URL in editorPane
public URL back()
historyIndex--;
// do not go past beginning of history
if ( historyIndex < 0 )
historyIndex = 0;
// display previous URL
URL url = ( URL ) history.get( historyIndex );
displayPage( url );
return url;
// display given URL in JEditorPane
private void displayPage( URL pageURL )
// display URL
try {
setPage( pageURL );
// handle exception reading from URL
catch ( IOException ioException ) {
ioException.printStackTrace();
WebPAne.java---------------
// WebToolBar.java
// WebToolBar is a JToolBar subclass that contains components
// for navigating a WebBrowserPane. WebToolBar includes back
// and forward buttons and a text field for entering URLs.
package browser;
// Java core packages
import java.awt.*;
import java.awt.event.*;
import java.net.*;
// Java extension packages
import javax.swing.*;
import javax.swing.event.*;
public class WebToolBar extends JToolBar
implements HyperlinkListener {
private WebBrowserPane webBrowserPane;
private JButton backButton;
private JButton forwardButton;
private JTextField urlTextField;
// WebToolBar constructor
public WebToolBar( WebBrowserPane browser )
super( "Web Navigation" );
// register for HyperlinkEvents
webBrowserPane = browser;
webBrowserPane.addHyperlinkListener( this );
// create JTextField for entering URLs
urlTextField = new JTextField( 25 );
urlTextField.addActionListener(
new ActionListener() {
// navigate webBrowser to user-entered URL
public void actionPerformed( ActionEvent event )
// attempt to load URL in webBrowserPane
try {
URL url = new URL( urlTextField.getText() );
webBrowserPane.goToURL( url );
// handle invalid URL
catch ( MalformedURLException urlException ) {
urlException.printStackTrace();
// create JButton for navigating to previous history URL
backButton = new JButton( new ImageIcon(
getClass().getResource( "images/back.gif" ) ) );
//backButton = new JButton( "Back");
backButton.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
// navigate to previous URL
URL url = webBrowserPane.back();
// display URL in urlTextField
urlTextField.setText( url.toString() );
// create JButton for navigating to next history URL
forwardButton = new JButton( new ImageIcon(
getClass().getResource( "images/forward.gif" ) ) );
//forwardButton = new JButton("Fwd");
forwardButton.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
// navigate to next URL
URL url = webBrowserPane.forward();
// display new URL in urlTextField
urlTextField.setText( url.toString() );
// add JButtons and JTextField to WebToolBar
add( backButton );
add( forwardButton );
add( urlTextField );
} // end WebToolBar constructor
// listen for HyperlinkEvents in WebBrowserPane
public void hyperlinkUpdate( HyperlinkEvent event )
// if hyperlink was activated, go to hyperlink's URL
if ( event.getEventType() ==
HyperlinkEvent.EventType.ACTIVATED ) {
// get URL from HyperlinkEvent
URL url = event.getURL();
// navigate to URL and display URL in urlTextField
webBrowserPane.goToURL( url );
urlTextField.setText( url.toString() );
}