C# 泛型

泛型类

using System;
using System.Collections.Generic;

namespace GenericApplication
{
    public class MyGenericArray<T>
    {
        private T[] array;
        public MyGenericArray(int size)
        {
            array = new T[size + 1];
        }
        public T getItem(int index)
        {
            return array[index];
        }
        public void setItem(int index, T value)
        {
            array[index] = value;
        }
    }
           
    class Tester
    {
        static void Main(string[] args)
        {
            // 声明一个整型数组
            MyGenericArray<int> intArray = new MyGenericArray<int>(5);
            // 设置值
            for (int c = 0; c < 5; c++)
            {
                intArray.setItem(c, c*5);
            }
            // 获取值
            for (int c = 0; c < 5; c++)
            {
                Console.Write(intArray.getItem(c) + " ");
            }
            Console.WriteLine();
            // 声明一个字符数组
            MyGenericArray<char> charArray = new MyGenericArray<char>(5);
            // 设置值
            for (int c = 0; c < 5; c++)
            {
                charArray.setItem(c, (char)(c+97));
            }
            // 获取值
            for (int c = 0; c < 5; c++)
            {
                Console.Write(charArray.getItem(c) + " ");
            }
            Console.WriteLine();
            Console.ReadKey();
        }
    }
}

泛型方法

using System;
using System.Collections.Generic;

namespace GenericMethodAppl
{
    class Program
    {
        static void Swap<T>(ref T lhs, ref T rhs)
        {
            T temp;
            temp = lhs;
            lhs = rhs;
            rhs = temp;
        }
        static void Main(string[] args)
        {
            int a, b;
            char c, d;
            a = 10;
            b = 20;
            c = 'I';
            d = 'V';

            // 在交换之前显示值
            Console.WriteLine("Int values before calling swap:");
            Console.WriteLine("a = {0}, b = {1}", a, b);
            Console.WriteLine("Char values before calling swap:");
            Console.WriteLine("c = {0}, d = {1}", c, d);

            // 调用 swap
            Swap<int>(ref a, ref b);
            Swap<char>(ref c, ref d);

            // 在交换之后显示值
            Console.WriteLine("Int values after calling swap:");
            Console.WriteLine("a = {0}, b = {1}", a, b);
            Console.WriteLine("Char values after calling swap:");
            Console.WriteLine("c = {0}, d = {1}", c, d);
            Console.ReadKey();
        }
    }
}