Multiple Enum Classes in one Java File

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I have 3 String arrays with constants. eg:

 String[] digit = {"one", "two", "three"};
 String[] teen= {"ten", "twenty", "thirty"};
 String[] anchors = {"hundred", "thousand", "million"};

I'm thinking of transferring these to enums separately, so I will have 3 enum classes: digit, teen and anchors with getValue methods implemented. But I don't want to have them in separate files as I have only small data and same type of data. What is the best way to have all these with access methods in same meaningful java file?

2012-04-04 19:13
by popcoder


They can be three inner classes like this:

public class Types {
  public enum Digits {...}
  public enum Teens {...}

Then refer them Types.Digits.ONE, Types.Teen.TWENTY etc.

You can also use static imports like this:

import Types.Digits;
import Types.Teen;


in order to have shorter references: Digits.ONE, Teen.TWENTY etc.

2012-04-04 19:15
by Eugene Retunsky
The only suggestion I would make is to change the signature of the enums to public static enum. That way, we can use a static import on the needed enums and save a bit of typing for the user - jpm 2012-04-04 19:20
enums are already static - you don't have to declare them as static (like interfaces) - Eugene Retunsky 2012-04-04 19:25
Right you are. I'm sure I learned that at some point. Still, unless using the fully qualified name adds readability or clarity, I would still suggest going with the static import, though that's really a point of personal preference, I suppose - jpm 2012-04-04 19:29
Good point. I updated the answer - Eugene Retunsky 2012-04-04 19:38