Adding text to a RTF document

Question

I'm reposting this because my last post was very poorly written. I have a JTextPane that uses a RTF editor kit, and what I want to do is add some text to the very beginning and end of the document with out losing the formatting of the RTF. What I do now is get a string from the Editor Kit that is RTF text but I can't just add to the front because of the formatting there, {rtf and all that jazz. What I do is use the getText() function to get just the unformatted text, then get the first 10 chars, and then search for that in the RTF string, and insert text there. It seems to be a bit of a crude way to go about it; even so I would be fine with it if it didn't fail with non-English characters. (You know like the French e with the accent or the German u with the 2 dots). So what I�m looking for is some sort of way to insert the text programmatically eliminating the need for searching and all that. Any help will be greatly appreciated.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

Forgive me if you know this already but I'd like to offer what I can...
The JTextComponent (and it's subclasses) makes use of a Document for a lot of its Model. If you haven't set a different one explicitly, then the RTFEditorKit will see that an appropriate StyledDocument is used on your JTextPane. The Document interface allows for raw text (without markup, formatting, etc) to be mutated with optional formatting attributes (inserts, replaces, etc.).
I think what you are looking for lies in the Document of the JTextPane. The getDocument() method will return the Document holding the text and can be mutated at will (either by typing into the component or programmatically inserting text).
When you call getText() on your text component, the call is delegated to the installed editor kit and returns the contents. The text component calls the write( Writer, .... ) on the EditorKit but the RTFEditorKit actually should throw an exception and cause null to be returned from the getText() method of JEditorPane. To get the marked up, rtf text you would need to call the write( OutputStream, ... ) method.
Here is programmatic insertion at the beginning and end...
    JTextPane textPane = new JTextPane();
    textPane.setEditorKit( new RTFEditorKit() );
    //pretend we've grabbed an rtf file and set it's contents with the setText() method.
    Document doc = textPane.getDocument();
    try{      
        doc.insertString( 0, "begin", null );
        doc.insertString( doc.getLength(), "end", null );
    }catch( BadLocationException ex ){
        //what ever you need to do
    //now of course to get the rtf formatted string out of the editor kit
    //you need to write it to an OutputStream (i.e. System.out, a FileOutputStream, etc.)
    try{
        textPane.getEditorKit().write( System.out, doc, 0, doc.getLength() );
    }catch( BadLocationException ex ){
        //what ever you need to do
    }catch( IOException ex ){
        //what ever you need to do
    }I didn't pass any formatting attributes into the calls of the insertString method but you could easily do that if you need to.
Hope that helps!
Matt