Re: build a browser in java

From:

Michael Rauscher <michlmann@gmx.de>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 25 Sep 2006 00:50:34 +0200

Message-ID:

<ef71um$40v$1@registered.motzarella.org>

isha schrieb:

does ne1 hav any clue as to how to go about building a browser using
java..im lost

Here's one:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.html.*;

public class Browser {

     private JTextField addressField;
     private JEditorPane editorPane;

     private void initComponents() {
         addressField = new JTextField(50);
         editorPane = new JEditorPane();
         editorPane.setEditable( false );

         addressField.addActionListener( new ActionListener() {
             public void actionPerformed( ActionEvent e ) {
                 setPage( addressField.getText().trim() );
             }
         });

         editorPane.addHyperlinkListener( new HyperlinkListener() {
             public void hyperlinkUpdate( HyperlinkEvent e ) {
                 if ( e.getEventType() ==
HyperlinkEvent.EventType.ACTIVATED ) {
                     if ( e instanceof HTMLFrameHyperlinkEvent ) {
                         HTMLFrameHyperlinkEvent evt =
(HTMLFrameHyperlinkEvent)e;
                         HTMLDocument doc =
(HTMLDocument)editorPane.getDocument();
                         doc.processHTMLFrameHyperlinkEvent( evt );
                     } else {
                         setPage( e.getURL().toString() );
                     }
                 }
             }
         });
     }

     public void setPage( String page ) {
         try {
             editorPane.setPage( page );
             addressField.setText( page );
         } catch ( Exception ex ) {
             JOptionPane.showMessageDialog( null, ex.getMessage() );
         }
     }

     private JComponent createAddressPanel() {
         JLabel addressLabel = new JLabel("Address" );
         addressLabel.setDisplayedMnemonic( KeyEvent.VK_A );
         addressLabel.setLabelFor( addressField );

         Box addressPanel = new Box( BoxLayout.X_AXIS );
         addressPanel.add( addressLabel );
         addressPanel.add( Box.createHorizontalStrut(5) );
         addressPanel.add( addressField );

         return addressPanel;
     }

     private void createAndShowGUI() {
         initComponents();

         JPanel contentPanel = new JPanel( new BorderLayout() );
         JComponent addressPanel = createAddressPanel();
         addressPanel.setBorder( BorderFactory.createEmptyBorder(5,5,5,5) );

         contentPanel.add( addressPanel, BorderLayout.NORTH );
         contentPanel.add( new JScrollPane(editorPane) );

         JFrame frame = new JFrame("Browser");
         frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
         frame.setContentPane( contentPanel );
         frame.pack();
         frame.setVisible(true);
     }

     public static final void main( String args[] ) {
         EventQueue.invokeLater( new Runnable() {
             public void run() {
                 new Browser().createAndShowGUI();
             }
         });
     }
}

Bye
Michael