Esercizio nr.12 Seconda Prova

/////Testo Esercizio: http://imageshack.us/a/img829/3808/19022013.jpg
import java.util.Random;
abstract class A
{
    private float[] x;
    public A(float a)
    {
        x=new float[10];
        x[0]=a;
        for(int i=1; i<x.length; i++)
        {
            x[i]=(float)(Math.sin(100*x[i-1]));
        }
    }
    public abstract float f();
    public float[] getX()
    {
        return x;
    }
    public String toString()
    {
        String str="";
        for(int i=0; i<x.length; i++)
        {
            str+=""+x[i]+" ";
        }
        return str;
    }
}
class B extends A
{
    public B(float a)
    {
        super(a);
    }
    public float f()
    {
        float max=getX()[0];
        for(int i=1; i<getX().length; i++)
        {
            if(getX()[i]>max)
            {
                max=getX()[i];
            }
        }
        return max;
    }
    public String toString()
    {
        return "class B"+"[ "+super.toString()+"] f()="+f();
    }
}
class C extends A
{
    public C(float a )
    {
        super(a);
    }
    public float f()
    {
        float somma=0;
        for(int i=0;i<getX().length;i++)
        {
            somma+=getX()[i];
        }
        return (float)(somma/getX().length);
    }
    public int gte(float thr)
    {
        int contatore=0;
        for(int i=0;i<getX().length;i++)
        {
            if(getX()[i]>thr)
            {
                contatore++;
            }
        }
        return contatore;
    }
    public String toString()
    {
        return "class C"+"[ "+super.toString()+"]  f()="+f()+" gte(.7)="+gte((float)0.7);
    }
}
class D
{
    private A a;
    private B b;
    private C c;
    public D(float seed)
    {
        if(seed>0.5)
        {
            a=new B(seed);
        }else
        {
            a=new C(seed);
        }
        b=new B(seed/2);
        c=new C(seed/3);
    }
    public float m()
    {
        float sigma=0;
        A p;
        if(a instanceof C)
        {
            p=c;
        }else
        {
            p=b;
        }
        for(int i=0; i<(p.getX()).length; i=i+2)
        {
            sigma+=Math.max(a.getX()[i],p.getX()[i]);
        }
        return sigma;
    }
    public float h(float thr)
    {
        if(a instanceof C)
        {
            return (float)((c.f()/b.f())*((C)a).gte(thr));
        }else
        {
            return (float)(c.f()/b.f());
        }
    }
    public String toString()
    {
        return a.toString()+"\n"+"    "+b.toString()+"\n"+"    "+c.toString()+" "+"h(.7)="+h((float)0.7)+" m()="+m();
    }
}
class Esercizio_12
{
    public static void main(String[] args)
    {
        Random r=new Random(347537586);
        D[] vett=new D[50];
        for(int i=0;i<vett.length; i++)
        {
            vett[i]=new D(r.nextFloat());
        }
        //Parte 0
        for(int i=0;i<vett.length; i++)
        {
            System.out.println(i+"    "+vett[i].toString());
        }
        //Parte 1
        float sommaH=0;
        for(int i=0;i<vett.length;i++)
        {
            sommaH+=vett[i].h((float)0.7);
        }
        System.out.print("Media= "+sommaH/vett.length);
        //Parte 2
        System.out.println("    vett[4].m()+vett[5].m()= "+(vett[4].m()+vett[5].m()));
    }
}