How to convert enum value to int

Question

I have a function which return a type int  However  I only have a value of the TAX enumeration   How can I cast the TAX enumeration value to an int   public enum TAX       NOTAX 0  SALESTAX 10  IMPORTEDTAX 5        private int value      private TAX int value           this value   value           TAX var   TAX NOTAX     This value will differ  public int getTaxValue          what do do here       return  int var

User · Answer

If you want the value you are assigning in the constructor, you need to add a method in the enum definition to return that value.

If you want a unique number that represent the enum value, you can use ordinal().

User · Answer

You d need to make the enum expose value somehow  e g   public enum Tax       NONE 0   SALES 10   IMPORT 5        private final int value      private Tax int value            this value   value             public int getValue             return value                public int getTaxValue         Tax tax   Tax NONE     Or whatever     return tax getValue         I ve changed the names to be a bit more conventional and readable  btw    This is assuming you want the value assigned in the constructor  If that s not what you want  you ll need to give us more information

User · Answer

public enum Tax    NONE 1   SALES 2   IMPORT 3    private final int value      private Tax int value            this value   value             public String toString             return Integer toString value            class Test       System out println Tax NONE        Just an example

User · Answer

Sometime some C  approach makes the life easier in Java world     class XLINK   static final short PAYLOAD   102  ACK   103  PAYLOAD AND ACK   104      Now is trivial to use it like a C  enum  int rcv   XLINK ACK

User · Answer

A somewhat different approach  at least on Android  is to use the IntDef annotation to combine a set of int constants   IntDef  NOTAX  SALESTAX  IMPORTEDTAX    interface TAX    int NOTAX   0  int SALESTAX   10  int IMPORTEDTAX   5    Use as function parameter   void computeTax  TAX int taxPercentage          or in a variable declaration    TAX int currentTax   IMPORTEDTAX

User · Answer

Maybe it s better to use a String representation than an integer  because the String is still valid if values are added to the enum  You can use the enum s name   method to convert the enum value to a String an the enum s valueOf   method to create an enum representation from the String again  The following example shows how to convert the enum value to String and back  ValueType is an enum    ValueType expected   ValueType FLOAT  String value   expected name     System out println  Name value      value    ValueType actual   ValueType valueOf value    if expected equals actual   System out println  Values are equal

User · Answer

I prefer this   public enum Color       White      Green      Blue      Purple      Orange      Red     then     cast enum to int int color   Color Blue ordinal

[java] How to convert enum value to int?

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