java enummap_Java EnumMap clone（）方法与示例

「爱情、让人受尽委屈。」 2023-03-05 12:53 13阅读 0赞

java enummap

## EnumMap类clone()方法 **(**EnumMap 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 clone this enum map or in other words, we can say it returns a shallow copy of this enum map.
    
    **clone()方法**用于克隆此枚举图，换句话说，我们可以说它返回此枚举图的浅表副本。
 *  **clone() method** is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
    
    **clone()方法**是一个非静态方法，只能通过类对象访问，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 enum map.
    
    **clone()方法**在克隆枚举映射时不会引发异常。

**Syntax:**

**句法：**

public EnumMap clone();

**Parameter(s):**

**参数：**

*  It does not accept any parameter.
    
    它不接受任何参数。

**Return value:**

**返回值：**

The return type of this method is EnumMap, it returns a cloned copy of this enum map.

此方法的返回类型为EnumMap ，它返回此枚举映射的克隆副本。

**Example:**

**例：**

// Java program to demonstrate the example 
    // of EnumMap clone() method of EnumMap
    
    import java.util.*;
    
    public class CloneOfEnumMap {
        
        public enum Colors {
        
            RED,
            BLUE,
            PINK,
            YELLOW
        };
    
        public static void main(String[] args) {
        
            // We are creating two EnumMap objects
            EnumMap < Colors, String > em =
                new EnumMap < Colors, String > (Colors.class);
    
            EnumMap < Colors, String > clone_em =
                new EnumMap < Colors, String > (Colors.class);
    
            // By using put() method is to
            // add the linked values in an EnumMap
            em.put(Colors.RED, "1");
            em.put(Colors.BLUE, "2");
            em.put(Colors.PINK, "3");
            em.put(Colors.YELLOW, "4");
    
            // Display EnumMap
            System.out.println("EnumMap :" + em);
    
            // By using clone() method isto
            // clone the given EnumMap (em)
            clone_em = em.clone();
    
            // Display Cloned EnumMap
            System.out.println("em.clone(): " + clone_em);
        }
    }

**Output**

**输出量**

EnumMap :{RED=1, BLUE=2, PINK=3, YELLOW=4}
    em.clone(): {RED=1, BLUE=2, PINK=3, YELLOW=4}

> 翻译自: [https://www.includehelp.com/java/enummap-clone-method-with-example.aspx][https_www.includehelp.com_java_enummap-clone-method-with-example.aspx]

java enummap

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