Java Calendar clone()用法及代码示例

Calendar类中的clear()方法用于克隆日历对象。它本质上会创建该对象的浅拷贝。

用法:

public Object clone()

参数：该方法不带任何参数。

返回值：该方法不返回任何值。

以下示例程序旨在说明Calendar类的clone()方法的用法：
示例1:

// Java Code to illustrate clone() Method 
  
import java.util.Calendar; 
  
public class CalendarClassDemo { 
    public static void main(String args[]) 
    { 
        // Creating a calendar object 
        Calendar calndr1 = Calendar.getInstance(); 
  
        // Displaying current calendar 
        System.out.println("Original calendar: "
                           + calndr1.getTime()); 
  
        // Cloning the original 
        Calendar calndr2 = (Calendar)calndr1.clone(); 
  
        // Displaying the Copy 
        System.out.println("Cloned calendar: "
                           + calndr2.getTime()); 
    } 
}

输出：

Original calendar: Tue Feb 12 11:41:36 UTC 2019
Cloned calendar: Tue Feb 12 11:41:36 UTC 2019

示例2:

// Java Code to illustrate clone() Method 
  
import java.util.*; 
  
public class CalendarClassDemo { 
    public static void main(String args[]) 
    { 
        // Creating a calendar object 
        Calendar calndr1 
            = new GregorianCalendar(2018, 12, 2); 
  
        // Displaying current calendar 
        System.out.println("Original calendar: "
                           + calndr1.getTime()); 
  
        // Cloning the original 
        Calendar calndr2 = (Calendar)calndr1.clone(); 
  
        // Displaying the Copy 
        System.out.println("Cloned calendar: "
                           + calndr2.getTime()); 
    } 
}

输出：

Original calendar: Wed Jan 02 00:00:00 UTC 2019
Cloned calendar: Wed Jan 02 00:00:00 UTC 2019

参考： https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html#clone()

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注：本文由纯净天空筛选整理自Chinmoy Lenka大神的英文原创作品 Calendar clone() Method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。