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Legal Studies在 C# 中獲取 ArrayList 實際包含的元素數
若要獲得 ArrayList 中實際包含的元素數，程式碼如下 -
示例
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args){
ArrayList list1 = new ArrayList();
list1.Add("A");
list1.Add("B");
list1.Add("C");
list1.Add("D");
list1.Add("E");
list1.Add("F");
list1.Add("G");
list1.Add("H");
list1.Add("I");
Console.WriteLine("Elements in ArrayList1...");
foreach (string res in list1){
Console.WriteLine(res);
}
ArrayList list2 = new ArrayList();
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("Elements in ArrayList2...");
foreach (string res in list2){
Console.WriteLine(res);
}
ArrayList list3 = new ArrayList();
Console.WriteLine("Current capacity of ArrayList3: " + list3.Capacity);
list3 = list2;
Console.WriteLine("Current capacity of ArrayList3 (Updated) " + list3.Capacity);
Console.WriteLine("Is ArrayList3 equal to ArrayList2? = "+list3.Equals(list2));
Console.WriteLine("Count of elements in ArrayList2 = " + list2.Count);
list2.Clear();
Console.WriteLine("Count of elements in ArrayList2 (Updated) = " + list2.Count);
}
}輸出
這將生成以下輸出 -
Elements in ArrayList1... A B C D E F G H I Elements in ArrayList2... A B C D E F G H I Current capacity of ArrayList3: 0 Current capacity of ArrayList3: 16 Is ArrayList3 equal to ArrayList2? = True Count of elements in ArrayList2 = 9 Count of elements in ArrayList2 (Updated) = 0
示例
我們再來看一個示例 -
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args){
ArrayList list1 = new ArrayList();
list1.Add("A");
list1.Add("B");
list1.Add("C");
list1.Add("D");
list1.Add("E");
list1.Add("F");
list1.Add("G");
list1.Add("H");
list1.Add("I");
Console.WriteLine("Current capacity of ArrayList1: " + list1.Capacity);
Console.WriteLine("Elements in ArrayList1...");
foreach (string res in list1){
Console.WriteLine(res);
}
ArrayList list2 = new ArrayList();
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("Elements in ArrayList2...");
foreach (string res in list2){
Console.WriteLine(res);
}
ArrayList list3 = new ArrayList();
list3 = list2;
Console.WriteLine("Is ArrayList3 equal to ArrayList2? = "+list3.Equals(list2));
}
}輸出
這將生成以下輸出 -
Current capacity of ArrayList1: 16 Elements in ArrayList1... A B C D E F G H I Elements in ArrayList2... A B C D E F G H I Is ArrayList3 equal to ArrayList2? = True
更新於： 2019 年 12 月 6 日
67 次瀏覽
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