泛型学习(三)

5 泛型与继承

开放类型:含有类型参数的类型,“开放”即为 数据类型不确定。
          (包括:类型参数本身,包含开放类型的构造类型,元素类型为开放类型的数组类型)
封闭类型:开放类型以外的类型 (即没有泛型类型的值类型 引用类型)

* 基本原则: 开放类型不能从封闭类型中继承。

5.1 普通类型与派生泛型类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApp
{
    class GenericInheritSample
    {
        public static void Main()
        {
            CzIndexedAssemble<Contact> asm = new CzIndexedAssemble<Contact>(5);
            asm[0] = new Contact("赵丽");
            asm[1] = new Business("Mike");
            asm[2] = new Business("李明");
            asm[3] = new Business("Tom");
            asm[4] = new Family("王小强");
            asm.Sort();

            for (int i = 0; i < 5; i++)
                asm[i].Output();
            Console .WriteLine ("---------------------------")
            asm.Output ();
            Console .ReadLine ();
        }
    }

    //泛型类:索引集合CzIndexedAssemble
    public class CzIndexedAssemble<T> : czrelation<int, T> where T : IComparable
    {
        public T this[int index]
        {
            get { return Right[index]; }
            set { Right[index] = value; }
        }

        public CzIndexedAssemble(int iLength) : base(iLength)
        {
            for (int i = 0; i < Length; i++)
                Left[i] = i;
        }

        public void Output()
        {
            T t;
            for (int i = 0; i < Length; i++)
            {
                t = Right[Left[i]];
                if (t != null)
                {
                    IOutput io = t as IOutput;
                    if (io != null)
                        io.Output();
                    else
                        Console.WriteLine(t);
                }
            }
        }

        public void Sort()
        {
            int tmp;
            for (int i = Length; i > 0; i--)
            {
                for (int j = 0; j < i - 1; j++)
                {
                    if (Right[Left[j]].CompareTo(Right[Left[j + 1]]) > 0)
                    {
                        tmp = Left[j + 1];
                        Left[j + 1] = Left[j];
                        Left[j] = tmp;
                    }
                }
            }
        }
    }
}

 

posted @ 2012-12-10 01:54  streetpasser  阅读(172)  评论(0编辑  收藏  举报