ayudaaaaaaaaaaaa porfavor

Question

hola quisiera ver si me  pudieran ayudar con una clase de java tengo esta clase donde calcula el primer dia de la semana de x mes

yo mando a imprimir esto

<pre lang='java'> System.out.println("gggg"+ himfg.clases.cFunciones.primerosDiasXmes(2012, 5));
                                                                    año   dia(jueves)

  public static HashMap<Integer, Integer> primerosDiasXmes(int year, int dia) throws ClassNotFoundException, SQLException {
        HashMap<Integer, Integer> hmdias = new HashMap<Integer, Integer>();
        String DATE_FORMAT = "yyyyMMdd";
        SimpleDateFormat sdf =
                new SimpleDateFormat(DATE_FORMAT);
        Calendar c1 = Calendar.getInstance(); // today
        for (int m = Calendar.JANUARY; m <= Calendar.DECEMBER; m++) {
            Calendar cal = new GregorianCalendar(year, m, 1);
            cal.set(Calendar.WEEK_OF_YEAR, cal.getActualMinimum(Calendar.WEEK_OF_YEAR));
            int diff = dia - cal.get(Calendar.DAY_OF_WEEK);
            //System.out.println("n"+diff);
            if (diff < 0) {
                diff += 7;
            }
            cal.add(Calendar.DAY_OF_MONTH, diff);

            System.out.println("**** '' " + sdf.format(cal.getTime())); //in (20110830,1521021)
            //System.out.println(sdf.format(c1.getTime()));

            hmdias.put(Integer.parseInt(sdf.format(cal.getTime())), Integer.parseInt(sdf.format(cal.getTime())));

        }

        return hmdias;
    }
y al final me imprime  20120202=20120202, 20120607=20120607, 20120405=20120405, 20120301=20120301, 20120802=20120802, 20120906=20120906, 20121101=20121101, 20120705=20120705, 20120105=20120105, 20121206=20121206, 20121004=20121004, 20120503=20120503}

ahora quiero obtener el primer dia jueves  y el tercer jueves del mes