Doing Java course, at UNI atm, and I'm having a bit of trouble with a dice-problem.
I have the following:
public class Die { public int eyes; private java.util.Random r; private int n; public Die (int n) { r = new Random(); this.n = n; } public void roll() { eyes = r.nextInt(Die.n); } When compiling I get: non-static variable n cannot be referenced from a static context. How would I go about fixing this, whilst having it randomize from a user given value?
n is not a static variable, so you cannot refer to it in a static manner (Die.n).
Since it is an instance variable in the Die class, and you are referring to it in the Die class, you can just use n instead of Die.n.
roll()? You should be creating a new Die object by using Die die = new Die(6); (or whatever number you want), then you would call die.roll();.r.nextInt(n) + 1 otherwise you could get 0, which doesn't make sense for a die.Die die = new Die(); to the contructor, still getting nullpointer
Die die = new Die(); won't compile since you do not have a no argument constructor for Die class.Remove
Die.n and change it to simply
n If n were declared static, you could use the both notations, even though the first one would be redundant (because you're from the inside of containing class)
