Random Generation

public double myRandomGenerator(double c, double alpha)
    {
        double u, v, t, s;

        u = Math.PI * (randomGenerator.nextDouble()-0.5);

        if(alpha == 1)              //CAUCHY
        {
            t = Math.tan(u);

            return c*t;
        }

        do
        {
            v = -Math.log(randomGenerator.nextDouble());
        } while(v == 0);

        if(alpha == 2)                  //GAUSSIAN
        {
            t = 2*Math.sin(u)*Math.sqrt(v);

            return c*t;
        }

        //GENERAL CASE
        t = Math.sin(alpha*u) / Math.pow(Math.cos(u), 1/alpha);
        s = Math.pow(Math.cos((1-alpha)*u) / v, (1-alpha)/alpha);

        return c*t*s;
    }