I am having issues creating a stack with random inputs. I have attached the code I wrote for it but I am getting the error message that my stack is null when I am trying to initialize it.

NewLinkedStack myStack = NewLinkedStack(); myStack = NewLinkedStack(); System.out.println("How many elements do you want in the stack? "); int length = in.nextInt(); // Creating new stack for(int i = 0; i < length; i++) { int value = rand.nextInt(); myStack.push(value); System.out.println(myStack); }