enum ordinal_Java Enum ordinal（）方法与示例

妖狐艹你老母 2023-03-05 12:49 10阅读 0赞

enum ordinal

## 枚举类ordinal()方法 **(**Enum Class ordinal() method**)** ##

*  **ordinal() method** is available in java.lang package.
    
    **ordinal()方法**在java.lang包中可用。
 *  **ordinal() method** is used to return the position of this enum constants is whatever defined in its enum declaration and the position of starting element of enum constant starts from 0.
    
    **ordinal()方法**用于返回此枚举常量的位置，无论其枚举声明中定义了什么，并且枚举常量的起始元素的位置均从0开始。
 *  **ordinal() 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.
    
    **ordinal()方法**是一种非静态方法，只能通过类对象进行访问，如果尝试使用类名称访问该方法，则会收到错误消息。
 *  **ordinal() method** is a final method, it does not override in child class.
    
    **ordinal()方法**是最终方法，它不会在子类中重写。
 *  This method does not throw an exception at the time of returning the position of the enum constants.
    
    返回枚举常量的位置时，此方法不会引发异常。

**Syntax:**

**句法：**

public final int ordinal();

**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 this method is int, it returns the position of this enum constant.

该方法的返回类型为int ，它返回该枚举常量的位置。

**Example:**

**例：**

// Java program to demonstrate the example 
    // of int ordinal() of Enum class
    
    
    enum Month {
        
    
        JAN,
        FEB,
        MAR,
        APR,
        MAY;
    }
    
    public class Ordinal {
        
        public static void main(String args[]) {
        
    
            Month m1 = Month.JAN;
            Month m2 = Month.FEB;
            Month m3 = Month.MAR;
            Month m4 = Month.APR;
            Month m5 = Month.MAY;
    
            System.out.println("Display Ordinal: ");
            // By using ordinal() method is to return the position of
            //enum constant in its enum definition 
            System.out.println("m1.ordinal() " + " " + m1.ordinal());
            System.out.println("m2.ordinal()" + " " + m2.ordinal());
            System.out.println("m3.ordinal()" + " " + m3.ordinal());
            System.out.println("m4.ordinal()" + " " + m4.ordinal());
            System.out.println("m5.ordinal()" + " " + m5.ordinal());
        }
    }

**Output**

**输出量**

Display Ordinal: 
    m1.ordinal()  0
    m2.ordinal() 1
    m3.ordinal() 2
    m4.ordinal() 3
    m5.ordinal() 4

> 翻译自: [https://www.includehelp.com/java/enum-ordinal-method-with-example.aspx][https_www.includehelp.com_java_enum-ordinal-method-with-example.aspx]

enum ordinal

[https_www.includehelp.com_java_enum-ordinal-method-with-example.aspx]: https://www.includehelp.com/java/enum-ordinal-method-with-example.aspx