java enummap_Java EnumMap entrySet（）方法与示例

深藏阁楼爱情的钟 2023-03-05 15:53 23阅读 0赞

java enummap

## EnumMap类entrySet()方法 **(**EnumMap Class entrySet() method**)** ##

*  **entrySet() method** is available in java.util package.
    
    **entrySet()方法**在java.util包中可用。
 *  **entrySet() method** is used to get a set view of the mappings that exist in this enum map.
    
    **entrySet()方法**用于获取此枚举映射中存在的映射的集合视图。
 *  **entrySet() 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.
    
    **entrySet()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。
 *  **entrySet() method** does not throw an exception at the time of returning mappings in the set view.
    
    在set视图中返回映射时， **entrySet()方法**不会引发异常。

**Syntax:**

**句法：**

public Set entrySet();

**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 Set, it returns mapping of this enum map is to be viewed in a set.

此方法的返回类型为Set ，它返回要在集合中查看的该枚举映射的映射。

**Example:**

**例：**

// Java program to demonstrate the example 
    // of Set entrySet() method of EnumMap
    
    import java.util.*;
    
    public class EntrySetOfEnumMap {
        
        public enum Colors {
        
            RED,
            BLUE,
            PINK,
            YELLOW
        };
    
        public static void main(String[] args) {
        
            // We are creating EnumMap object
            EnumMap < Colors, String > 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 entrySet() method isto
            // represent the EnumMap to be viewed
            // in a Set object
    
            Set s = em.entrySet();
    
            // Display set view of EnumMap
            System.out.println("em.entrySet(): " + s);
        }
    }

**Output**

**输出量**

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

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

java enummap

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