Java中的 DateFormat getCalendar() 方法及示例

Java中DateFormat 类的getCalendar()方法用于获取与此日期/时间格式对象关联的日历。

句法：

public Calendar getCalendar()

参数：该方法不带任何参数。

返回值：该方法返回此 DateFormat 对象的 Calendar 实例。

下面的程序说明了在Java中使用 getCalendar() 方法：
示例 1：

// Java code to illustrate
// getCalendar() method
  
import java.text.*;
import java.util.*;
  
public class DateFormat_Demo {
    public static void main(String[] argv)
    {
        // Initializing the first formatter
        DateFormat DFormat
            = DateFormat.getDateTimeInstance();
  
        // String formatting
        String str = DFormat.format(new Date());
  
        // Displaying the Calendar
        System.out.println(DFormat.getCalendar());
    }
}

输出：

java.util.GregorianCalendar[time=1553691245240, areFieldsSet=true, areAllFieldsSet=true,
lenient=true, zone=sun.util.calendar.ZoneInfo[id="Etc/UTC", offset=0, dstSavings=0,
useDaylight=false, transitions=0, lastRule=null], firstDayOfWeek=1, minimalDaysInFirstWeek=1,
ERA=1, YEAR=2019, MONTH=2, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5, DAY_OF_MONTH=27, DAY_OF_YEAR=86,
DAY_OF_WEEK=4, DAY_OF_WEEK_IN_MONTH=4, AM_PM=1, HOUR=0, HOUR_OF_DAY=12, MINUTE=54, SECOND=5,
MILLISECOND=240, ZONE_OFFSET=0, DST_OFFSET=0]

示例 2：

// Java code to illustrate
// getCalendar() method
  
import java.text.*;
import java.util.*;
  
public class DateFormat_Demo {
    public static void main(String[] argv)
    {
        // Initializing the first formatter
        DateFormat DFormat
            = new SimpleDateFormat("MM/ dd/ yy");
  
        // String formatting
        String str = DFormat.format(new Date());
  
        // Displaying the Calendar
        System.out.println(DFormat.getCalendar());
    }
}

输出：

java.util.GregorianCalendar[time=1553691264669, areFieldsSet=true, areAllFieldsSet=true,
lenient=true, zone=sun.util.calendar.ZoneInfo[id="Etc/UTC", offset=0, dstSavings=0,
useDaylight=false, transitions=0, lastRule=null], firstDayOfWeek=1, minimalDaysInFirstWeek=1,
ERA=1, YEAR=2019, MONTH=2, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5, DAY_OF_MONTH=27, DAY_OF_YEAR=86,
DAY_OF_WEEK=4, DAY_OF_WEEK_IN_MONTH=4, AM_PM=1, HOUR=0, HOUR_OF_DAY=12, MINUTE=54, SECOND=24,
MILLISECOND=669, ZONE_OFFSET=0, DST_OFFSET=0]

参考： https: Java/text/DateFormat.html#getCalendar()