Re: ENUMs

From:
"Jeff Higgins" <oohiggins@yahoo.com>
Newsgroups:
comp.lang.java.help
Date:
Sat, 17 Feb 2007 12:26:50 -0500
Message-ID:
<HVGBh.7$gW.1@newsfe06.lga>
John wrote:

Jeff Higgins wrote:

class TestPromotion{ // this is only a test.

  public static void main(String args){


Correction: public static void main(String[] args){

    System.out.println(Rank.PFC.promote());
  }

  public static enum Rank {
    PRIVATE,
    PFC,
    CORPORAL,
    SERGENT,
    CAPTAIN,
    MAJOR,
    LT_COLONEL,
    COLONEL,
    GENERAL,
    ADMIRAL;

    Rank promote(){
      Rank ret = null;
      Rank[] r = Rank.values();
      if(!this.equals(r[r.length-1])){
        for(int i=0; i<r.length; i++)
          if(this.equals(r[i])){
            ret = r[i+1];
            return ret;
        }
      }
      return ret;
    }
  };
}


Fantastic. Question...why does the promote method have to be in the enum?
I would rather have the promote method in the Soldier class. Is there a
way to do this?


What Lew said.

public Rank promote(Rank rank) {
  Rank ret = null;
  Rank[] r = Rank.values();
  if(!rank.equals(r[r.length-1])){
    for(int i=0; i<r.length; i++)
      if(rank.equals(r[i])){
        ret = r[i+1];
        return ret;
      }
    }
  return ret;
}

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