GregorianCalenda

一、     GregorianCalenda

Calendar c1 =new GregorianCalendar();

           c1.set(2016, Calendar.JULY, 2, 9, 9,9);//对应一个long类型的数

           Date date = c1.getTime();

           System.out.println(date);

           Calendar c2 = newGregorianCalendar();

           c2.set(Calendar.YEAR, 2022);

           c2.set(Calendar.MONTH, 7);

           date = c2.getTime();

           System.out.println(date);

           //日期计算

           c2.add(Calendar.YEAR, 30);//增加了30年

           date = c2.getTime();

           System.out.println(date);