Abstract (抽象类、接口、重写、覆写、重载)-白红宇

Abstract (抽象类、接口、重写、覆写、重载)

阅读量：6591 次

发布时间：2019-06-24

本文共 11664 字，大约阅读时间需要 38 分钟。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract.Abstract{    ///     /// 抽象类是一个类，里面可以包含一切类可以包含的    /// 抽象成员 必须包含在抽象类里面，抽象类还可以包含普通成员    /// 继承抽象类后，必须显示的override其抽象成员    /// 抽象类不能直接实例化，声明的对象只能使用抽象类里的方法，不能用子类新增的方法    /// 父类只有一个    /// is a    /// 
    public abstract class BasePhone    {        public int Id { get; set; }        public string Name = "123";        public delegate void DoNothing();        public event DoNothing DoNothingEvent;        public void Show()        {            Console.WriteLine("这里是Show1");        }        public virtual void ShowVirtual()        {            Console.WriteLine("这里是Show");        }        ///         /// 品牌        /// 
        /// 
             public abstract string Brand();        ///         /// 系统        /// 
        /// 
             public abstract string System();        ///         /// 打电话        /// 
        public abstract void Call();        ///         /// 拍照        /// 
        public abstract void Photo();        public abstract void Do
     
      ();    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract.Abstract{    ///     /// 接口不是类，里面可以包含属性、方法、事件   不能包含字段，委托，不能用访问修饰符    /// 接口只能包含没有实现的方法    /// 实现接口的话，必须实现全部方法    /// 接口不能直接实例化，声明的对象只能使用接口里的方法，不能用子类新增的方法    /// 接口可以实现多个    /// can do    /// 
    public interface IExtend    {        //event Action DoNothingEvent;        //int Id { get; set; }        void Game();        //List<>    }    public interface IPay    {        void Pay();    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract.Abstract{    public class iPad : IExtend, IPay    //: BasePhone    {        public void Game()        {            throw new NotImplementedException();        }        public void Pay()        {            throw new NotImplementedException();        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract.Abstract{    ///     /// 手机    /// 
    public class iPhone : BasePhone, IExtend, IPay    {        ///         /// 品牌        /// 
        /// 
             public override string Brand()        {            return "iPhone";        }        ///         /// 系统        /// 
        /// 
             public override string System()        {            return "IOS";        }        ///         /// 打电话        /// 
        public override void Call()        {            Console.WriteLine("User{0} {1} {2} Call", this.GetType().Name, this.Brand(), this.System());        }        ///         /// 拍照        /// 
        public override void Photo()        {            Console.WriteLine("User{0} {1} {2} Call", this.GetType().Name, this.Brand(), this.System());        }        public override void Do
     
      ()        {        }        public void Game()        {            throw new NotImplementedException();        }        public void Pay()        {            throw new NotImplementedException();        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract.Abstract{    ///     /// 手机    /// 
    public class Lumia : BasePhone,IExtend    {        ///         /// 品牌        /// 
        /// 
             public override string Brand()        {            return "Nokia";        }        ///         /// 系统        /// 
        /// 
             public override string System()        {            return "Winphone";        }        ///         /// 打电话        /// 
        public override void Call()        {            Console.WriteLine("User{0} {1} {2} Call", this.GetType().Name, this.Brand(), this.System());        }        ///         /// 拍照        /// 
        public override void Photo()        {            Console.WriteLine("User{0} {1} {2} Call", this.GetType().Name, this.Brand(), this.System());        }        public void Metro()        {            Console.WriteLine("This is Metro");        }        public override void Do
     
      ()        {        }        public void Game()        {            throw new NotImplementedException();        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract.Abstract{    ///     /// 手机    /// 
    public class Mi : BasePhone    {        ///         /// 品牌        /// 
        /// 
             public override string Brand()        {            return "XiaoMi";        }        ///         /// 系统        /// 
        /// 
             public override string System()        {            return "Android";        }        ///         /// 打电话        /// 
        public override void Call()        {            Console.WriteLine("User{0} {1} {2} Call", this.GetType().Name, this.Brand(), this.System());        }        ///         /// 拍照        /// 
        public override void Photo()        {            Console.WriteLine("User{0} {1} {2} Photo", this.GetType().Name, this.Brand(), this.System());        }        public override void Do
     
      ()        {        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract.Polymorphism{    ///     /// 普通方法是由编译时决定的    ///   虚方法是由运行时决定的    /// 
    public class Poly    {        public static void Test()        {            Console.WriteLine("*******************************************");            Console.WriteLine("*******************************************");            Console.WriteLine("*******************************************");            ParentClass instance = new ChildClass();            Console.WriteLine("下面是instance.CommonMethod()");            instance.CommonMethod();            Console.WriteLine("下面是instance.VirtualMethod()");            instance.VirtualMethod();            Console.WriteLine("下面是instance.AbstractMethod()");            instance.AbstractMethod();            Console.WriteLine("*******************************************");            Console.WriteLine("*******************************************");            Console.WriteLine("*******************************************");        }    }    #region abstract    public abstract class ParentClass    {        ///         /// CommonMethod        /// 
        public void CommonMethod()        {            Console.WriteLine("ParentClass CommonMethod");        }        ///         /// virtual  虚方法  必须包含实现 但是可以被重载        /// 
        public virtual void VirtualMethod()        {            Console.WriteLine("ParentClass VirtualMethod");        }        public virtual void VirtualMethod(string name)        {            Console.WriteLine("ParentClass VirtualMethod");        }        //public override bool Equals(object obj)        //{        //    return base.Equals(obj);        //}        public abstract void AbstractMethod();    }    public class ChildClass : ParentClass    {        ///         /// new 隐藏        /// 
        public new void CommonMethod()        {            Console.WriteLine("ChildClass CommonMethod");        }        public void CommonMethod(string name)        {            Console.WriteLine("ChildClass CommonMethod");        }        //public void CommonMethod(int id)        //{        //    Console.WriteLine("ChildClass CommonMethod");        //}        //public void CommonMethod(int id, string name)        //{        //    Console.WriteLine("ChildClass CommonMethod");        //}        public void CommonMethod(int id, string name = "", string des = "", int size = 0)        {            Console.WriteLine("ChildClass CommonMethod");        }        public void CommonMethod(string name, int id)        {            Console.WriteLine("ChildClass CommonMethod");        }        ///         /// virtual 可以被覆写        /// 
        ///         /// 
             public override void VirtualMethod()        {            Console.WriteLine("ChildClass VirtualMethod");            base.VirtualMethod();        }        public sealed override void AbstractMethod()        {            Console.WriteLine("ChildClass AbstractMethod");        }    }    public class GrandClass : ChildClass    {        //public override void AbstractMethod()        //{        //    base.AbstractMethod();        //}        public override void VirtualMethod()        {            base.VirtualMethod();        }    }    #endregion abstract}

using MyAbstract.Abstract;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract{    ///     /// 1 作业讲解    /// 2 封装继承多态    /// 3 抽象类接口    /// 4 重写overwrite(new)  覆写override 重载overload(方法)     /// 
    class Program    {        static void Main(string[] args)        {            try            {                Console.WriteLine("欢迎来到.net高级班vip课程，今天是Eleven老师为大家带来的接口抽象类课程");                Student student = new Student()                {                    Id = 423,                    Name = "假洒脱"                };                {                    BasePhone phone = new Lumia();                    //student.PlayLumia(phone);                    student.PlayPhone(phone);                }                {                    //BasePhone phone = new BasePhone();                    //BasePhone phone = new Lumia();                    //phone.Metro();                    IExtend phone = new iPhone();                    //IExtend phone = new IExtend();                    //phone.Call();                }                {                    BasePhone phone = new iPhone();                    phone.Call();                    //student.PlayIPhone(phone);                    student.PlayPhone(phone);                }                Polymorphism.Poly.Test();            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);            }            Console.Read();        }    }}

using MyAbstract.Abstract;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace MyAbstract{    public class People    {        public int Id { get; set; }        public string Name { get; set; }    }    public class Student : People    {        private int Tall { get; set; }        //public void Play
     
      (T t) where T:        //{        //    Console.WriteLine("This is {0} play {1}", this.Name, lumia.GetType());        //    t.Brand();        //    t.Call();        //    t.Photo();        //}        public void PlayPhone(BasePhone phone)        {            Console.WriteLine("This is {0} play {1}", this.Name, phone.GetType());            phone.Brand();            phone.Call();            phone.Photo();        }        public void PlayLumia(Lumia lumia)        {            Console.WriteLine("This is {0} play {1}", this.Name, lumia.GetType());            lumia.Brand();            lumia.Call();            lumia.Photo();        }        public void PlayIPhone(iPhone lumia)        {            Console.WriteLine("This is {0} play {1}", this.Name, lumia.GetType());            lumia.Brand();            lumia.Call();            lumia.Photo();        }            }    public class Teacher : People    {        private int Tall { get; set; }        public void PlayLumia(Lumia lumia)        {            Console.WriteLine("This is {0} play {1}", this.Name, lumia.GetType());            lumia.Brand();            lumia.Call();            lumia.Photo();        }    }}

转载于:https://www.cnblogs.com/zhengqian/p/8493256.html

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