如何在 Java 中使用 GregorianCalendar 类打印日期？

GregorianCalendar类支持标准日历，它支持儒略历和公历，您可以使用其构造函数之一创建 GregorianCalendar 对象。以下是演示如何使用此类打印日期的各种示例 -

示例

以下示例通过将年、月和日期值作为参数传递给其构造函数并打印日期来创建GregorianCalander -

import java.util.Calendar;
import java.util.GregorianCalendar;
public class Test {
   public static void main(String args[]){
      //实例化 GregorianCalendar
      GregorianCalendar cal = new GregorianCalendar(2018, 6, 27);
      System.out.println(cal);
      System.out.println("Date: "+cal.get(Calendar.DATE));
      System.out.println("Month: "+cal.get(Calendar.MONTH));
      System.out.println("Year: "+cal.get(Calendar.YEAR));
   }
}

输出结果

java.util.GregorianCalendar[time=?,areFieldsSet=false,areAllFieldsSet=false,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Calcutta",offset=19800000,dstSavings=0,useDaylight=false,transitions=7,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=?,YEAR=2018,MONTH=6,WEEK_OF_YEAR=?,WEEK_OF_MONTH=?,DAY_OF_MONTH=27,DAY_OF_YEAR=?,DAY_OF_WEEK=?,DAY_OF_WEEK_IN_MONTH=?,AM_PM=0,HOUR=0,HOUR_OF_DAY=0,MINUTE=0,SECOND=0,MILLISECOND=?,ZONE_OFFSET=?,DST_OFFSET=?]
Date: 27
Month: 6
Year: 2018

示例

以下示例通过将 Locale 对象作为参数传递给其构造函数来创建GregorianCalander并打印日期 -

import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Locale;
public class Test {
   public static void main(String args[]){    
Locale locale = new Locale("en", "IN");
      //实例化 GregorianCalendar  
GregorianCalendar cal = new GregorianCalendar(locale);
      System.out.println("Date: "+cal.get(Calendar.DATE));
      System.out.println("Month: "+cal.get(Calendar.MONTH));
      System.out.println("Year: "+cal.get(Calendar.YEAR));
   }
}

输出结果

Date: 7
Month: 10
Year: 2020

示例

以下示例通过将 TimeZone 对象作为参数传递给其构造函数并打印日期来创建 GregorianCalander -

import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.TimeZone;
public class Test {
   public static void main(String args[]){    
      TimeZone timeZone = TimeZone.getTimeZone("GMT+5:30");
      //实例化 GregorianCalendar  
      GregorianCalendar cal = new GregorianCalendar(timeZone);
      System.out.println("Date: "+cal.get(Calendar.DATE));
      System.out.println("Month: "+cal.get(Calendar.MONTH));
      System.out.println("Year: "+cal.get(Calendar.YEAR));
   }
}

输出结果

Date: 7
Month: 10
Year: 2020

示例

以下示例使用该方法创建GregorianCalandergetInstance()并打印日期 -

import java.util.Calendar;
import java.util.GregorianCalendar;
public class Test {
   public static void main(String args[]){    
      //实例化 GregorianCalendar  
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();
      System.out.println("Date: "+cal.get(Calendar.DATE));
      System.out.println("Month: "+cal.get(Calendar.MONTH));
      System.out.println("Year: "+cal.get(Calendar.YEAR));
   }
}

输出结果

Date: 7
Month: 10
Year: 2020