@Test
    public void insertTest() {
        for (int i = 1; i < 9; i++) {
            System.out.println("");
            printTime(testJavaLinkedListInserts(10000 * (int) Math.pow(2, i)));
            printTime(testDoublyLinkedListInserts(10000 * (int) Math.pow(2, i)));
        }
    }