浅谈c# 泛型类的应用

class BaseNode { }
class BaseNodeGeneric<T> { }
// 继承具体类
class NodeConcrete<T> : BaseNode { }
//继承封闭式构造基类
//封闭式构造基类指基类类型参数指定具体类型
class NodeClosed<T> : BaseNodeGeneric<int> { }
//继承开放式构造基类
//开放式构造基类指基类类型参数未指定
class NodeOpen<T> : BaseNodeGeneric<T> { }

//正确
class Node1 : BaseNodeGeneric<int> { }
//错误
//在子类中未指定父类类型参数实现
class Node2 : BaseNodeGeneric<T> {}
//错误
//在子类中未指定父类类型参数实现
class Node3 : T {}
class BaseNodeMultiple<T, U> { }
//正确
class Node4<T> : BaseNodeMultiple<T, int> { }
//正确
class Node5<T, U> : BaseNodeMultiple<T, U> { }
//错误
//在子类中未指定父类类型参数实现
class Node6<T> : BaseNodeMultiple<T, U> {}

class NodeItem<T> where T : System.IComparable<T>, new() { }
class SpecialNodeItem<T> : NodeItem<T> where T : System.IComparable<T>, new() { }

class SuperKeyType<K, V, U>
    where U : System.IComparable<U>
    where V : new()
{ }

void Swap<T>(List<T> list1, List<T> list2)
{ }
void Swap(List<int> list1, List<int> list2)
{ }

class Stack<T> where T : System.IComparable<T>, IEnumerable<T>
{
}

interface IDictionary<K, V>
{
}

class GenericInterface
    {
        static void Main()
        {
            SortedList<Person> list = new SortedList<Person>();
            string[] names = new string[]
            {
                "zhang san",
                "li si",
                "wang wu",
                "zhou er",
                "he yi"
            };
            int[] ages = new int[] { 22, 15, 30, 34, 12 };
            for (int x = 0; x < 5; x++)
            {
                list.AddNode(new Person(names[x], ages[x]));
            }
            foreach (Person p in list)
            {
                System.Console.WriteLine(p.ToString());
            }
            Console.WriteLine("------------------排序-----------------------");
            list.BublleSort();
            foreach (Person p in list)
            {
                System.Console.WriteLine(p.ToString());
            }
            Console.Read();
        }
    }
    public class GenericList<T> : System.Collections.Generic.IEnumerable<T>
    {
        public class Node
        {
            private T data;
            public T Data
            {
                get { return data; }
                set { data = value; }
            }
            private Node next;
            public Node Next
            {
                get { return next; }
                set { next = value; }
            }
            private Node last;
            public Node Last
            {
                get { return last; }
                set { last = value; }
            }
            public Node(T t)
            {
                data = t;
                next = null;
            }
        }
        public Node firstNode;
        private Node lastNode;
        public void AddNode(T t)
        {
            Node node = new Node(t);
            node.Last = lastNode;
            if (lastNode != null)
                lastNode.Next = node;
            lastNode = node;
            if (firstNode == null)
                firstNode = node;
        }
        #region IEnumerable<T> 成员
        public IEnumerator<T> GetEnumerator()
        {
            Node current = firstNode;
            while (current != null)
            {
                //yield return表达式以枚举对象返回
                yield return current.Data;
                current = current.Next;
            }
        }
        #endregion
        #region IEnumerable 成员
         //IEnumerable < T >继承自IEnumerable,
        //因此这类必须实现泛型和非泛型的版本的GetEnumerator。
        //在大多数情况下,非泛型方法简单调用泛型方法。
        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();
        }
        #endregion
    }
    public class SortedList<T> : GenericList<T> where T : System.IComparable<T>
    {
        //该方法实现排序
        public void BublleSort()
        {
            if (firstNode == null || firstNode.Next == null)
                return;
            bool swapped;
            do
            {
                Node last = null;
                Node current = firstNode;
                swapped = false;
                while (current.Next != null)
                {
                    if (current.Data.CompareTo(current.Next.Data) > 0)
                    {
                        /* 当前节点大于下一个节点，位置交换*/
                        Node tmp = current.Next;
                        current.Next = current.Next.Next;
                        tmp.Next = current;
                        if (last == null)
                        {
                            firstNode = tmp;
                        }
                        else
                        {
                            last.Next = tmp;
                        }
                        last = tmp;
                        swapped = true;
                    }
                    else
                    {
                        last = current;
                        current = current.Next;
                    }
                }
            }
            while (swapped);
        }
    }
    public class Person : System.IComparable<Person>
    {
        string name;
        int age;
        public Person(string n, int a)
        {
            name = n;
            age = a;
        }
        #region IComparable<Person> 成员
        public int CompareTo(Person p)
        {
            //按年龄排序
            //return age - p.age;
            //按名称排序
            int a =name.CompareTo(p.name);
            return a;
        }
        #endregion
        public override string ToString()
        {
            return name + ":" + age;
        }
    }

class GenericList<T>
{
    // CS0693
    void SampleMethod<T>() { }
}

void DoWork() { }
void DoWork<T>() { }
void DoWork<T, U>() { }