Java TimeZone clone()方法及示例

Java中 TimeZone类 的 clone() 方法是用来创建一个与现有TimeZone相同的副本。

语法

time_zone.clone()

参数： 该方法不接受任何参数。

返回值： 该方法返回一个TimeZone的实例，它是这个TimeZone的副本。

下面的程序说明了TimeZone的clone()方法的工作。

例1:

// Java code to illustrate clone() method
  
import java.util.*;
  
public class TimeZoneDemo {
    public static void main(String args[])
    {
  
        // Creating an object of TimeZone class.
        TimeZone time_zone
            = TimeZone.getDefault();
        System.out.println("Original TimeZone: "
                           + time_zone);
  
        System.out.println();
  
        // Cloning and displaying the time zone
        System.out.println("Cloned TimeZone: "
                           + time_zone.clone());
    }
}

输出:

Original TimeZone:
sun.util.calendar.ZoneInfo[id=”Etc/UTC”,offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]

Cloned TimeZone:
sun.util.calendar.ZoneInfo[id=”Etc/UTC”,offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]

例2:

// Java code to illustrate clone() method
  
import java.util.*;
  
public class TimeZoneDemo {
    public static void main(String args[])
    {
  
        // creating Timezone object whose id is Europe/Berlin
        TimeZone time_zone
            = TimeZone.getTimeZone("Europe/Berlin");
  
        System.out.println("Original TimeZone: "
                           + time_zone);
  
        System.out.println();
  
        // Cloning and displaying the time zone
        System.out.println("Cloned TimeZone: "
                           + time_zone.clone());
    }
}

输出:

Original TimeZone:
sun.util.calendar.ZoneInfo[id=”Europe/Berlin”,offset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]]

Cloned TimeZone:
sun.util.calendar.ZoneInfo[id=”Europe/Berlin”,offset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]]