Canlendar 日期类

Canlendar的构造方法

canlendar 是一个抽象类，通过getInstance获取子类的对象(多态)

Calendar calendar = Calendar.getInstance();

Canlendar的get和set方法

GET

canlendar中的静态常量

 public static final int YEAR = 1;
 public static final int WEEK_OF_YEAR = 3;
 public static final int WEEK_OF_MONTH = 4;
 public static final int DATE = 5;
 public static final int DAY_OF_MONTH = 5;
 public static final int DAY_OF_YEAR = 6;
 public static final int DAY_OF_WEEK = 7;
 ....

canlendar的get方法field对应静态常量的值

public int get(int field);

canlendar的set方法

public class CanlenderDemo {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();// 通过getInstance获取日历对象
        System.out.println(calendar);
        calendar.get(Calendar.YEAR);
        calendar.get(Calendar.MONTH);
        calendar.get(Calendar.DATE);
        calendar.set(Calendar.YEAR,2000);
        calendar.set(2020,1,10);
    }
}