C#自定义集合类和实现索引符c#基础学习
2021-06-08 23:07
标签：running string for cat day 强制 val abstract obj C#自定义集合类和实现索引符c#基础学习 标签：running string for cat day 强制 val abstract obj 原文地址：https://www.cnblogs.com/littlelittleprince/p/10669813.html 1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6
7 using System.Collections;
8
9 namespace day01
10 {
11 class Class25
12 {
13 static void Main(string[] args)
14 {
15 Student list = new Student();
16 Student stu1 = new Student("zhangsan", 23);
17 Student stu2 = new Student("lisi", 24);
18 Student stu3 = new Student("wangwu", 25);
19
20 list.Add(stu1);
21 list.Add(stu2);
22 list.Add(stu3);
23
24
25 foreach(Student temp in list)
26 {
27 Console.WriteLine(temp.ToString());
28 }
29
30 Console.WriteLine();
31 Console.WriteLine(list[2].ToString());
32 Console.ReadKey();
33 }
34 }
35 //自定义集合类和实现索引符
36 public class Student : CollectionBase
37 {
38 private string name;
39 private int age;
40 public string Name { get; set; }
41 public int Age { get; set;}
42 //这两个构造器实现的功能完全不一样 但却放在同一个类中 感觉有问题
43 //无参构造器用于创建集合对象
44 public Student()
45 {
46
47 }
48 //创建Student对象
49 public Student(string name,int age)
50 {
51 Name = name;
52 Age = age;
53 }
54 public override string ToString()
55 {
56 return "name: " + Name + " age: " + Age;
57 }
58 public void Add(Student stu)
59 {
60 List.Add(stu);
61 }
62 public void Remove(Student stu)
63 {
64 List.Remove(stu);
65 }
66 //创建索引符
67 public Student this[int index]
68 {
69 get
70 {
71 return (Student)List[index];
72 }
73 set
74 {
75 List[index] = value;
76 }
77 }
78 }
79 }
代码二 1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6
7 using System.Collections;
8
9 namespace day01
10 {
11 class Class26
12 {
13 static void Main(string[] args)
14 {
15 //这行代码该如何理解 调用的构造函数该怎么理解？
16 Cat catList = new Cat();
17 Cat cat1 = new Cat("zhangsan");
18 Cat cat2 = new Cat("lisi");
19 Cat cat3 = new Cat("wangwu");
20 catList.Add(cat1);
21 catList.Add(cat2);
22 catList.Add(cat3);
23
24 foreach(Cat temp in catList)
25 {
26 Console.WriteLine(temp.ToString());
27 temp.Run();
28 temp.Sleep();
29 }
30 Console.WriteLine();
31
32 Console.WriteLine(catList[2].ToString());
33 catList[2].Run();
34 catList[2].Sleep();
35
36 Console.ReadKey();
37 }
38 }
39 public abstract class Animal : CollectionBase
40 {
41 protected string name;
42 public string Name { get; set; }
43 public Animal()
44 {
45 Name = "default";
46 }
47 public Animal(string name)
48 {
49 Name = name;
50 }
51 public abstract void Run();
52 public abstract void Sleep();
53 public override string ToString()
54 {
55 return "name: " + Name;
56 }
57 public void Add(Animal animal)
58 {
59 List.Add(animal);
60 }
61 public void Remove(Animal animal)
62 {
63 List.Remove(animal);
64 }
65 //注意这行代码
66 //通过索引返回的对象类型为Animal类型 而不是Object类型 不需要再强制类型转换
67 public Animal this[int index]
68 {
69 get
70 {
71 return (Animal)List[index];
72 }
73 set
74 {
75 List[index] = value;
76 }
77 }
78 }
79 public class Cat : Animal
80 {
81 //这个构造器该怎么理解？
82 public Cat()
83 {
84
85 }
86 public Cat(string name):base(name)
87 {
88
89 }
90 public override void Run()
91 {
92 Console.WriteLine("animal name: {0} is running",Name);
93 }
94
95 public override void Sleep()
96 {
97 Console.WriteLine("animal name: {0} is sleeping", Name);
98 }
99 }
100 }
文章标题：C#自定义集合类和实现索引符c#基础学习
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