Prog2 - Pagerank

package pagerank;

/**
 *
 * @author hallgato
 */
public class PageRank {
    /*
     * linkek
     */

    double[][] L = {
        {0.0, 0.0, 1.0 / 3.0, 0.0},
        {1.0, 1.0 / 2.0, 1.0 / 3.0, 1.0},
        {0.0, 1.0 / 2.0, 0.0, 0.0},
        {0.0, 0.0, 1.0 / 3.0, 0.0}
    };
    /*
     * PageRank
     */
    double pr[] = {0.0, 0.0, 0.0, 0.0};
    double prv[] = {1.0 / 4.0, 1.0 / 4.0, 1.0 / 4.0, 1.0 / 4.0};

    public void kiir() {
        int i, j;
        for (i = 0; i < this.pr.length; i++)
        {
          System.out.println(this.pr[i]);
        }
    }

    public double tavolsag(double[] pr, double prv[])
    {
        int i;
        double osszeg = 0;
        for (i = 0; i< this.pr.length; i++)
        {
            osszeg  += (this.prv[i] - this.pr[i]) * (this.prv[i] - this.pr[i]);
        }

        return Math.sqrt(osszeg);
    }

    public void szamol(double[][]L, double[] pr, double prv[])
    {
        int i;
        int j;

        for (;;)
        {
            for (i = 0; i < 4; i++)
            {
                this.pr[i] = 0.0;
                for (j = 0; j < 4; j++)
                {
                    this.pr[i] += (this.L[i][j] * this.prv[j]);
                }
            }

            if (this.tavolsag (this.pr, this.prv) < 0.00000001) { break; }

            for (i=0; i<4; i++)
            {
                this.prv[i] = this.pr[i];
            }
        }
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)
    {
        PageRank prank = new PageRank();
        prank.szamol(prank.L, prank.pr, prank.prv);
        prank.kiir();
    }
}