HashMap no-parameter constructor is as follows:

    /**
     * Constructs an empty <tt>HashMap</tt> with the default initial capacity
     * (16) and the default load factor (0.75).
     */
    public HashMap() {
        this.loadFactor = DEFAULT_LOAD_FACTOR; // all other fields defaulted
    }

how does it construct a container with an initial capacity of 16, as it says in its Javadoc? Doesn"t the Node array have to be initialized? Add at least one sentence

table = new Node<>[DEFAULT_INITIAL_CAPACITY];

is only reasonable!
Please give us your advice!