Simple Web Browser Example

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

JFrame browser( startingUrl ) {
    invoke( method, args ) {}

    windowClosing(WindowEvent we) {
        we.getWindow().setVisible(false);
    }

    setPage( url ) {
        try {
          pane.setPage( url );
        } catch(Exception e) {
          statusBar.setText("Error opening page: "+url);
        }
    }

    hyperlinkUpdate( HyperlinkEvent he ) {
        type = he.getEventType();
        if (type == HyperlinkEvent.EventType.ENTERED) {
            pane.setCursor(
                Cursor.getPredefinedCursor( Cursor.HAND_CURSOR) );
            statusBar.setText(he.getURL().toString());
        } else 
            if (type == HyperlinkEvent.EventType.EXITED) {
            pane.setCursor( Cursor.getDefaultCursor() );
            statusBar.setText(" ");
        } else {
            setPage( he.getURL() );
            if (urlField != null)
                urlField.setText(he.getURL().toString());
        }
    }

    frame = new JFrame("Browser");
    frame.setSize(400,300);
    frame.addWindowListener( this );

    urlPanel = new JPanel();
    urlPanel.setLayout(new BorderLayout());
    urlField = new JTextField(startingUrl);
    urlPanel.add(new JLabel("Site: "), BorderLayout.WEST);
    urlPanel.add(urlField, BorderLayout.CENTER);

    statusBar = new JLabel(" ");
    pane = new JEditorPane();
    pane.setEditable(false);
    setPage( startingUrl );
    jsp = new JScrollPane(pane); 

    frame.getContentPane().add(jsp, BorderLayout.CENTER);
    frame.getContentPane().add(urlPanel, BorderLayout.SOUTH);
    frame.getContentPane().add(statusBar, BorderLayout.NORTH);

    // This is the equivalent of an inner class in bsh.
    urlTextHandler() {
        actionPerformed(ActionEvent ae) {
            setPage( ae.getActionCommand() );
        }
        return this;
    }

    urlField.addActionListener( urlTextHandler() );
    pane.addHyperlinkListener( (HyperlinkListener)this );

    return frame;
}

browser = browser("http://java.sun.com/");
browser.show();