Dataset - Sum , Min, Max and Interface

[xgiovio]

dataset

package data;

/**
 * Created with MONSTER.
 * User: xgiovio
 * Date: 28/10/13
 * Time: 23.18
 */
public class dataset {

        public void add (misurabile_interface obj) {
                 sum += obj.get_misure();
                 count++;
                 if (min == null || obj.get_misure() < min.get_misure()){
                    min=obj;
                  }
                 if (max == null || obj.get_misure() > min.get_misure()){
                    max=obj;
                 }
        }

        public misurabile_interface get_min (){
        return min;
        }
        public misurabile_interface get_max (){
            return max;
        }
        public double get_average (){
            if (count != 0)
            return (sum/count);
            return 0;
        }




    private int count = 0;
    private double sum = 0;
    private misurabile_interface min = null;
    private misurabile_interface max = null;




} 

misurabile_interface

package data;

/**
 * Created with MONSTER.
 * User: xgiovio
 * Date: 28/10/13
 * Time: 23.35
 */
public interface misurabile_interface {

    double get_misure();
} 

Oggetto_misurabile

package data;

/**
 * Created with MONSTER.
 * User: xgiovio
 * Date: 28/10/13
 * Time: 23.36
 */
public class Oggetto_misurabile  implements misurabile_interface {

    public Oggetto_misurabile (double in_data) {
      misura = in_data;
    }

    public double get_misure() {
        return misura;
    }

    private double misura;

} 

main

import data.Oggetto_misurabile;
import data.dataset;

public class test {

    public static void main(String[] input){

        dataset dati = new dataset();
        dati.add(new Oggetto_misurabile(10.5));
        dati.add(new Oggetto_misurabile(11));
        dati.add(new Oggetto_misurabile(2));

        System.out.println( (dati.get_max()).get_misure() );
        System.out.println( (dati.get_min()).get_misure() );
        System.out.println( dati.get_average() );

    }

}