Java Implements interface

Question

this is my attempt at implementing an interface.

im getting the following error

javac MyCollection.java
./au/edu/uow/Collection/DVDAlbum.java:6: cannot find symbol
symbol: class Album
public class DVDAlbum implements Album{

this is the super class

package au.edu.uow.Collection;


public interface Album {

    String getMediaType();

    String getTitle();

    String getGenre();

}

And this is the sub class

public class DVDAlbum implements Album{

    private String Title;
    private String Genre;
    private String Director;
    private String Plot;
    private String MediaType;

    public DVDAlbum(String TempTitle, String TempGenre, String TempDirector, String TempPlot){
        Title = TempTitle;
        Genre = TempGenre;
        Director = TempDirector;
        Plot = TempPlot;
    }
    String getMediaType(){
        return MediaType;
    }
    String getTitle(){
        return Title;
    }
    String getGenre(){
        return Genre;
    }
}

http://www.javabeginner.com/learn-java/java-abstract-class-and-interface This was the reference i used but its not working for me.

They're probably in separate packages so you have to use `import au.edu.uow.Collection.Album;` in the file containing `DVDAlbum`. BTW, package names should be written in lowercase. — toniedzwiedz, Aug 25 '12 at 12:03

Heisenbug · Accepted Answer · 2012-08-25T12:13:46.287

2

If you aren't in the same package where the interface is declared, you need to import it:

import au.edu.uow.Collection.Album;

Or use the complete qualified name:

public class DVDAlbum implements au.edu.uow.Collection.Album{ }

edited Aug 25 '12 at 12:13

answered Aug 25 '12 at 12:08

Heisenbug

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score 1 · Answer 2 · answered Aug 25 '12 at 12:07

1

Add following

import au.edu.uow.Collection.Album;

public class DVDAlbum implements Album{
    //....
}

and

import au.edu.uow.Collection.DVDAlbum;
import au.edu.uow.Collection.Album;

public class MyCollection {
    //....
}

answered Aug 25 '12 at 12:07

Bharat Sinha

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score 0 · Answer 3 · answered Aug 25 '12 at 12:04

0

check your interface package is correctly imported.

answered Aug 25 '12 at 12:04

Mohammod Hossain

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if the interface is called Album.java would the import statement be Import Album.java ?? – Daniel Del Core Aug 25 '12 at 12:05
Album.java is the file name, not the interface name. You can't use dots in Java class names. – Heisenbug Aug 25 '12 at 12:12

score 0 · Answer 4 · answered Aug 25 '12 at 12:13

The error message

./au/edu/uow/Collection/DVDAlbum.java:6: cannot find symbol

means, that DVDAlbum and Album are intended to be in the same package and therefore no import is necessary.

BUT: The DVDAlbum is NOT in the right package because the package line is missing. So just copy the package line from Album into DVDAlbum .

Java Implements interface

4 Answers4