倒序输出年月

SimpleDateFormat直接搞定了吧

public class test4 {
    private Calendar c =null;
    public test4(int year,int month,int date){
        c = new GregorianCalendar(); 
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH,month);
        c.set(Calendar.DATE, date);
    }
    public test4(int year,int month){
        c = new GregorianCalendar(); 
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DATE, 1);
    }
    public String getStrByDate(Date date){
        String fmt = "";
        fmt = "yyyy-MM-dd";
        SimpleDateFormat sdf = new SimpleDateFormat(fmt);
        String dateStr = sdf.format(date);
        return dateStr;
    }
    public String getStrByMonth(Date date){
        String fmt = "";
        fmt = "yyyy-MM";
        SimpleDateFormat sdf = new SimpleDateFormat(fmt);
        String dateStr = sdf.format(date);
        return dateStr;
    }
    public String getNextDay(int days) {
        c.add(Calendar.DATE,days*(-1));
        return this.getStrByDate(c.getTime());
    }
    public String getNextMonth(int months) {
        c.add(Calendar.MONTH,months*(-1));
        return this.getStrByMonth(c.getTime());
    }
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        test4 cdtest = new test4(2015,2);
        for(int i=0;i<12;i++){
            System.out.println(cdtest.getNextMonth(1));
        }
    }

}