Document doc = (Document) editorPane.getDocument();
		Element e = doc.getDefaultRootElement();
		// Copy attribute Set
		AttributeSet attr = e.getAttributes().copyAttributes();
		dbg("-- attr = " + attr );
		dbg("-- length = " + doc.getLength() );
		doc.insertString(doc.getLength(), "Naam", attr);

For exampe:


public void setErrorURL(String newValue, Exception e) {
	this.errorURL = newValue;
	try {
		getEditorPane().setPage(getErrorPath() + newValue);
		try {
			Document doc = (Document) getEditorPane().getDocument();
			// Copy attribute Set
			AttributeSet attr = ((HTMLEditorKit) getEditorPane().getEditorKit()).getInputAttributes();
			dbg("-- attr = " + attr);
			dbg("-- length = " + doc.getLength());
			
			doc.insertString(doc.getLength(), "Exception", null);
		} catch (Throwable bl) {
			dbg("-- " + bl.getMessage());
		}
	} catch (java.io.IOException ioe) {
		handleException(ioe);
	}
}