LinkedList.java

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 */
package data.visualizer;
class LinkedList {
    private Node head;

    public void add(int value) {
        if (head == null) {
            head = new Node(value);
        } else {
            Node temp = head;
            while (temp.next != null) {
                temp = temp.next;
            }
            temp.next = new Node(value);
        }
    }

    public int[] toArray() {
        int size = size();
        int[] array = new int[size];
        Node temp = head;
        for (int i = 0; i < size; i++) {
            array[i] = temp.value;
            temp = temp.next;
        }
        return array;
    }

    public int size() {
        int count = 0;
        Node temp = head;
        while (temp != null) {
            count++;
            temp = temp.next;
        }
        return count;
    }

    public void clear() {
        head = null;
    }

    public boolean isEmpty() {
        return head == null;
    }

    static class Node {
        int value;
        Node next;

        Node(int value) {
            this.value = value;
        }
    }
}