/** The MusicalElement contains the base of songs and audibooks. * It is the abstract class they will take. * We use the classical get and set here.*/ class MusicalElement { private int id, duration; private String title, content; public MusicalElement(int id, String title, int duration, String content) { this.id=id; this.title=title; this.duration=duration; this.content=content; } public int getId(){return id;} public String getTitle(){return title;} public int getDuration(){return duration;} public String getContent(){return content;} public void setId(){this.id=id;} public void setTitle(){this.title=title;} public void setDuration(){this.duration=duration;} public void setContent(){this.content=content;} }