CODEWITHSUNDEEP
javaclassenumsinterface
bfj5889
bfj5889

Reputation: 31

Java enum placement in Interface or Class

I am trying to understand enums in Java, but currently can not find a post that explains the question I am asking.

I have a Person interface and a PersonEO class. Two methods of the Person Interface are setGender and getGender. I would like to hold gender as an enum.

Do I create the enum in the interface and have it get carried over to the class or do I make the enum in the class?

This is currently what I have been trying but can not get the enum to pass over to the class properly and don't really understand how it will flow through the program.

public interface Person{
    public enum gender{
    Female,
    Male,
    Unknown;

       private String gender;

       public String getGender(){
       }

       void setGender(){  
       }
}


------------------------------------------------------


public class PersonEO implements Person {
   //Both override methods are not seen as methods from the interface

   @Override
   public String getGender() {
       return gender;
   }

   @Override
   public void setGender() {
       //Not sure how to set the gender from the enum
       this.gender = gender;
   }
}

Please show an example.

Upvotes: 1

Views: 2624

Answers (1)

shmosel
shmosel

Reputation: 50776

The enum, interface and class are all separate types and should usually be in separate files. Here are some sample definitions:

enum Gender {
    MALE, FEMALE, UNKNOWN;
}

interface Person {
    void setGender(Gender gender);
    Gender getGender();
}

class PersonImpl implements Person {
    private Gender gender;

    @Override
    public void setGender(Gender gender) {
        this.gender = gender;
    }

    @Override
    public Gender getGender() {
        return this.gender;
    }
}

Upvotes: 6

Related Questions