d equivilent of java's public static class fields

[%u]

I'm porting some code from Java to D and am getting stuck on what Java calls
static class fields.  I can't find out how to write the functional (or best
practices) equivalent in D.

(There are other syntax errors in D code, I'm fixing them one by one)

######### Begin D code (ported from Java code below, and I probably should use
an Enum, but .... haven't)
public class Answer
{
/* I've tried various combinations of syntax here */
  static int CORRECT = 0;
  public const int WRONG = 1;

  private int _answerCode;
  private string _answerText;

  /*
  */
  public this(int answerCode, string answerText)
  {
    _answerCode = answerCode;
    _answerText = answerText;
  }

  /*
  */
  public int getAnswerCode()
  {
    return _answerCode;
  }

  /*
  */
  public string getAnswerText()
  {
    return _answerText;
  }
}
####### End D code code

####### Begin Java code (included to show how it was done in java)
public class Answer
{
  public static final int CORRECT = 0;
  public static final int WRONG = 1;

  private int _answerCode;
  private String _answerText;

  /*
  */
  public Answer(int answerCode, String answerText)
  {
    _answerCode = answerCode;
    _answerText = answerText;
  }

  /*
  */
  public int getAnswerCode()
  {
    return _answerCode;
  }

  /*
  */
  public String getAnswerText()
  {
    return _answerText;
  }
}
###### End Java code

######### Begin D code snippet trying to use the Answer class
int asd = Answer.CORRECT; <-- compile error here

try
{
  answer = problem.getAnswer(reply); // grade answer

  if (answer.getAnswerCode() == Answer.CORRECT) <-- compile error here
    inOut.displayAnswer("Correct");
  else
    inOut.displayAnswer("Nope, " ~ answer.getAnswerText());
}
catch (Exception iae)
{
  inOut.displayAnswer(iae.getMessage());
  repeatQuestion = true; // show same question again
}
######### End D code snippet