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Creating an ArrayList having specified initial capacity in C#
To create an ArrayList having specified initial capacity, the code is as follows −
Example
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args) {
ArrayList list1 = new ArrayList(5);
list1.Add("A");
list1.Add("B");
list1.Add("C");
list1.Add("D");
Console.WriteLine("Capacity in ArrayList1 = "+list1.Capacity);
Console.WriteLine("Elements in ArrayList1...");
foreach (string res in list1) {
Console.WriteLine(res);
}
ArrayList list2 = new ArrayList(10);
list2.Add("A");
list2.Add("B");
list2.Add("C");
list2.Add("D");
list2.Add("E");
list2.Add("F");
list2.Add("G");
list2.Add("H");
list2.Add("I");
Console.WriteLine("Capacity in ArrayList2 = "+list2.Capacity);
Console.WriteLine("Elements in ArrayList2...");
foreach (string res in list2) {
Console.WriteLine(res);
}
Console.WriteLine("Is ArrayList1 equal to ArrayList2? = "+list1.Equals(list2));
list2.RemoveRange(3, 2);
Console.WriteLine("Elements in ArrayList2 after removing elements in a range...");
foreach (string res in list2) {
Console.WriteLine(res);
}
Console.WriteLine("Capacity in ArrayList2 = "+list2.Capacity);
}
}Output
This will produce the following output −
Capacity in ArrayList1 = 5 Elements in ArrayList1... A B C D Capacity in ArrayList2 = 10 Elements in ArrayList2... A B C D E F G H I Is ArrayList1 equal to ArrayList2? = False Elements in ArrayList2 after removing elements in a range... A B C F G H I Capacity in ArrayList2 = 10
Example
Let us see another example −
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args) {
ArrayList list = new ArrayList(5);
list.Add("A");
list.Add("B");
list.Add("C");
list.Add("D");
Console.WriteLine("Capacity in ArrayList = "+list.Capacity);
Console.WriteLine("Count of elements in ArrayList = "+list.Count);
Console.WriteLine("Elements in ArrayList...");
foreach (string res in list) {
Console.WriteLine(res);
}
list.Clear();
Console.WriteLine("Capacity in ArrayList = "+list.Capacity);
Console.WriteLine("Count of elements in ArrayList = "+list.Count);
}
}Output
This will produce the following output −
Capacity in ArrayList = 5 Count of elements in ArrayList = 4 Elements in ArrayList... A B C D Capacity in ArrayList = 5 Count of elements in ArrayList = 0
Updated on: 06-Dec-2019
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