#Arraylist java api how to#
#Arraylist java api code#

The capacity can be decreased by calling TrimToSize or by setting the Capacity property explicitly. As elements are added to an ArrayList, the capacity is automatically increased as required through reallocation. The capacity of an ArrayList is the number of elements the ArrayList can hold. To maintain a collection that is automatically sorted as new elements are added, you can use the SortedSet class. You must sort the ArrayList by calling its Sort method prior to performing operations (such as BinarySearch) that require the ArrayList to be sorted. The ArrayList is not guaranteed to be sorted. See Non-generic collections shouldn't be used on GitHub for general information on the use of generic instead of non-generic collection types. See Performance Considerations in the List reference topic for a discussion of the relative performance of these classes. For a homogeneous collection of objects, use the List class.For a heterogeneous collection of objects, use the List (in C#) or List(Of Object) (in Visual Basic) type.However, it does not always offer the best performance.

The ArrayList class is designed to hold heterogeneous collections of objects. Instead, we recommend that you use the generic List class. We don't recommend that you use the ArrayList class for new development.

#Arraylist java api code#

' This code produces output similar to the following: Public Shared Sub PrintValues(myList As IEnumerable) Displays the properties and values of the ArrayList.Ĭonsole::WriteLine( ' Count: ', myAL.Capacity) Creates and initializes a new ArrayList.

#Arraylist java api how to#

The following example shows how to create and initialize an ArrayList and how to display its values. ICollection IEnumerable IList ICloneable Examples Interface IEnumerable Public Class ArrayList Interface ICloneable type ArrayList = class

Interface ICollection type ArrayList = class Public class ArrayList : ICloneable, type ArrayList = class public ref class ArrayList : System::Collections::IList public ref class ArrayList : ICloneable, System::Collections::IList public class ArrayList : public class ArrayList : ICloneable, Implements the IList interface using an array whose size is dynamically increased as required.