使用列舉進行迭代的 Java 程式

在本文中，我們將瞭解如何對列舉物件進行迭代。列舉是一種表示一個較小物件集合的資料型別。

以下是示例 −

輸入

假設我們的輸入為 −

Enum objects are defined as : red, blue, green, yellow, orange

輸出

所需的輸出為 −

Printing the Objects: red
blue
green
yellow
orange

演算法

Step 1 – START
Step 2 - Declare the objects of Enum function namely red, blue, green, yellow, orange
Step 3 – Using a for loop, iterate over the objects of the enum function and print each object.
Step 4- Stop

示例 1

enum Enum {
   red, blue, green, yellow, orange;
}
public class Colour {
   public static void main(String[] args) {
      System.out.println("The values of Enum function are previously defined .");
      System.out.println("Accessing each enum constants");
      for(Enum colours : Enum.values()) {
         System.out.print(colours + "\n");
      }
   }
}

輸出

The values of Enum function are previously defined .
Accessing each enum constants
red
blue
green
yellow
orange

示例 2

以下是一個列印星期幾的示例。

import java.util.EnumSet;
enum Days {
   Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
}
public class IterateEnum{
   public static void main(String args[]) {
      Days my_days[] = Days.values();
      System.out.println("Values of the enum are: ");
      EnumSet.allOf(Days.class).forEach(day -> System.out.println(day));
   }
}

輸出

Values of the enum are:
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday

更新於： 21-Feb-2022

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