How can I simulate a JTextArea as a text console output?

[kosmos890]

Sorry for my bad English.

I want to show a large text (more than 6000 lines).
I used setText(String str) and setDocument(Doument doc) methods .
I call these methods from a SwingWorker or SwingUtilities.invokeLater but GUI is frozen.

I'm looking for a way to show the text gradually so the GUI is responsive and the user can stop the process.
Thanks in advance.

[eRaaaa]

setText ? How do you generate the (600 lines) string?
Why you don`t use the append method from the JTextArea?

[kosmos890]

@eRaaaa
Thanks for your reply.
I want to make a Web Extractor with Jsoup Library.
I parse a Html document from the web and then I use select(String jquery) method.

import java.io.IOException;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.openide.util.Exceptions;

public class JSoupDemo {

    public static void main(String[] args) {

        Document doc = null;
        String url = "http://www.java-forums.org/awt-swing/68936-how-can-i-simulate-jtextarea-text-console-output.html";
        int counter = 0;
        StringBuilder sb = new StringBuilder();
        String result;

        try {
            doc = Jsoup.connect(url).get();

        } catch (IOException ex) {
            Exceptions.printStackTrace(ex);
        }

        //This is the worst case
        Elements elements = doc.select("*");

        //A usefull jquery 
        // elements=doc.select("a");
        // Matched elements may include this element, or any of its children
        System.out.println(elements.size()); // 879 Elements

        for (Element elem : elements) {
            sb.append("\n\n(").append(++(counter)).append(")");
            sb.append("\n").append(elem.toString());
        }

        result = sb.toString();
        System.out.println(result);
    }
}

The code above is a console demo of how I have so many lines.
For my GUI I use Document and JEditorPane.
To improve performance of big texts showing in JEditorPane I also read :
JavaTechniques » Faster JTextPane Text Insertion (Part I)
Slow JEditorPane/JTextPane and performance improvements.