How to highlight HTML source code in JEditorPane

I used JEditorPane to display the HTML source code. Now I want to highlight some part of the HTML code.
e.g. change the font or color of the second line in this piece of HTML code.
I tried to highlight the text in HTML way, e.g.
JEditorPane jep=new JEditorPane():
jet.setContentType("text/html");
jet .setText("<html>display styled text</html>");
but it didn't work at all. As the text I want to highlight is alreay a part of the HTML code.
I have to sort it out ASAP. as the deadline of my project is coming...
any advice is appreciated.
Thanks so much..:)

"In order to display the original html source code (not the effect made by HTML code ) i n JEditorPane,
i can't use editorPane.setContentType("text/html"): As it will try to render the webpage with this piece of HTML code..
e.g. here is the piece of html code i want to display in JEditorPane:
<HTML><HEAD><TITLE>Department of Computer Science Home Page</TITLE>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2737.800" name=GENERATOR>
</HEAD>.........</HTML>
what i want to do is to highlight "Department of Computer Science Home Page" by setting it bold or italic."
Not really sure what you're saying here, but it sounds like you mean that you want the HTML itself to change. If that's it just:
<HTML>
<HEAD>
<TITLE>Department of Computer Science Home Page</TITLE>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2737.800" name=GENERATOR>
</HEAD>
<BODY color='blue' bgcolor='white'>
<tr>
<td bgcolor=yellow>Department of Computer Science Home Page</td>
</tr>
</BODY>
</HTML>FWIW HTH, B4N
~Bill

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