Java中的DateFormat類的setCalendar()方法用於設置與此日期/時間格式對象關聯的日曆。在初始階段,將使用日曆的默認設置以及默認語言環境。
用法:
public void setCalendar(Calendar new_calendar)
參數:該方法采用Calendar類型的一個參數new_calendar,表示要替換原始DateFormat對象的新Calendar。
返回值:該方法不返回任何值。
以下程序說明了Java中setCalendar()方法的用法:
示例1:
// Java code to illustrate
// setCalendar() 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("Original Calendar: "
+ DFormat.getCalendar());
// Creating a calendar
Calendar calndr = Calendar.getInstance();
// Replacing with a new value
calndr.set(Calendar.MONTH, 11);
// Setting new Calendar
DFormat.setCalendar(calndr);
System.out.println();
// Displaying the newCalendar
System.out.println("New Calendar: "
+ DFormat.getCalendar());
}
}
輸出:
Original Calendar: java.util.GregorianCalendar[time=1553847137520, 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=29, DAY_OF_YEAR=88, DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8, HOUR_OF_DAY=8, MINUTE=12, SECOND=17, MILLISECOND=520, ZONE_OFFSET=0, DST_OFFSET=0] New Calendar: java.util.GregorianCalendar[time=?, areFieldsSet=false, 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=11, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5, DAY_OF_MONTH=29, DAY_OF_YEAR=88, DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8, HOUR_OF_DAY=8, MINUTE=12, SECOND=17, MILLISECOND=521, ZONE_OFFSET=0, DST_OFFSET=0]
示例2:
// Java code to illustrate
// setCalendar() method
import java.text.*;
import java.util.*;
public class DateFormat_Demo {
public static void main(String[] argv)
{
// Initializing the first formatter
DateFormat DFormat
= DateFormat.getDateInstance();
// String formatting
String str = DFormat.format(new Date());
// Displaying the Calendar
System.out.println("Original Calendar: "
+ DFormat.getCalendar());
// Creating a calendar
Calendar calndr = Calendar.getInstance();
// Replacing with a new value
calndr.set(Calendar.YEAR, 1996);
// Setting new Calendar
DFormat.setCalendar(calndr);
System.out.println();
// Displaying the newCalendar
System.out.println("New Calendar: "
+ DFormat.getCalendar());
}
}
輸出:
Original Calendar: java.util.GregorianCalendar[time=1553847144311, 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=29, DAY_OF_YEAR=88, DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8, HOUR_OF_DAY=8, MINUTE=12, SECOND=24, MILLISECOND=311, ZONE_OFFSET=0, DST_OFFSET=0] New Calendar: java.util.GregorianCalendar[time=?, areFieldsSet=false, 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=1996, MONTH=2, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5, DAY_OF_MONTH=29, DAY_OF_YEAR=88, DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8, HOUR_OF_DAY=8, MINUTE=12, SECOND=24, MILLISECOND=318, ZONE_OFFSET=0, DST_OFFSET=0]
參考: https://docs.oracle.com/javase/7/docs/api/java/text/DateFormat.html#setCalendar(java.util.Calendar)
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注:本文由純淨天空篩選整理自Chinmoy Lenka大神的英文原創作品 DateFormat setCalendar() Method in Java with Examples。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。