LinkBack URL
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problem in my code
package browser; import java.awt.*; import java.awt.datatransfer.Clipboard; import java.awt.datatransfer.StringSelection; import java.awt.event.*; import java.awt.print.PrinterJob; import javax.swing.*; import javax.swing.border.*; import javax.swing.event.*; import javax.swing.text.*; import java.io.*; import java.net.URL; import java.util.*; import javax.swing.text.html.*; public class Genxplora extends JPanel { public JMenuBar menubar; public JEditorPane jep; final JLabel statusbar; public JToolBar tool_bar; JTextField urlfield; //CheckboxMenuItem add_bar; //CheckboxMenuItem sta_bar; JComboBox combo; static JTextField ta; JScrollPane jsp=new JScrollPane(jep); JButton go; private Stack urlstack=new Stack(); private Stack urlstack1=new Stack(); private JTextComponent textComp; Clipboard clipbd = getToolkit().getSystemClipboard(); PrinterJob prtMe = PrinterJob.getPrinterJob(); public Genxplora() { menubar=new JMenuBar(); JPanel urlpanel=new JPanel(); urlpanel.setLayout(new BorderLayout()); statusbar=new JLabel(" Status Bar "); jep=new JEditorPane(); textComp=createTextComponent(); demoaction back=new demoaction("Back",new ImageIcon("PreviousArrow.gif"),"back",'b'); demoaction forward=new demoaction("Forward",new ImageIcon("NextArrow.gif "),"forward",'f'); demoaction stop=new demoaction("Stop",new ImageIcon("STOPSML.gif "),"stop",'s'); demoaction refresh=new demoaction("Refresh",new ImageIcon("return.gif "),"refresh",'r'); demoaction home=new demoaction("Home",new ImageIcon("web.gif"),"home",'h'); demoaction help=new demoaction("Help",new ImageIcon("help.gif"),"help",'p'); JMenu file=new JMenu("File"); JMenuItem it1,it2,it3,it4,it5,it6,it7,it8,it9; JMenu sub=new JMenu("New"); sub.add(it1=new JMenuItem("Window")); it1.setEnabled(true); file.add(sub); file.add(it2=new JMenuItem("Open...")); file.add(it3=new JMenuItem("Save")); it3.setEnabled(true); file.add(it4=new JMenuItem("Save As...")); file.add(new JMenuItem().add(new JSeparator())); // file.add(it5=new JMenuItem("Page Setup...")); // it5.setEnabled(true); file.add(it6=new JMenuItem("Print...")); it6.setEnabled(true); // file.add(it7=new JMenuItem("Print Preview...")); //it7.setEnabled(true); file.add(new JMenuItem().add(new JSeparator())); //file.add(it8=new JMenuItem("Send")); //it8.setEnabled(true); file.add(new JMenuItem().add(new JSeparator())); file.add(it9=new JMenuItem("Close")); menubar.add(file); JMenu edit=new JMenu("Edit"); JMenuItem ite1,ite3,ite4,ite5,ite6,ite7,ite8,ite9; JMenuItem ite2; edit.add(ite1=new JMenuItem("Cut")); ite1.setEnabled(false); edit.add(ite2=new JMenuItem("Copy")); ite2.setEnabled(false); edit.add(ite3=new JMenuItem("Paste")); ite3.setEnabled(false); edit.add(new JMenuItem().add(new JSeparator())); edit.add(ite4=new JMenuItem("Select All")); ite4.setEnabled(true); edit.add(ite5=new JMenuItem("Find(on this Page)...")); ite5.setEnabled(true); menubar.add(edit); JMenu view=new JMenu("View"); JMenuItem itv1,itv2,itv3,itv4,itv5,itv6,itv7,itv8,itv9; /* JMenu sub1=new JMenu("tool_go"); add_bar=new CheckboxMenuItem("Address bar"); sta_bar=new CheckboxMenuItem("Status Bar"); view.add(sub1); */ view.add(new JMenuItem().add(new JSeparator())); JMenu sub2=new JMenu("Go To"); sub2.add(back); sub2.add(forward); sub2.add(new JMenuItem().add(new JSeparator())); sub2.add(home); sub2.add(new JMenuItem().add(new JSeparator())); view.add(sub2); view.add(stop); view.add(refresh); view.add(new JMenuItem().add(new JSeparator())); view.add(itv1=new JMenuItem("Full Screen")); menubar.add(view); JMenu help1=new JMenu("Help"); JMenuItem tip=new JMenuItem("tip of the day"); JMenuItem about=new JMenuItem("about browser"); help1.add(tip); help1.add(about); menubar.add(help1); myhandler handler=new myhandler(this); it1.addActionListener(handler); it2.addActionListener(handler); it3.addActionListener(handler); it4.addActionListener(handler); // it5.addActionListener(handler); it6.addActionListener(handler); //it7.addActionListener(handler); //it8.addActionListener(handler); it9.addActionListener(handler); ite1.addActionListener(handler); ite2.addActionListener(handler); ite3.addActionListener(handler); ite4.addActionListener(handler); ite5.addActionListener(handler); itv1.addActionListener(handler); tip.addActionListener(handler); about.addActionListener(handler); tool_bar=new JToolBar(" Tool"); tool_bar.add(back); tool_bar.add(forward); tool_bar.add(new JSeparator()); tool_bar.add(stop); tool_bar.add(refresh); tool_bar.add(home); home.setEnabled(false); tip.setEnabled(true); about.setEnabled(true); JLabel label=new JLabel("Address"); tool_bar.add(label); String lst[]={"http://localhost/java_site1.html","http://localhost/html_parse.html","http://localhost/java_site.html"}; urlfield=new JTextField(); urlfield.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { try { urlstack.push(urlfield.getText()); // urlstack1.push(urlfileld.getText()); urlfield.setText(urlfield.getText()); jep.setPage( urlfield.getText()); statusbar.setText( urlfield.getText()); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); } catch(IOException e) { jep.setText("ERROR OPENING REQUESTED PAGE......\n\n"+e); JOptionPane.showMessageDialog(Genxplora.this,"Requested Page Not Found.....","ERROR",JOptionPane.ERROR_MESSAGE); } } }); tool_bar.add(urlfield); go=new JButton("Go"); go.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { try { urlstack.push(urlfield.getText()); // urlstack1.push(urlfileld.getText()); urlfield.setText(urlfield.getText()); jep.setPage( urlfield.getText()); statusbar.setText( urlfield.getText()); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); } catch(IOException e) { jep.setText("ERROR...........\n\n"+e); JOptionPane.showMessageDialog(Genxplora.this,"Requested Page Not Found.....","ERROR",JOptionPane.ERROR_MESSAGE); } } }); tool_bar.add(go); jep.addHyperlinkListener(new HyperlinkListener() { public void hyperlinkUpdate(HyperlinkEvent he) { if(he.getEventType()==HyperlinkEvent.EventType.ACTIVATED) { try { urlstack.push(urlfield.getText()); // urlstack1.push(urlfileld.getText()); urlfield.setText(urlfield.getText()); jep.setPage( urlfield.getText()); statusbar.setText( urlfield.getText()); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); } catch(IOException e) { jep.setText("ERROR OPENING HYPERLINK..........\n\n"+e); statusbar.setText("Error Opening Hyperlink......."); JOptionPane.showMessageDialog(Genxplora.this,"Requested Page Not Found.....","ERROR",JOptionPane.ERROR_MESSAGE); } } } }); } public static void main(String s[]) throws IOException { Genxplora tool=new Genxplora(); tool.jep=new JEditorPane(); tool.jep.setPreferredSize(new Dimension(790,448)); tool.jep.setBorder(new BevelBorder(BevelBorder.LOWERED)); tool.tool_bar.setMaximumSize(tool.tool_bar.getSize()); JFrame frame=new JFrame("Genxplora"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setJMenuBar(tool.menubar); frame.getContentPane().add(tool.tool_bar,BorderLayout.NORTH); frame.getContentPane().add(tool.jep,BorderLayout.CENTER); frame.getContentPane().add(tool.statusbar,BorderLayout.SOUTH); frame.pack(); frame.setVisible(true); tool.jep.setEditable(false); } //end of class main class demoaction extends AbstractAction { public demoaction(String text,Icon icon,String descri,char acc) { super(text,icon); putValue(ACCELERATOR_KEY,KeyStroke.getKeyStroke(acc,Toolkit.getDefaultToolkit().getMenuShortcutKeyMask())); putValue(SHORT_DESCRIPTION,descri); } // BackWard Button public void actionPerformed(ActionEvent ae) { if(ae.getActionCommand()=="Back") { if(urlstack.size()<0) { statusbar.setText("No Page available...."); return; } try { urlstack.push(urlfield.getText()); // urlstack1.push(urlfileld.getText()); urlfield.setText(urlfield.getText()); jep.setPage( urlfield.getText()); statusbar.setText( urlfield.getText()); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); } catch(IOException e) { jep.setText("ERROR......"+e); JOptionPane.showMessageDialog(Genxplora.this,"Back Action not allowed.....","ERROR",JOptionPane.ERROR_MESSAGE); } } //Forward Button Coding if(ae.getActionCommand()=="Forward") { if(urlstack1.size()<0) { statusbar.setText("No Page available..."); return; } try { urlstack.push(urlstack1.pop()); String urlstring=(String) urlstack1.peek(); urlfield.setText(urlstring); jep.setPage(urlstring); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); } catch(IOException e) { jep.setText("ERROR.........\n\n"+e); JOptionPane.showMessageDialog(Genxplora.this,"Forward Action not allowed.....","ERROR",JOptionPane.ERROR_MESSAGE); } } // Coding for stop if(ae.getActionCommand()=="Stop") { try { urlstack.pop(); String str=(String)urlstack.peek(); urlfield.setText(str); jep.setPage(str); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); statusbar.setText(str); } catch(IOException e) { statusbar.setText("ERROR....in stopping "); JOptionPane.showMessageDialog(Genxplora.this,"Stop Action not allowed.....","ERROR",JOptionPane.ERROR_MESSAGE); } } //end of stop //Coding of Refresh if(ae.getActionCommand()=="Refresh") { try { String str=(String)urlstack.peek(); urlfield.setText(str); jep.setPage(str); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); statusbar.setText("Refreshed site...."+str); } catch(IOException e) { jep.setText("ERROR IN REFRESHING PAGE......"); statusbar.setText("ERROR IN REFRESHING REQUESTED PAGE......"); JOptionPane.showMessageDialog(Genxplora.this,"Refresh Action not allowed.....","ERROR",JOptionPane.ERROR_MESSAGE); } }//end of refresh } //end of action performed } //end of class demoaction class myhandler implements ActionListener { Genxplora tool; public myhandler(Genxplora tool) { this.tool=tool; } public void actionPerformed(ActionEvent ae) { if(ae.getActionCommand()=="Window") { Genxplora tool1= new Genxplora(); tool1.jep=new JEditorPane(); tool1.jep.setPreferredSize(new Dimension(790,448)); tool1.jep.setBorder(new BevelBorder(BevelBorder.LOWERED)); tool1.tool_bar.setMaximumSize(tool1.tool_bar.getSize()); JFrame frame1=new JFrame("Genxplore"); frame1.setJMenuBar(tool1.menubar); frame1.getContentPane().add(tool1.tool_bar,BorderLayout.NORTH); frame1.getContentPane().add(tool1.jep,BorderLayout.CENTER); frame1.getContentPane().add(tool1.statusbar,BorderLayout.SOUTH); frame1.pack(); frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame1.setVisible(true); tool1.jep.setEditable(false); } if(ae.getActionCommand()=="Close") System.exit(0); //Event Handling for Open button if(ae.getActionCommand()=="Open...") { JFileChooser chooser=new JFileChooser(); chooser.setMultiSelectionEnabled(true); int option=chooser.showOpenDialog(Genxplora.this); if(option==JFileChooser.APPROVE_OPTION) { File[] sf=chooser.getSelectedFiles(); String flst="nothing"; if(sf.length > 0) flst=sf[0].getName(); for(int i=1;i<sf.length ;++i) flst+=","+sf[i].getName(); try { urlfield.setText("http://localhost/"+flst); jep.setPage("http://localhost/"+flst); statusbar.setText("http://localhost/"+flst); jep.addHyperlinkListener(new SimpleLinkListener(jep,urlfield,statusbar)); } catch(IOException e) { jep.setText("ERROR........"+e); JOptionPane.showMessageDialog(Genxplora.this,"Error opening requested document.....","ERROR",JOptionPane.ERROR_MESSAGE); } } else { System.out.println("You Canceled"); } } if(ae.getActionCommand()=="Save") { JFileChooser fc = new JFileChooser(); int returnVal = fc.showSaveDialog(Genxplora.this); if(returnVal == JFileChooser.APPROVE_OPTION) { String savefile = fc.getSelectedFile().getPath(); if(savefile == null) { return; } else { String docToSave = jep.getText(); if(docToSave != null) { FileOutputStream fstrm = null; BufferedOutputStream ostrm = null; try { fstrm = new FileOutputStream(savefile); ostrm = new BufferedOutputStream(fstrm); byte[] bytes = null; try { bytes = docToSave.getBytes(); } catch(Exception e1) { e1.printStackTrace(); } ostrm.write(bytes); } catch(IOException io) { System.err.println("IOException: " + io.getMessage()); } finally { try { ostrm.flush(); fstrm.close(); ostrm.close(); } catch(IOException ioe) { System.err.println("IOException: " + ioe.getMessage()); } } } } } else { return; } } if(ae.getActionCommand()=="Save As...") { JFileChooser chooser=new JFileChooser(); if(chooser.showSaveDialog(Genxplora.this)!=JFileChooser.APPROVE_OPTION) return; File file=chooser.getSelectedFile(); if(file==null) return; FileWriter writer=null; try { writer=new FileWriter(file); textComp.write(writer); } catch(IOException e) { JOptionPane.showMessageDialog(Genxplora.this,"File not saved","ERROR",JOptionPane.ERROR_MESSAGE); } finally { if(writer!=null) try { writer.close(); } catch(IOException e) {} } } /*if(ae.getActionCommand()=="Page Setup...") try { prtMe.printDialog(); } catch(Exception ew) { }*/ if(ae.getActionCommand()=="Print...") try { prtMe.printDialog(); } catch(Exception ew) { } if(ae.getActionCommand()=="Copy") try { String selection = jep.getSelectedText(); StringSelection clipString = new StringSelection(selection); clipbd.setContents(clipString, clipString); } catch(Exception ew) { } if(ae.getActionCommand()=="Select All") try { jep.selectAll(); } catch(Exception ew) { } if(ae.getActionCommand()=="Find(on this page)...") try { String find = ""; find = JOptionPane.showInputDialog( "Find on this page: "); } catch(Exception ew) { } if(ae.getActionCommand()=="Full Screen") { tool.jep.setPreferredSize(new Dimension(900,900)); } if(ae.getActionCommand()=="about browser") { JOptionPane.showMessageDialog(Genxplora.this,"Version no:101bgjy1" ,"ABOUT BROWSER",JOptionPane.INFORMATION_MESSAGE); } } public void itemStateChanged(ItemEvent ie) { } } protected JTextComponent createTextComponent() { JTextArea ta=new JTextArea(); ta.setLineWrap(true); return ta; } class MyWindowAdapter extends WindowAdapter { Genxplora tool; public MyWindowAdapter(Genxplora tool) { this.tool=tool; } public void windowClosing(WindowEvent we) { } } } class SimpleLinkListener implements HyperlinkListener { private JEditorPane pane; private JTextField urlfield; private JComboBox combox; private JLabel statusbar; public SimpleLinkListener(JEditorPane jep,JTextField jtf,JLabel j1) { pane=jep; urlfield=jtf; statusbar=j1; } public SimpleLinkListener(JEditorPane jep) { this(jep,null,null); } public void hyperlinkUpdate(HyperlinkEvent he) { HyperlinkEvent.EventType type = he.getEventType(); if (type == HyperlinkEvent.EventType.ENTERED) { if (statusbar != null) { statusbar.setText(he.getURL().toString()); } } else if(type == HyperlinkEvent.EventType.EXITED) { if (statusbar != null) { statusbar.setText(" "); } } else if(type == HyperlinkEvent.EventType.ACTIVATED) { if (he instanceof HTMLFrameHyperlinkEvent) { HTMLFrameHyperlinkEvent evt=(HTMLFrameHyperlinkEvent)he; HTMLDocument doc=(HTMLDocument)pane.getDocument(); doc.processHTMLFrameHyperlinkEvent(evt); } } else { try { pane.setPage(he.getURL()); if (urlfield!=null) { urlfield.setText(he.getURL().toString()); } } catch(FileNotFoundException e) { pane.setText("Could not open file : <tt>"+he.getURL()+"</tt>.<hr>"); } catch(Exception e) { e.printStackTrace(); } } } }
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