Cookie's Shitty Webbrowser

import javax.swing.*;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLFrameHyperlinkEvent;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
import java.util.ArrayList;

/**
 * Created by IntelliJ IDEA.
 * User: Nathaniel
 * Date: 8/31/11
 * Time: 5:57 PM
 * To change this template use File | Settings | File Templates.
 */

public class Browser extends JFrame implements HyperlinkListener {
    private ArrayList pageList = new ArrayList();

    private JTextField address;
    private JButton go;
    private JButton back;
    private JButton next;
    private JScrollPane scrollPane1;
    private JEditorPane body;


    public static void main(String[] args) {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    try {
                        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                    } catch (Exception e) {
                    }
                    Browser g = new Browser();
                    g.setVisible(true);
                }
            });
        } catch (Exception ex) {
        }
    }

    public Browser() {
        address = new JTextField();
        go = new JButton();
        back = new JButton();
        next = new JButton();
        scrollPane1 = new JScrollPane();
        body = new JEditorPane();
        Container contentPane = getContentPane();
        go.setText("Go");
        back.setText("<");
        next.setText(">");
        {
            body.setContentType("text/html");
            scrollPane1.setViewportView(body);
        }

        GroupLayout contentPaneLayout = new GroupLayout(contentPane);
        contentPane.setLayout(contentPaneLayout);
        contentPaneLayout.setHorizontalGroup(
                contentPaneLayout.createParallelGroup()
                        .addGroup(contentPaneLayout.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(contentPaneLayout.createParallelGroup()
                                        .addComponent(scrollPane1, GroupLayout.DEFAULT_SIZE, 597, Short.MAX_VALUE)
                                        .addGroup(contentPaneLayout.createSequentialGroup()
                                                .addComponent(back, GroupLayout.PREFERRED_SIZE, 43, GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(next)
                                                .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(address, GroupLayout.DEFAULT_SIZE, 446, Short.MAX_VALUE)
                                                .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(go)))
                                .addContainerGap())
        );
        contentPaneLayout.setVerticalGroup(
                contentPaneLayout.createParallelGroup()
                        .addGroup(contentPaneLayout.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(contentPaneLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                                        .addComponent(back)
                                        .addComponent(next)
                                        .addComponent(address, GroupLayout.PREFERRED_SIZE, 23, GroupLayout.PREFERRED_SIZE)
                                        .addComponent(go))
                                .addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(scrollPane1, GroupLayout.DEFAULT_SIZE, 357, Short.MAX_VALUE)
                                .addContainerGap())
        );
        pack();
        setLocationRelativeTo(getOwner());
        setTitle("Cookie's Java Browser");
        back.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (pageList.size() > 1) {
                    URL currentUrl = body.getPage();
                    int pageIndex = pageList.indexOf(currentUrl.toString());
                    try {
                        showPage(new URL((String) pageList.get(pageIndex - 1)), false);
                    } catch (Exception ex) {
                    }
                }
            }
        });
        next.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                URL currentUrl = body.getPage();
                int pageIndex = pageList.indexOf(currentUrl.toString());
                if (pageList.get(pageIndex + 1) != null) {
                    try {
                        showPage(new URL((String) pageList.get(pageIndex + 1)), false);
                    } catch (Exception ex) {
                    }
                }
            }
        });
        go.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                URL url = verifyUrl(address.getText());
                if (url != null) {
                    showPage(url, true);
                } else {
                    showError("Invalid URL");
                }
            }
        });
    }

    private void showPage(URL pageUrl, boolean addToList) {
        setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
        try {
            URL currentUrl = body.getPage();
            body.setPage(pageUrl);
            URL newUrl = body.getPage();
            if (addToList) {
                int listSize = pageList.size();
                if (listSize > 0) {
                    int pageIndex = pageList.indexOf(currentUrl.toString());
                    if (pageIndex < listSize - 1) {
                        for (int i = listSize - 1; i > pageIndex; i--) {
                            pageList.remove(i);
                        }
                    }
                }
                pageList.add(newUrl.toString());
            }
            address.setText(newUrl.toString());
        } catch (Exception e) {
        } finally {
            setCursor(Cursor.getDefaultCursor());
        }
    }

    public void hyperlinkUpdate(HyperlinkEvent event) {
        HyperlinkEvent.EventType eventType = event.getEventType();
        if (eventType == HyperlinkEvent.EventType.ACTIVATED) {
            if (event instanceof HTMLFrameHyperlinkEvent) {
                HTMLFrameHyperlinkEvent linkEvent = (HTMLFrameHyperlinkEvent) event;
                HTMLDocument document = (HTMLDocument) body.getDocument();
                document.processHTMLFrameHyperlinkEvent(linkEvent);
            } else {
                showPage(event.getURL(), true);
            }
        }
    }

    private void showError(String errorMessage) {
        JOptionPane.showMessageDialog(this, errorMessage, "Error", JOptionPane.ERROR_MESSAGE);
    }

    private URL verifyUrl(String url) {
        if (!url.toLowerCase().startsWith("http://"))
            return null;
        URL verifiedUrl = null;
        try {
            verifiedUrl = new URL(url.toLowerCase());
        } catch (Exception e) {
            return null;
        }
        return verifiedUrl;
    }
}