Dice.java

import java.util.Random;

public class Dice {

    private Integer faces;

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

    public void setFaces(int faces) {
        this.faces = faces;
    }

    public Integer roll() {
        Random var = new Random();
        return var.nextInt(faces);
    }

    public Integer rollingSummingX(int x) {
        int r = 0;
        for (int i = 0; i < x; i++) {
            r = r + roll();
        }
        return r;
    }

    public Integer[] rollingX(Integer x) {
        Integer[] results = new Integer[x];
        for (int i = 0; i < x; i++) {
            results[i] = roll();
        }
        return results;
    }

    public String flipCoin() {
        if (new Random().nextInt(2) == 0) {
            return "heads";
        } else {
            return "tails";
        }
    }

}