In the code below I would like to write onto JEditorPane the numbers 0 to 10000. However, the JEditorPane does not display anything unless either it is completely done ( printing all 0 to 10000 at once) or when the os gives it time to refresh and display the contents. Either case, the application becomes unresponsive for a while that the user thinks the application has crashed. Is there anyway we can force the jEditorPane to display the updated contents, even if it is still busy ? I tried invokeAndWait but does not help here as we cannot call invokeAndWait from the event dispatcher thread.

In other words, if I replace the `Thread.sleep(0)` with `Thread.sleep(50)`, it works fine and displays the print of results as they happen, but adding the 50 mill sec delay makes it extremely slow. all I want is to update the JEditorPane from time to time so that the user does not think the application crashed. **I prefer to only modify the updateMessages().**
Here is my code:

```
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.text.Document;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.StyleSheet;

public class CMessageWindowStack {

    private static final String MESSAGE = "msg";
    private  JScrollPane scrollPane;
    public  JEditorPane  editorPane;
    private  HTMLEditorKit kit;
    private  String msgBuffer=new String("");
    private static CMessageWindowStack window=null;
    private static JFrame frameContainer=null;

    private CMessageWindowStack()
    {
        editorPane  = new JEditorPane ();
        editorPane.setEditable(false);
        editorPane.setContentType("text/html");
        kit = new HTMLEditorKit();
        editorPane.setEditorKit(kit);

        StyleSheet styleSheet = kit.getStyleSheet();
        styleSheet.addRule("."+MESSAGE+" {font: 10px monaco; color: black; }");

        Document doc = kit.createDefaultDocument();
        editorPane.setDocument(doc);
        scrollPane = new JScrollPane(editorPane);
    }
    public static CMessageWindowStack getInstance(){
        if (null==window)
        {window=new CMessageWindowStack();}
        return window;
    }
/**
 * The core
 * @param sMessage
 * @param sType
 */
    private void updateMessages(final String sMessage, final String sType)

    {
        SwingUtilities.invokeLater( new Runnable() {
             public void run() {

        String sMessageHTML=""; 
        String sTypeText="";
        if (!sMessage.equals("\r\n")){ 
            sTypeText = sType+": ";
        }

        sMessageHTML = sMessage.replaceAll("(\r\n|\n)", "<br/>");
        if (!sMessageHTML.equals("<br/>")) 
        {
            sMessageHTML =   "<SPAN CLASS="+sType+">"+ sTypeText+sMessageHTML + "</SPAN>";
        }

        msgBuffer=msgBuffer.concat( sMessageHTML);
        editorPane.setText(msgBuffer);
        if ((editorPane.getDocument()).getLength()>1){
            editorPane.setCaretPosition((editorPane.getDocument()).getLength()-1);
        }  
             }
          });
    }

    public void setContainerFrame(JFrame jFrame){
        frameContainer = jFrame;
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(frameContainer.getContentPane());
        frameContainer.getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(scrollPane)
                );
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                        .addComponent(scrollPane, javax.swing.GroupLayout.DEFAULT_SIZE, 217, Short.MAX_VALUE))
                );
    }

    public void setVisible(boolean bVisible){
        editorPane.setVisible(bVisible);
        scrollPane.setVisible(bVisible);
    }

    public void printMsg(String sMessage){
        String sType = MESSAGE;
        updateMessages(sMessage,sType);
    }

    public void printlnMsg(String sMessage){
        sMessage=sMessage.concat("\r\n");
        printMsg(sMessage);
    }

    public static void main(String args[]){
        CMessageWindowStack m_LogMgr;
        JFrame frame = new JFrame();
        m_LogMgr=CMessageWindowStack.getInstance();
        m_LogMgr.setContainerFrame(frame);
        frame.setVisible(true);
        frame.setSize(500, 500);

        for(int i=0;i<10000;++i){
            try {
                Thread.sleep(0);//becomes unresponsive if sleep(0)
            } catch (Exception e) {
            }
            m_LogMgr.printlnMsg(i+"-----------------------");
        }

    }

}

```