Problem in my StyledDocument...urgent Pls

Question

Hai,
I have a JFrame in which there is a toolbar and a tabbedPane containing 6 panels.Some panels have JTextPane in it.
The user may select any of the JTextPane and change its font ,style etc..
The toolbar contain buttons for Bold,Italics,color,etc.
First of all I have to detect the JTextPane in which the user make some changes.I did this with the help of an interface called "IEditorView",which has a method called
public JTextPane getSelectedPane();
I override this method in my class and there by I find the JTextPane.
Now I am able to make use of the method doc.remove(int off,int length);(doc is the StyledDocument)
But...when I tryied to insert something into my doc,exceptions arises..
Here is the Exception: ArrayIndexOutofBounds Exception.
and it gives a line no, where I find the method
setVisible(true); I am very sure that the index I have entered in the method doc.insertString(),is very correct .
Here I post my button's action class:
class FontAction implements ActionListener,ItemListener,IEditorView
    public JTextPane getSelectedPane()
        IEditorView view=(IEditorView) tabPane.getSelectedComponent();
        return (JTextPane)view.getSelectedPane();
    public void actionPerformed(ActionEvent e)
        JTextPane text=getSelectedPane();
        StyledDocument doc=text.getStyledDocument();
        SimpleAttributeSet set=new SimpleAttributeSet();
        int start=text.getSelectionStart();
        int end=text.getSelectionEnd();
        String selected=text.getSelectedText();
        if(e.getSource().equals(butt[0]))//Bold
                      try{
                    StyleConstants.setBold(set,true);
                    doc.remove(start,selected.length());
                    doc.insertString(start,selected,set);//I get exception here
                }catch(Exception e1){System.out.println(" EXCEPTION Inside 'Bold' button.....\n"+e1);}
        if(e.getSource().equals(butt[1]))//Italics
        if(e.getSource().equals(butt[2]))//UnderLine
        if(e.getSource().equals(butt[3]))//Strikeout
        if(e.getSource().equals(butt[5]))//Color
                JColorChooser cc = new JColorChooser();
                cc.showDialog(new JPanel(),"Color Bank",Color.black);
                cc.getSelectionModel().addChangeListener(
                new ChangeListener() {
                public void stateChanged(ChangeEvent e) {
    public void itemStateChanged(ItemEvent p1)
        if(p1.getSource().equals(combo[0]))//Font-family
        if(p1.getSource().equals(combo[1]))//font-size
}Please help me its URGENT......
Thanks & regards
N.A.Sasivarnan

Answer 1

Try to replace
doc.remove(start,selected.length());
doc.insertString(start,selected,set);
by
doc.setCharacterAttributes(start, end-start, set, true);
Hope this help