CODEWITHSUNDEEP
javaenums
Christian
Christian

Reputation: 6440

Get all values for an Enum constant in Java? (Is there a built-in method to do that or do I need to write my own getters?)

I have an enum like the following:

public enum Foo {

   BAR("v1", "v2", "v3"),
   BAZ("x1", "x2", "x3"),
   // ...

   // version a
   private String[] vals;
   private Foo(String... vals) {
      this.vals = vals;
   }

   // version b
   private String v1, v2, v3;
   private Foo(String v1, String v2, String v3) {
      this.v1 = v1;
      this.v2 = v2;
      this.v3 = v3;
   }

}

How do I get a List of "v1", "v2", "v3" back when I know I have a Foo.BAR? Do I have to write my own getters, or is there something built into Enum, much like values() (but for the actual values)?

Upvotes: 0

Views: 187

Answers (3)

user902383
user902383

Reputation: 8640

It depends, if your v1,v2,v3 are some random unrelated values, i think is better to go with version b, and create separate getter for each one

if from other hand they are related, then you could return copy of your array or have single getter like this one

String getValue(int index){
return vals[index-1];
}

Upvotes: 1

Sbodd
Sbodd

Reputation: 11474

You have to write your own getter(s) for custom properties, etc. For your "version A" example, you could do 

public String[] getValues() {
  return vals;
}

(though you probably would want to return a copy of values, rather than the array itself.)

Upvotes: 1

Puce
Puce

Reputation: 38152

You have to write/ (or with an IDE generate) the getters yourself.

Upvotes: 0

Related Questions