Java 中的 DateFormat clone()方法，示例

原文:https://www . geesforgeks . org/dateform-clone-method-in-Java-with-examples/

日期格式类的克隆()方法用于创建该日期格式的副本。它会创建此日期格式的另一个副本。

语法:

public Object clone()

参数:该方法不取任何参数。

返回值:该方法返回日期格式的副本。

下面的程序说明了克隆()的工作方法日期格式: 示例 1:

// Java to illustrate clone() method

import java.text.*;
import java.util.*;

public class DateFormat_Demo {
    public static void main(String[] args)
    {
        // Initializing DateFormat
        DateFormat DFormat
            = DateFormat.getDateTimeInstance();

        // Displaying the formats
        Date date = new Date();
        String str_Date1
            = DFormat.format(date);
        System.out.println("The Original: "
                           + (str_Date1));

        // Using clone()
        System.out.println("Is the clone equal? "
                           + DFormat.clone()
                                 .equals(DFormat));
    }
}

Output:

The Original: Mar 27, 2019 10:09:48 AM
Is the clone equal? true

例 2:

// Java to illustrate clone() method

import java.text.*;
import java.util.*;

public class DateFormat_Demo {
    public static void main(String[] args)
    {
        // Initializing DateFormat
        DateFormat DFormat
            = new SimpleDateFormat("MM/dd/yyyy");

        // Displaying the formats
        Date date = new Date();
        String str_Date1
            = DFormat.format(date);
        System.out.println("The Original: "
                           + (str_Date1));

        // Using clone()
        System.out.println("Is the clone equal? "
                           + DFormat.clone()
                                 .equals(DFormat));
    }
}

Output:

The Original: 03/27/2019
Is the clone equal? true

参考:https://docs . Oracle . com/javase/7/docs/API/Java/text/dateformat . html # clone()

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