Rater.java

/**
 * Write a description of interface Rater here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
import java.util.ArrayList;

public interface Rater
{

    public void addRating(String item, double rating);
    
    public boolean hasRating(String item);

    public String getID();

    public double getRating(String item);

    public int numRatings();

    public ArrayList<String> getItemsRated();
    
}