日历创建对象:

  • Calendar类为抽象类,不可实例化
  • 方式一:
  • 父类引用指向类对象
  • Calendar  cal = new GregorianCalendar();
  • 方式二:
  • Calendar cal = Calendar.getInstance();

获取年,月,日,时,分,秒 ,毫秒 ,一年的第几天,一年的第几周,一个月的第几周,一周的第几天(周索引)
月:(0-11 ) 表示1-12月 ,周索引:(1-7) 表示的周日到周六 ,周日表示1,周一时2,以此类推,周六是7

    读出日历
     int
year = cal.get(Calendar.YEAR); int month = cal.get(Calendar.MONTH)+1; int date1 = cal.get(Calendar.DATE); int date2 = cal.get(Calendar.DAY_OF_MONTH); int hour1 = cal.get(Calendar.HOUR); int hour2 = cal.get(Calendar.HOUR_OF_DAY); int min = cal.get(Calendar.MINUTE); int sec = cal.get(Calendar.SECOND); //毫秒 int millSec = cal.get(Calendar.MILLISECOND); //一年的第几天 int dayIndex = cal.get(Calendar.DAY_OF_YEAR); //一年的第几周 int weekIndex = cal.get(Calendar.WEEK_OF_YEAR); //一个月的第几周 int weekIndex2 = cal.get(Calendar.WEEK_OF_MONTH); //一周的第几天 int weekIndex3 = cal.get(Calendar.DAY_OF_WEEK);

写入日历

cal.set(Calendar.YEAR, 2019);
cal.set(Calendar.MONTH, 9);
cal.set(Calendar.DATE, 28);
cal.set(Calendar.DAY_OF_MONTH, 28);

 

 

/**
 * 和Date之间的相互转换
 * Calendar---》Date  getTime()
 * Date --->Calendar  setTime()
 * @author Administrator
 *
 */
public class TestCalendar07 {
    public static void main(String[] args) {
        Calendar cal = new GregorianCalendar();

        Date date = cal.getTime();
        System.out.println("date对象:"+date);

        System.out.println("============================");
        Date date2 = new Date();
        cal.setTime(date2);
        System.out.println("日历对象:"+cal);
    }
}
01-12 04:59