Methods to get current and past Months and name of them

UtilsExtensions.java

public static int getCurrentYear() {
        return Calendar.getInstance().get(Calendar.YEAR);
    }

    public static int[] getMonthsPos() {

        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.MONTH, 0);

        int month1 = new Timestamp(calendar.getTime().getTime()).getMonth();
        calendar.add(Calendar.MONTH, -1);
        int month2 = new Timestamp(calendar.getTime().getTime()).getMonth();
        calendar.add(Calendar.MONTH, -1);
        int month3 = new Timestamp(calendar.getTime().getTime()).getMonth();
        calendar.add(Calendar.MONTH, -1);
        int month4 = new Timestamp(calendar.getTime().getTime()).getMonth();

        return new int[]{month4, month3, month2, month1};
    }

    public static String[] getMonths() {

        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.MONTH, 0);

        int month1 = new Timestamp(calendar.getTime().getTime()).getMonth();
        calendar.add(Calendar.MONTH, -1);
        int month2 = new Timestamp(calendar.getTime().getTime()).getMonth();
        calendar.add(Calendar.MONTH, -1);
        int month3 = new Timestamp(calendar.getTime().getTime()).getMonth();
        calendar.add(Calendar.MONTH, -1);
        int month4 = new Timestamp(calendar.getTime().getTime()).getMonth();

        return new String[]{getMonthForInt(month4), getMonthForInt(month3), getMonthForInt(month2), getMonthForInt(month1), "Todos"};
    }

    public static String getMonthForInt(int num) {
        String[] monthnames = {"Ene", "Feb", "Mar", "Abr", "May", "Jun", "Jul", "Ago", "Sep", "Oct", "Nov", "Dic"};
        return monthnames[num];
    }