Thread printerThread = new PrinterThread(screen,font,numCols,numRows,colorBg);
Thread printerThread = new PrinterThread(screen, font, numCols, numRows, colorBg, (Session)gui);
   public final void printMe() {      Thread printerThread = new PrinterThread(screen,font,numCols,numRows,colorBg);      printerThread.start();   }