java clone方法

日历类clone()方法 (Calendar Class clone() method)

• clone() method is available in java.util package.

  clone()方法在java.util包中可用。

• clone() method is used to return the cloned object of this Calendar object.

  clone()方法用于返回此Calendar对象的克隆对象。

• clone() method is a non-static method, it is accessible with the class object and if we try to access the method with the class name then we will get an error.

  clone()方法是一种非静态方法，可通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• clone() method does not throw an exception at the time of cloning Calendar object.

  在克隆Calendar对象时， clone()方法不会引发异常。

Syntax:

句法：

    public Object clone();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

In both the cases, the return type of the method is Object, it returns a copy to this object.

在这两种情况下，方法的返回类型均为Object ，它将返回此对象的副本。

Example:

例：

// Java Program to demonstrate the example of
// Object clone() method of Calendar
import java.util.*;
public class CloneOfCalendar {
public static void main(String[] args) {
// Instantiating two Calendar object
Calendar curr_ca = Calendar.getInstance();
Calendar clo_ca;
// Display current calendar
System.out.println("curr_ca: " + curr_ca.getTime());
// By using clone() method is to copy the
// object to another 
clo_ca = (Calendar) curr_ca.clone();
// Display cloned calendar
System.out.println("curr_ca.clone(): " + clo_ca.getTime());
}
}

Output

输出量

curr_ca: Thu Jan 23 11:42:29 GMT 2020
curr_ca.clone(): Thu Jan 23 11:42:29 GMT 2020

翻译自: https://www.includehelp.com/java/calendar-clone-method-with-example.aspx

java clone方法