ZCW-DiceyLab/DiceyLab/Dice.java

public class Dice
{
    private int numberOfDice = 1;

    public Dice()
    {
    }

    public Dice (int numberOfDice){
        this.numberOfDice = numberOfDice;    
    }

    public Integer roll(){ 
        int counter = numberOfDice;
        Integer sum = 0;
        while (counter > 0){
            sum += (int)(Math.random()*6)+1;
            counter--;
        }
        return sum;
    }

    public Integer roll(int numberOfRolls)
    {
        Integer sum = 0;
        while (numberOfRolls > 0){
            sum += roll();
            numberOfRolls--;
        }
        return sum;
    }
}