🚀 go-pugleaf

Hello,
Who says me how can i show the first line of my text in a JTextPane with a
JSCrollPane.
When i insert all text from a text file, only the last lines  appear and i
am obliged to scroll up.
I wish that the first line appear and then scolling down.
An other question. How can i justify my text because:

DefaultStyledDocument doc = new  DefaultStyledDocument();
JTextPane textPane = new JTextPane(doc);
textPane.setEditable(false);
JScrollPane  jSp = new JScrollPane(textPane);
textPane.setStyledDocument(doc);
 SimpleAttributeSet attr = new SimpleAttributeSet();
 ...............................

StyleConstants.setAlignment(attr,StyleConstants.ParagraphConstants.ALIGN_CEN
TER);
don't work
Thank you
JP BALLET