这是我实现接口的尝试。
我得到以下错误

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

这是超级班

package au.edu.uow.Collection;

public interface Album {

    String getMediaType();

    String getTitle();

    String getGenre();

}

这是小班

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 这是我使用的参考资料，但它不适合我。