Document.java in pgm

Document.java

public class Document

{

    private final String id;       

    private Vector profile;        

    public Document(String name, int k, int d)

    {

        id = name;

        String doc = (new In(name)).readAll();

        int N = doc.length();

        double[] freq = new double[d];

        for (int i = 0; i < N-k; i++)

       {

            int h = doc.substring(i, i+k).hashCode();

            freq[Math.abs(h % d)] += 1;

        }

        profile = (new Vector(freq)).direction();

    }

    public double simTo(Document other)

   {

        return profile.dot(other.profile);

    }

    public String name()

   {

        return id;

    }

    public static void main(String[] args)

   {

        String name = args[0];

        int k = Integer.parseInt(args[1]);

        int d = Integer.parseInt(args[2]);

        Document doc = new Document(name, k, d);

        System.out.println(doc.profile);

    }

}