如何使用java声明枚举？ [英] How can I declare enums using java

问题描述

  public enum myEnum {
 ONE = 一，
 TWO =two，
}; 
  

因为我想将这个常量类更改为枚举

  public final class TestConstants {
 public static String ONE =one; 
 public static String TWO =two; 
} 
  

解决方案

  public enum MyEnum {
 ONE（1），
 TWO（2）; 
 private int value; 
 private MyEnum（int value）{
 this.value = value; 
} 
 public int getValue（）{
返回值; 
} 
} 
  

简而言之，您可以定义任意数量的参数枚举只要你提供构造函数的参数（并将值设置为相应的字段）

正如Scott所说 - 官方枚举文档给出答案。始终从语言特征和结构的官方文档开始。

更新：对于字符串，唯一的区别是你的构造函数参数是 String ，并声明枚举与 TEST（test）

I want to convert this sample C# code into a java code:

public enum myEnum {
  ONE = "one",
  TWO = "two",
}; 

Because I want to change this constant class into enum

public final class TestConstants {
    public static String ONE = "one";
    public static String TWO= "two";
}

解决方案

public enum MyEnum {
   ONE(1),
   TWO(2);
   private int value;
   private MyEnum(int value) {
      this.value = value;
   }
   public int getValue() {
      return value;
   }
}

In short - you can define any number of parameters for the enum as long as you provide constructor arguments (and set the values to the respective fields)

As Scott noted - the official enum documentation gives you the answer. Always start from the official documentation of language features and constructs.

Update: For strings the only difference is that your constructor argument is String, and you declare enums with TEST("test")

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