IdentityHashMap类values()方法 (IdentityHashMap 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 values exist in this IdentityHashMap to be viewed in a Collection.

  values()方法用于返回此IdentityHashMap中存在的值，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 getting values in a Collection.

  在Collection中获取值时， values()方法不会引发异常。

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 the Collection view of all the values exists in this IdentityHashMap.

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

Example:

例：

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

Output

输出量

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

翻译自: https://www.includehelp.com/java/identityhashmap-values-method-with-example.aspx