public void equals(VHashMap hashMap) {
    if (hashMap.keySet().equals(this.keySet())) {
      System.out.println("Both keys are Equal");
    } else System.out.println("Both keys are not Equal");

    if (hashMap.entrySet().equals(this.entrySet())) {
      System.out.println("Both datasets are Equal");
    } else System.out.println("Both datasets are NOT Equal");
  }