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
– toniedzwiedz, Commented Aug 25, 2012 at 12:03

Heisenbug · Accepted Answer · 2012-08-25 12:13:46Z

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{ }

Bharat Sinha · Accepted Answer · 2012-08-25 12:07:30Z

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 { //.... }

Mohammod Hossain · Accepted Answer · 2012-08-25 12:04:32Z

0

check your interface package is correctly imported.

answered Aug 25, 2012 at 12:04

Mohammod Hossain

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2 Comments

Daniel Del Core Over a year ago

if the interface is called Album.java would the import statement be Import Album.java ??

Heisenbug Over a year ago

Album.java is the file name, not the interface name. You can't use dots in Java class names.

A.H. · Accepted Answer · 2012-08-25 12:13:06Z

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 .

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