要获取或设置ArrayList中指定索引处的元素,代码如下-
using System; using System.Collections; public class Demo { public static void Main() { ArrayList arrList = new ArrayList(); arrList.Add("Laptop"); arrList.Add("Desktop"); arrList.Add("Notebook"); arrList.Add("Ultrabook"); arrList.Add("Tablet"); arrList.Add("Headphone"); arrList.Add("Speaker"); Console.WriteLine("Elements in ArrayList..."); foreach(string str in arrList) { Console.WriteLine(str); } Console.WriteLine("Element at index 5 = " + arrList[5]); } }
输出结果
这将产生以下输出-
Elements in ArrayList... Laptop Desktop Notebook Ultrabook Tablet Headphone Speaker Element at index 5 = Headphone
让我们看另一个例子-
using System; using System.Collections; public class Demo { public static void Main() { ArrayList arrList = new ArrayList(); arrList.Add("Laptop"); arrList.Add("Desktop"); arrList.Add("Notebook"); arrList.Add("Ultrabook"); arrList.Add("Tablet"); arrList.Add("Headphone"); arrList.Add("Speaker"); Console.WriteLine("Elements in ArrayList..."); foreach(string str in arrList) { Console.WriteLine(str); } Console.WriteLine("Element at index 5 = " + arrList[5]); arrList[5] = "SSD"; Console.WriteLine("Element at index 5 (Updated) = " + arrList[5]); } }
输出结果
这将产生以下输出-
Elements in ArrayList... Laptop Desktop Notebook Ultrabook Tablet Headphone Speaker Element at index 5 = Headphone Element at index 5 (Updated) = SSD