java Calendar类

 

public class calendardemo {
    public static void main(string[] args) {
        date d = new date();
        simpledateformat sdf = new simpledateformat("yyyy");
        string year = sdf.format(d);
        system.out.println(year);

        calendar c = calendar.getinstance();
        //可以使用查表法月份查询
        system.out.println(c.get(calendar.year)+"年"+(c.get(calendar.month)+1)+"月"+c.get(calendar.day_of_month)+"日");
    }
}

public class calendardemo {
    public static void main(string[] args) {
        calendar c = calendar.getinstance();
        c.set(2012,2,23);
        system.out.println(c.get(calendar.year)+"年"+(c.get(calendar.month)+1)+"月"+c.get(calendar.day_of_month)+"日");
        c.add(calendar.year,-4);
        system.out.println(c.get(calendar.year)+"年"+(c.get(calendar.month)+1)+"月"+c.get(calendar.day_of_month)+"日");
    }
}