Java EnumMap values()用法及代碼示例

Java中的Java.util.EnumMap.values()方法用於從Map值中創建一個集合。它本質上返回EnumMap中的值的Collection視圖。

用法:

EnumMap.values()

參數：該方法不帶任何參數。

返回值：該方法返回映射值的收集視圖。

以下程序說明了Java.util.EnumMap.values()函數的工作：
示例1:

// Java program to demonstrate values() 
import java.util.*; 
  
// An enum of geeksforgeeks 
public enum gfg { 
    India_today, 
    United_States_today 
} 
; 
  
class Enum_demo { 
    public static void main(String[] args) 
    { 
  
        EnumMap<gfg, Integer> mp = new 
                        EnumMap<gfg, Integer>(gfg.class); 
  
        // Values are associated 
        mp.put(gfg.India_today, 69); 
        mp.put(gfg.United_States_today, 1073); 
  
        // Prints the map 
        System.out.println("The EnumMap: " + mp); 
  
        // Retrieving the collection view of the map 
        Collection<Integer> view = mp.values(); 
  
        // Prints the result 
        System.out.println("Collection view of map: " + view); 
    } 
}

輸出：

The EnumMap: {India_today=69, United_States_today=1073}
Collection view of map: [69, 1073]

示例2:

// Java program to demonstrate the working of values() 
import java.util.*; 
  
// An enum of geeksforgeeks 
public enum gfg { 
    India_today, 
    United_States_today, 
    Canada_today 
} 
; 
  
class Enum_demo { 
    public static void main(String[] args) 
    { 
        EnumMap<gfg, Integer> mp = new 
                      EnumMap<gfg, Integer>(gfg.class); 
  
        // Values are associated 
        mp.put(gfg.India_today, 69); 
        mp.put(gfg.United_States_today, 1073); 
        mp.put(gfg.Canada_today, 1837); 
  
        // Prints the map 
        System.out.println("The EnumMap: " + mp); 
  
        // Retrieving the collection view of the map 
        Collection<Integer> view = mp.values(); 
  
        // Prints the result 
        System.out.println("Collection view of map: " + view); 
    } 
}

輸出：

The EnumMap: {India_today=69, United_States_today=1073, Canada_today=1837}
Collection view of map: [69, 1073, 1837]

相關用法

注：本文由純淨天空篩選整理自akash1295大神的英文原創作品 EnumMap values() Method in Java。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。