Need help in xml

Question

i want to know how to parse an xml doc using javax.xml.parsers
i have written a simple ide for java with lots of options and the software would look better if i include xml support.
u can find the code below.
/* Thank you for your interest in viewing the source of Jcom */
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.jar.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.undo.*;
import javax.swing.text.*;
// The main Class.
public class Jcom extends JFrame
JTextArea t=new JTextArea();
JTextField output;
Font f=new Font("SansSerif",Font.PLAIN,13);
int count=0,char_count=0,class_count=0,char_changed=0,recent_compile=0,tabinsert=0;
String curfile,Dir="./",text,file="Untitled",Key_word="",ext="java";
String menucomm[]={"New","Open","Save","Save as","Exit","Cut","Copy","Paste","Select All","Comment","Compile","Run","About","Shortcut List","Undo","Redo","Bookmark"};
File o_file;
OutputStream f1;
MessageWindow mw=new MessageWindow("Console Window.");
protected UndoManager undo = new UndoManager();
static Jcom jc;
StatusBar status;
JProgressBar progress;
displayProgress dp=new displayProgress("Loading in Progress.");
JComboBox jb;
// Constructor
public Jcom(String title) throws Exception
super(title);
setVisible(true);
//setIconImage(new ImageIcon("./images/icon.gif"));
t.setMargin(new Insets(20,30,20,20));
setSize(700,500);
String vers = System.getProperty("java.version");
if(vers.compareTo("1.1.2")>0)
t.setDragEnabled(true); // Works only in version 1.4
t.setAutoscrolls(true);
t.setFont(f);
t.setLineWrap(true);
t.setWrapStyleWord(true);
t.setTabSize(6);
Dimension dim=getToolkit().getScreenSize();
setLocation(dim.width/2-getWidth()/2,dim.height/2-getHeight()/2);
setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
addWindowListener(new Winlis());
undo.discardAllEdits();
//main() method
public static void main(String arg[]) throws Exception
jc=new Jcom("JCom - The Java IDE.");
jc.addmenu();
jc.addtools();
// Ask for exit
public void askexit()
int ch=2;
if(char_changed==1)
ch=JOptionPane.showOptionDialog(null,"Save Changes you made to "+file+" ?","Confirm",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE,null,null,null);
if(ch==0)
save_doc();
System.exit(0);
public boolean save_doc()
try
     if(file.equals("Untitled") || file==null)
          save_doc_as();
     else
     String text=t.getText();
     byte buf[]=text.getBytes();
     o_file=new File(Dir,file);
     OutputStream f1=new FileOutputStream(o_file);
     f1.write(buf);
     f1.close();
     char_changed=0;
     setTitle(file+" - JCompile");
//setIcon(new ImageIcon("./images/icon.gif");
     catch(Exception i)
     return false;
output.setText(file+" Total lines : "+t.getLineCount());
return true;
public boolean save_doc_as()
     try
     FileDialog fd=new FileDialog(this,"Save this document as",FileDialog.SAVE);
     fd.setVisible(true);
     file=fd.getFile();
     if(file==null)
     file="Untitled";
     return false;
     Dir=fd.getDirectory();
     text=t.getText();
     byte buf[]=text.getBytes();
     o_file=new File(Dir,file);
     f1=new FileOutputStream(o_file);
     f1.write(buf);
     f1.close();
     setTitle(file+" - JCompile");
     char_changed=0;
     setTitle(file+" - JCompile");
//setIcon(new ImageIcon("./images/icon.gif");
     catch(Exception e)
     return false;
output.setText(file+" Total lines : "+t.getLineCount());
return true;
public boolean compileit()
     try
     if(file.equals("Untitled"))
     if(save_doc()==false)
     return false;
     if(file==null)
     return false;
     if(char_changed==1)
     if(save_doc()==false)
     return false;
     output.setText("Compiling "+file+" ...");
     mw.jt.setText("Compiling "+file+" ..."+"\n");
     String comm="Javac.exe "+Dir+file;
     Process ps=Runtime.getRuntime().exec(comm);
     Runtime.getRuntime().gc();     
     InputStream textfile=ps.getErrorStream();
     DataInputStream dai=new DataInputStream(textfile);
     String S=dai.readLine();
     int errorcount=0;
     while(S != null)
     errorcount++;
     mw.jt.append(S+"\n");
     S=dai.readLine();
     if(errorcount==0)
          output.setText("Compilation Successful. Alt+v to Run the code.");
     else
     output.setText("Some Errors/Warnings occured during the compilation.");
     mw.setVisible(true);
     mw.setTitle("Compilation Results.");
     return false;
     }// end of try
     catch(IOException ie)
     JOptionPane.showMessageDialog(null, "Some I/O Error has occured. Please save your file and continue.", "I/O Error.",JOptionPane. ERROR_MESSAGE);
     return false;
     catch(Exception e)
     JOptionPane.showMessageDialog(null, "Exception has occured. Please save your file and continue.", "Exception.",JOptionPane. ERROR_MESSAGE);           
     return false;
     return true;
public void run_program()
     try
     if(file==null)
     return;
     if(!mw.isVisible())
     mw.setVisible(true);
     if(char_changed==1)
     if(save_doc()==false)
     return;
     if(compileit()==false)
     return;
     mw.jt.setText("\nExecuting "+file+" ..."+"\n");
     int pos_dot=file.indexOf('.');
     char class_name[]=file.toCharArray();
     String class_name_string=new String(class_name,0,pos_dot);
     String comm="java "+class_name_string;
     Runtime ru=Runtime.getRuntime();
     Process ps=ru.exec(comm);
     InputStream textfile=ps.getErrorStream();
     Runtime.getRuntime().gc();     
     DataInputStream dai=new DataInputStream(textfile);
     String S=dai.readLine();
     if(S!=null)
     mw.jt.append("\nFollowing Runtime Error has occured.\n");
     int errorcount=0;
     while(S != null)
     errorcount++;
     mw.jt.append(S+"\n");
     S=dai.readLine();
     DataInputStream din=new DataInputStream(ps.getInputStream());
     S=din.readLine();
     errorcount=0;
     while(S != null)
     errorcount++;
     mw.jt.append(S+"\n");
     S=din.readLine();
     mw.jt.append("Execution of "+file+" has terminated."+"\n");
     output.setText("Execution completed.");
     mw.setTitle("Execution Results.");
     catch(IOException ie)
     JOptionPane.showMessageDialog(null, "Exception has occured. Please save your work and continue. ", "I/O Error",JOptionPane. ERROR_MESSAGE);           
     return;
     catch(Exception e)
     JOptionPane.showMessageDialog(null, "Exception has occured. Please save your work and continue. ", "I/O Error",JOptionPane. ERROR_MESSAGE);           
     return;
public void addtools()
//Adding toolbar
JToolBar toolbar=new JToolBar();
String[] iconfiles={"./images/new.gif","./images/open.gif","./images/save.gif","./images/cut.gif","./images/copy.gif","./images/paste.gif","./images/compile.gif","./images/run.gif"};
jb = new JComboBox();
jb.addActionListener(new bookListen());
String[] butcomm={"New","Open","Save","Cut","Copy","Paste","Compile","Run"};
ImageIcon[] icons=new ImageIcon[iconfiles.length];
JButton[] buttons = new JButton[iconfiles.length];
for(int i=0;i<iconfiles.length;i++)
     icons=new ImageIcon(iconfiles[i]);
     buttons[i]=new JButton(icons[i]);
     buttons[i].addActionListener(new actListen());
     buttons[i].setActionCommand(butcomm[i]);
     buttons[i].setToolTipText(butcomm[i]);
     toolbar.add(buttons[i]);
     if(i+1%3==0)
     toolbar.addSeparator();
     getContentPane().add("North",toolbar);
status=new StatusBar();
getContentPane().add("South",status);
// this adds fonts support to the toolbar
/*JComboBox jc = new JComboBox();
     String[] fonts = getToolkit().getFontList();
     for (int i = 0; i < fonts.length; i++)
     jc.addItem(fonts[i]);
     toolbar.add(jc);*/
output=new JTextField(30);
output.setEditable(false);
status.add(output);
status.add(new JLabel("Bookmarks "));
jb.setMaximumRowCount(8);
status.add(jb); //Add bookmark list
validate();
}/* End of addtools*/
public void addmenu()
//Adding menu Bar
JMenuBar mb= new JMenuBar();
setJMenuBar(mb);
JMenuItem new1,open,save,save_as,cut,copy,paste,sel_all,und,red,find,replace,exit,about,compile,check,runit,shortcut_list,bookmark;
// Adding contents for menu bar
JMenu file=new JMenu("File");
JMenu edit=new JMenu("Edit");
JMenu search=new JMenu("Search");
JMenu tools=new JMenu("Tools");
JMenu make=new JMenu("Make");
JMenu help=new JMenu("Help");
new1=new JMenuItem("New");
new1.setToolTipText("Create a new file.");
new1.setIcon(new ImageIcon("./images/new.gif"));
new1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK ));
file.add(new1);
new1.addActionListener(new actListen());
open=new JMenuItem("Open");
open.setToolTipText("Open an existing file.");
open.setIcon(new ImageIcon("./images/open.gif"));
open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK ));
file.add(open);
open.addActionListener(new actListen());
save=new JMenuItem("Save");
save.setToolTipText("Save changes.");
save.setIcon(new ImageIcon("./images/save.gif"));
save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK ));
file.add(save);
save.addActionListener(new actListen());
save_as=new JMenuItem("Save as");
save_as.setToolTipText("Save changes as.");
file.add(save_as);
save_as.addActionListener(new actListen());
exit=new JMenuItem("Exit");
exit.setToolTipText("Exit.");
exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.ALT_MASK ));
file.add(exit);
exit.addActionListener(new actListen());
exit.setIcon(new ImageIcon("./images/exit.gif"));
mb.add(file);
cut=new JMenuItem("Cut");
cut.setToolTipText("Cut selection.");
cut.setIcon(new ImageIcon("./images/cut.gif"));
cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL_MASK ));
edit.add(cut);
cut.addActionListener(new actListen());
copy=new JMenuItem("Copy");
copy.setToolTipText("Copy selection.");
copy.setIcon(new ImageIcon("./images/copy.gif"));
copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK ));
edit.add(copy);
copy.addActionListener(new actListen());
paste=new JMenuItem("Paste");
paste.setToolTipText("Paste from clipboard.");
paste.setIcon(new ImageIcon("./images/paste.gif"));
paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK ));
edit.add(paste);
paste.addActionListener(new actListen());
sel_all=new JMenuItem("Select All");
sel_all.setToolTipText("Select all.");
sel_all.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK ));
edit.add(sel_all);
sel_all.addActionListener(new actListen());
und=new JMenuItem("Undo");
und.setToolTipText("Undo.");
und.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK ));
edit.add(und);
und.addActionListener(new actListen());
red=new JMenuItem("Redo");
red.setToolTipText("Redo.");
red.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_MASK ));
edit.add(red);
red.addActionListener(new actListen());
mb.add(edit);
find=new JMenuItem("Find");
search.add(find);
find.setIcon(new ImageIcon("./images/find.gif"));
find.addActionListener(new actListen());
replace=new JMenuItem("Replace");
search.add(replace);
replace.setIcon(new ImageIcon("./images/replace.gif"));
replace.addActionListener(new actListen());
mb.add(search);
JMenuItem tar_file=new JMenuItem("Create Archive");
tools.add(tar_file);
tar_file.addActionListener(new actListen());
JMenuItem docu=new JMenuItem("Create Documentation");
tools.add(docu);
docu.addActionListener(new actListen());
JMenuItem comment=new JMenuItem("Comment");
comment.setToolTipText("Comment Selection.");
tools.add(comment);
comment.addActionListener(new actListen());
bookmark=new JMenuItem("Bookmark");
tools.add(bookmark);
bookmark.addActionListener(new actListen());
mb.add(tools);
compile=new JMenuItem("Compile");
compile.setToolTipText("Compile.");
compile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.ALT_MASK ));
make.add(compile);
compile.setIcon(new ImageIcon("./images/compile.gif"));
compile.addActionListener(new actListen());
runit=new JMenuItem("Run");
runit.setToolTipText("Run.");
runit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.ALT_MASK ));
make.add(runit);
runit.setIcon(new ImageIcon("./images/run.gif"));
runit.addActionListener(new actListen());
mb.add(make);
shortcut_list=new JMenuItem("Shortcut List");
help.add(shortcut_list);
shortcut_list.addActionListener(new actListen());
about=new JMenuItem("About");
help.add(about);
about.addActionListener(new actListen());
mb.add(help);
//Register with document listener.
t.getDocument().addDocumentListener(new docListen());
// Register with Undo Listener
t.getDocument().addUndoableEditListener(new UndoHandler());
//Register with Keyboard listener
t.addKeyListener(new keyListen());
JScrollPane scrollpane=new JScrollPane(t);
Container cont=getContentPane();
cont.add(scrollpane);
validate();
}/* End of addmenu */
/* Frame for displaying console outputs */
public class MessageWindow extends JFrame
JTextArea jt;
public MessageWindow(String title)
super(title);
setSize(400,400);
//setIcon(new ImageIcon("./images/icon.gif"));
jt =new JTextArea();
jt.setEditable(false);
JScrollPane scroll=new JScrollPane(jt);
getContentPane().add(scroll);
jt.addKeyListener(new keyListen());
jt.addMouseListener(new mouseListen());
validate();
}//End of console display class
/* Frame for displaying progress bar during an operation */
public class displayProgress extends JFrame
JLabel jl;
public displayProgress(String title)
super(title);
setSize(300,100);
setResizable(false);
removeNotify();
Dimension dim=getToolkit().getScreenSize();
setLocation(dim.width/2-getWidth()/2,dim.height/2-getHeight()/2);
getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER,8,30));
jl=new JLabel("Lines Loaded : ");
progress = new JProgressBar();
progress.setMinimum(0);
progress.setMaximum(45);
getContentPane().add(jl);
getContentPane().add(progress);
validate();
}//End of progress display.
public void addNew() // To add a new Book Mark
String selectedText=t.getSelectedText();
if(selectedText!=null)
jb.addItem(selectedText);
jb.showPopup();
output.setText("Bookmark added.");
public void remove() // To remove a Bookmark
jb.removeAllItems();
/* Book Mark Handler*/
class bookListen implements ActionListener
public void actionPerformed(ActionEvent ae)
String search=(String)jb.getSelectedItem();
if(search!=null)
findString(search);
}//End of class
// Undo Handler
class UndoHandler implements UndoableEditListener
     public void undoableEditHappened(UndoableEditEvent e)
          undo.addEdit(e.getEdit());
}// undo handler
public class keyListen extends KeyAdapter
KeyStroke ks;
public void keyPressed(KeyEvent ke)
try
ks=KeyStroke.getKeyStrokeForEvent(ke);
String s1=KeyEvent.getKeyModifiersText(ks.getModifiers()); //s1 has modifiers like Ctrl+Alt
String s2=KeyEvent.getKeyText(ks.getKeyCode()); //s2 has key like 'a'
if(s2.equals("Up") || s2.equals("Down") || s2.equals("Left") || s2.equals("Right"))
int chcount=t.getCaretPosition();
int linecount=t.getLineOfOffset(chcount)+1;
output.setText("Character count : "+chcount+" Line Number : "+linecount);
boolean flag=true;
String search;
     if(s1.equals("Ctrl+Shift")) // Required
          output.setText("Looking for Macro ...");          
          if(s2.equals("S"))
          t.insert("\tSystem.out.println(\"\");",t.getCaretPosition());
          output.setText("Macro : Insert System.out.println() method.");          
          else if(s2.equals("C")) // Create a default constructor
          if(file.equals("Untitled"))
          flag=save_doc_as();
          if(flag)
          int pos_dot=file.indexOf('.');
          char class_name[]=file.toCharArray();
          String class_name_string=new String(class_name,0,pos_dot);
          t.insert("public "+class_name_string+"()\n\t{\n\n\t}",t.getCaretPosition());
          output.setText("Macro : Insert Default Constructor.");          
          else if(s2.equals("M"))
          t.insert("\tpublic static void main(String arg[])\n\t{\n\n\t}",t.getCaretPosition());
          output.setText("Macro : Insert Main method.");          
          else if(s2.equals("T"))
          t.insert("try\n{\n\n}\n\ncatch(Exception e)\n{\n\te.printStackTrace();\n}",t.getCaretPosition());
          output.setText("Macro : Insert try-catch block.");                              }
     }// Macro check end ctrl+alt
     // Additional check using only alt.
     else if(s1.equals("Alt"))
          if(s2.equals("F"))
          search=mw.jt.getSelectedText();
          if(search!=null)
          findString(search);
     } // Alt check
}//try
catch(Exception e)
     output.setText("Cannot find the Error Region.");
}// Function end
}/* End of Keylisten */
public void findString(String search)
try
boolean found=false;
          String lineToFind=search;
          if(lineToFind==null)
          return;
          for(int i=0;i<t.getLineCount();i++)
          int offset=t.getLineStartOffset(i);
          String lineInArea=t.getText(offset,lineToFind.length());
          output.setText("Currently Looking ... "+lineInArea);
          if(lineInArea.equals(lineToFind))
          t.requestFocus();
          t.select(offset,offset+lineToFind.length());
          output.setText("Required Line Detected.");
          found=true;
          break;
          }//for loop
          if(found==false)
          output.setText("Cannot find Required Line.");
          found=false;
catch(BadLocationException be)
     output.setText("Cannot find the Error Region.");
}// end of find error.
//Window Listener
public class Winlis extends WindowAdapter
public void windowClosing(WindowEvent we)
askexit();
//Document Listener
public class docListen implements DocumentListener
public void changedUpdate(DocumentEvent de)
try
char_changed=1;
setTitle(file+" <changed> - JCompile");
//setIcon(new ImageIcon("./images/save.gif");
int chcount=t.getCaretPosition();
int linecount=t.getLineOfOffset(chcount)+1;
output.setText("Character count : "+chcount+" Line Number : "+linecount);
catch(BadLocationException be)
output.setText("Character count : "+t.getCaretPosition());
public void insertUpdate(DocumentEvent de)
try
char_changed=1;
setTitle(file+" <changed> - JCompile");
//setIcon(new ImageIcon("./images/save.gif");
int chcount=t.getCaretPosition();
int linecount=t.getLineOfOffset(chcount)+1;
output.setText("Character count : "+chcount+" Line Number : "+linecount);
catch(BadLocationException be)
output.setText("Character count : "+t.getCaretPosition());
public void removeUpdate(DocumentEvent de)
try
char_changed=1;
setTitle(file+" <changed> - JCompile");
//setIcon(new ImageIcon("./images/save.gif");
int chcount=t.getCaretPosition();
int linecount=t.getLineOfOffset(chcount)+1;
output.setText("Character count : "+chcount+" Line Number : "+linecount);
catch(BadLocationException be)
output.setText("Character count : "+t.getCaretPosition());
}//Document Listener
// Action Listener
public class actListen implements ActionListener
//Action listener
public void actionPerformed(ActionEvent ae)
String str=(String)ae.getActionCommand();
int command_number=0;
for(int i=0;i<20;i++)
if(str.equals(menucomm[i]))
command_number=i;
break;
switch(command_number)
     case 0:
     if(char_changed==1)
     int ch=JOptionPane.showOptionDialog(null,"Save Changes you made to "+file+" ?","Confirm",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE,null,null,null);
     if(ch==0)
     save_doc();     
     t.setText("");
     char_changed=0;
     setTitle("Untitled");
     file="Untitled";
     remove();
     undo.discardAllEdits();
     break;
     case 1:
     //open_doc();
     int ch=2;
     if(char_changed==1)
     ch=JOptionPane.showOptionDialog(null,"Save Changes you made to "+file+" ?","Confirm",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE,null,null,null);
          if(ch==0)
          save_doc_as();
     t.setText("");
     FileDialog fd=new FileDialog(jc,"Open a file",FileDialog.LOAD);
     fd.setVisible(true);
     file=fd.getFile();
     // Support for class files also
     int pos_dot=file.indexOf('.');
     ext=file.substring(pos_dot+1,file.length());
     if(ext.equalsIgnoreCase("class")) // it is a class file
     try
     Runtime r=Runtime.getRuntime();
     String comm="jad.exe -s .java "+file;
     r.exec(comm);
     file=file.substring(0,pos_dot)+".java";
     catch(Exception e)
     output.setText("Some error has occured in Decompiling the class file.");
     Dir=fd.getDirectory();
     if(file!=null)
     Thread ofile=new openFile();
     ofile.start();
     dp.setVisible(false);
     remove();
     break;
     case 2:
     // Save
     save_doc();
     break;
     case 3:
     save_doc_as();
     break;     
     case 4:
     // Exit
     askexit();
     break;
     case 5:
     t.cut();
     break;
     case 6:
     t.copy();
     break;
     case 7:
     t.paste();
     break;
     case 8:
     t.selectAll();
     break;
     case 9: //comment
     String otext=t.getSelectedText();
     if(otext!=null)
     String ntext="/*\n"+otext+"\n*/";
     t.replaceSelection(ntext);
     break;
     case 10:
     if(char_changed==1)
     save_doc();
     output.setText("Compiling "+file+" ...");
     compileit();
     break;
     case 11:
     if(char_changed==1)
     compileit();
     if(file.equals("Untitled"))
     save_doc_as();
     compileit();
     else
     output.setText("Executing "+file+" ...");
     run_program();
     break;
     case 12: //about
     JOptionPane.showMessageDialog(null, "Jcom - IDE for Java beta 1.0.\nVisit www.geocities.com/prabhus14 for updates.", "About",JOptionPane. INFORMATION_MESSAGE);           
     break;
     case 13: //Short Cut List
     mw.setVisible(true);
mw.setTitle("Shortcut keys List.");
     mw.jt.setText("Shortcut Keys for Jcom.\nRight now only some of them are implemented.\nIn later versions users can customise these keys(called \"macros\" in Jcom) and can also add new ones!");
     mw.jt.append("\nMacros begin with Ctrl+Shift or Alt alone.\n\n");
     mw.jt.append("Ctrl+Shift+S\tTo insert System.out.println() method.\n");
     mw.jt.append("Ctrl+Shift+C\tTo create the default constructor for your class.\n");
     mw.jt.append("Ctrl+Shift+M\tTo insert main() method.\n");
     mw.jt.append("Ctrl+Shift+T\tTo insert try-catch block.\n");
     mw.jt.append("\nThe following macro is quite different and will differentiate Jcom from any other IDE.\n");
     mw.jt.append("\nAfter compiling if you get any errors then the console window will automatically appear with the messages.\n");     
     mw.jt.append("1. Select the line in the Error Message.(using mouse of course)\n");
     mw.jt.append("2. Press Alt+F or Right Click.\n");
     mw.jt.append("3. You will see the Error Region selected in your code.\n");
     mw.jt.append("Remember you must select right from the beginning of the line.\nRead Readme.html for more guidance.\n");     
     break;
     case 14:
     if(undo.canUndo())
          undo.undo();
          output.setText(undo.getUndoPresentationName());
     break;
     case 15:
     if(undo.canRedo())
          undo.redo();
          output.setText(undo.getRedoPresentationName());
     break;
     case 16: //Bookmark
     addNew();
     break;
}/*End of action listener*/
}//Action Listener
// Mouse Listener
class mouseListen extends MouseAdapter
String search;
public void mouseClicked(MouseEvent me)
String vers = System.getProperty("java.version");
if(vers.compareTo("1.1.2")>0)
if(me.getButton()==3)
     search=mw.jt.getSelectedText();
     if(search!=null)
     findString(search);
}//mouse listener
// A thread for opening file.
protected class openFile extends Thread
openFile()
setPriority(7);
public void run()
try
     int count=0;
     File fil1=new File(Dir,file);
     dp.setVisible(true);
     int factor=(int)fil1.length()/45;
     int i=1;
     FileInputStream textfile=new FileInputStream(fil1);
     DataInputStream dai=new DataInputStream(textfile);
     String S=dai.readLine();
     count+=S.length();
     dp.jl.setText("Lines Loaded : "+i++);
     if(ext.equals("class"))
     t.setText("/* Jcom - IDE for Java.\nVisit www.geocities.com/prabhus14 for updates.\n*/\n");
     while(S != null)
     if(ext.equals("class"))
     if(i>5)
     t.append(S+"\n");
     else
     t.append(S+"\n");
     S=dai.readLine();
     count+=S.length();
     progress.setValue((int)count/factor);
     dp.jl.setText("Lines Loaded : "+i++);
     }//while
     progress.setValue(45);
     dp.setVisible(false);
     setTitle(file+" - JCompile");
     catch(Exception ie)
     dp.setVisible(false);
output.setText(file+" Total lines : "+t.getLineCount());
return;
}//End of run
}//End of thread     
// A class simulating Status Bar
class StatusBar extends JComponent
public StatusBar()
     super();
     setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
public void paint(Graphics g)
super.paint(g);
}//End of class StatusBar
}/*End of class Jcom*/

Answer 1

Hmm well my first reply didn't seem to make it.
I would recommend Castor if you are talking about supporting XML to save your Java Objects. Castor is a great XML-Java data binding tool that I personally love. You can just write a map between the XML and java elements and it can marshal and unmarshal for you. JAXB (Java API fo XML Binding) can do the same thing but you have to build the classes from a schema you can't just supply a map for it (so you might have to rework your classes). If you mean that you want to edit XML directly in the IDE then you might want to look at the DOM (Document Object Model), its memory intensive though.