Album

import java.time.Duration;
import java.util.ArrayList;

public class Album {

    private String name, band;
    private Duration length; // total running time of the whole album

    public Album(String name, String band) {
        this.name = name;
        this.band = band;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getBand() {
        return band;
    }

    public void setBand(String band) {
        this.band = band;
    }

    public Duration getLength() {
        return length;
    }

    public void addSong(Duration length) {
        if (length == null) {
            throw new IllegalArgumentException();
        } else {
            // Add the "length" paramter to the length of the album! Use +=
        }
    }

    public ArrayList <Duration> getSongs() {
        return new ArrayList <Duration>(); // Change this!
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Album) {
            Album that = (Album) obj;
            return this.getName().equalsIgnoreCase(that.getName())
                    && this.getBand().equalsIgnoreCase(that.getBand());
        } else {
            return false;
        }
    }

    @Override
    public String toString() {
        return "Album[" +
                "name= " + name + ", " +
                ", band= " + band + ", " +
                ", length= " + length + "]";
    }
}