hashmap示例_Java HashMap values（）方法与示例

灰太狼 2023-03-05 12:59 2阅读 0赞

hashmap示例

## HashMap类的values()方法 **(**HashMap Class values() method**)** ##

*  **values() method** is available in java.util package.
    
    **values()方法**在java.util包中可用。
 *  **values() method** is used to return the set of values that exists in this HashMap to be viewed in a Collection.
    
    **values()方法**用于返回此HashMap中存在的一组值，以在Collection中进行查看。
 *  **values() 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.
    
    **values()方法**是一种非静态方法，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。
 *  **values() method** does not throw an exception at the time of collecting values.
    
    **values()方法**在收集值时不会引发异常。

**Syntax:**

**句法：**

public Collection values();

**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 the method is Collection, it returns Collection view of all the values exists in this HashMap.

方法的返回类型为Collection ，它返回此HashMap中存在的所有值的Collection视图。

**Example:**

**例：**

// Java program to demonstrate the example 
    // of Collection values() method of HashMap 
    
    import java.util.*;
    
    public class ValuesOfHashMap {
        
        public static void main(String[] args) {
        
            // Instantiates a HashMap object
            Map < Integer, String > map = new HashMap < Integer, String > ();
    
            // By using put() method is to add
            // key-value pairs in a HashMap
            map.put(10, "C");
            map.put(20, "C++");
            map.put(50, "JAVA");
            map.put(40, "PHP");
            map.put(30, "SFDC");
    
            // Display HashMap
            System.out.println("HashMap: " + map);
    
            // By using values() method is to return
            // the values exists in this HashMap
            // to be viewed in a collection
            Collection co = map.values();
    
            //Display collection
            System.out.print("map.values(): " + co);
        }
    }

**Output**

**输出量**

HashMap: {50=JAVA, 20=C++, 40=PHP, 10=C, 30=SFDC}
    map.values(): [JAVA, C++, PHP, C, SFDC]

> 翻译自: [https://www.includehelp.com/java/hashmap-values-method-with-example.aspx][https_www.includehelp.com_java_hashmap-values-method-with-example.aspx]

hashmap示例

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