public void ArrayListOperations() { ArrayList arrayList = new ArrayList(); arrayList.Add(10); arrayList.Add(89); arrayList.Add(29); arrayList.Add(-1); arrayList.Add(15); PrintArrayList(arrayList); arrayList.Sort(); arrayList.Insert(2, 18); PrintArrayList(arrayList); Console.WriteLine("\nArraylist capacity\t" + arrayList.Capacity); int hasElement = arrayList.IndexOf(23); if (hasElement >= 0) { Console.WriteLine("Element is present"); } else { Console.WriteLine("Element is not present"); } arrayList.TrimToSize(); Console.WriteLine("\nArraylist capacity\t" + arrayList.Capacity); int[] arr = { 14, 17 }; arrayList.AddRange(arr); PrintArrayList(arrayList); arrayList.InsertRange(3, arr); PrintArrayList(arrayList); arrayList.SetRange(7, arr); PrintArrayList(arrayList); }
public ArrayList_p() { arrayList = new ArrayList(); arrayList1 = new ArrayList(40); Console.WriteLine("ArrayList default capacity: {0}", arrayList.Capacity); Console.WriteLine("ArrayList(40) default capacity: {0}", arrayList1.Capacity); arrayList.Add("some"); arrayList.Add("text"); Console.WriteLine("ArrayList capacity (after adding 2 elements): {0}", arrayList.Capacity); arrayList.Add("foo"); arrayList.Add("bar"); arrayList.Add("lol"); Console.WriteLine("ArrayList capacity (after adding 3 elements): {0}", arrayList.Capacity); Console.WriteLine("ArrayList count elements: {0}", arrayList.Count); Console.WriteLine("ArrayList has a fixed size: {0}", arrayList.IsFixedSize); Console.WriteLine("ArrayList is read-only: {0}", arrayList.IsReadOnly); Console.WriteLine("ArrayList is synchronized (thread-safe): {0}", arrayList.IsSynchronized); var s_arrList = ArrayList.Synchronized(arrayList); Console.WriteLine("ArrayList is synchronized (thread-safe): {0}", s_arrList.IsSynchronized); lock (arrayList.SyncRoot) { foreach (var element in arrayList) { Console.Write("{0} ", element.ToString()); } Console.Write("\n"); } // ArrayList does not guarantee sorted array, need to sort in manually before doing BinarySearch arrayList.Sort(); int elementIndex = arrayList.BinarySearch("foo"); Console.WriteLine("ArrayList BinarySearch returns element position: {0}", elementIndex.ToString()); arrayList.TrimToSize(); Console.WriteLine("ArrayList capacity after trimming to size: {0}", arrayList.Capacity); arrayList.Clear(); Console.WriteLine("ArrayList count after clearing: {0}", arrayList.Count); Console.WriteLine("ArrayList capacity after clearing: {0}", arrayList.Capacity); }