C# ArrayList Item
Description
ArrayList Item gets or sets the element at the specified
index.
Syntax
ArrayList.Item has the following syntax.
public virtual Object this[
int index
] { get; set; }
Parameters
ArrayList.Item has the following parameters.
index- The zero-based index of the element to get or set.
Example
The following code example creates an ArrayList and adds several items.
/* ww w . j a v a2 s .c o m*/
using System;
using System.Collections;
public class Example
{
public static void Main()
{
// Create an empty ArrayList, and add some elements.
ArrayList stringList = new ArrayList();
stringList.Add("a");
stringList.Add("abc");
stringList.Add("abcdef");
stringList.Add("abcdefg");
Console.WriteLine("Element {0} is \"{1}\"", 2, stringList[2]);
stringList[2] = "abcd";
Console.WriteLine("Element {0} is \"{1}\"", 2, stringList[2]);
}
}
The code above generates the following result.
Example 2
The following example uses the Item property explicitly to assign values to items in the list.
using System;//ww w. j a v a 2s.c o m
using System.Collections;
public class ScrambleList : ArrayList
{
public static void Main()
{
ScrambleList integerList = new ScrambleList();
for (int i = 0; i < 10; i++)
{
integerList.Add(i);
}
integerList.Scramble();
}
public void Scramble()
{
int limit = this.Count;
int temp;
int swapindex;
Random rnd = new Random();
for (int i = 0; i < limit; i++)
{
temp = (int)this[i];
swapindex = rnd.Next(0, limit - 1);
this[i] = this[swapindex];
this[swapindex] = temp;
}
}
}
The code above generates the following result.
