Java REPL - Cannot Find Symbol - Interface Evaluation???

public class PezDispenser{

   //DECLARING VARIABLES: Static means that the int is accesible from class level. No need to initiate.
   public static final int MAX_PEZ = 12;
   private String mCharacterName;
   private int mPezCount;

   //CONSTRUCTOR: Method that is Executed right when file is initiated.
   public PezDispenser(String characterName) {
      mCharacterName = characterName;
      mPezCount = 0;
   }

   //BOOLEAN that is checking if mPezCount is equal to 0, in other words, empty.
   public boolean isEmpty(){
      return mPezCount == 0;
   }

   //LOADER: Loads the Pez Dispenser, void means that the method does not return anything.
   public void load(){
      mPezCount = MAX_PEZ;
   }

   //GETTER: Gets Character Name from private string mCharacterName.
   public String getCharacterName() {
      return mCharacterName;
   }
}