Java.lang.Enum.ordinal()方法

最新推荐文章于 2025-03-11 08:52:29 发布

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最新推荐文章于 2025-03-11 08:52:29 发布

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Java.lang.Enum.ordinal()方法

Java.lang.Enum.ordinal()方法用法实例教程 -

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描述

java.lang.Enum.ordinal()方法返回此枚举常量的序数（其枚举声明中的位置，其中初始常量分配的序数为零）。

声明

以下是java.lang.Enum.ordinal()方法的声明

public final int ordinal()

参数

返回值

此方法返回的枚举常量的序数。

异常

实例

下面的例子说明了如何使用java.lang.Enum.ordinal()方法.

package com.yiibai;

import java.lang.*;
 
// enum showing Mobile prices
enum Mobile {
   Samsung(400), Nokia(250),Motorola(325);
  
   int price;
   Mobile(int p) {
      price = p;
   }
   int showPrice() {
      return price;
   } 
}

public class EnumDemo {

   public static void main(String args[]) {

     System.out.println("CellPhone List:");
     for(Mobile m : Mobile.values()) {
        System.out.println(m + " costs " + m.showPrice() + " dollars");
     }

     Mobile ret = Mobile.Samsung;
     System.out.println("The ordinal is = " + ret.ordinal());
     System.out.println("MobileName = " + ret.name());                      
   }
}

让我们来编译和运行上面的程序，这将产生以下结果：

CellPhone List:
Samsung costs 400 dollars
Nokia costs 250 dollars
Motorola costs 325 dollars
The ordinal is = 0
MobileName = Samsung