в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:14:47Z

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==A derived class can add its own type parameters==

<source lang="csharp">using System;

class Gen<T> {
T ob;

public Gen(T o) {
ob = o;
}

public T getob() {
return ob;
}
}

class Gen2<T, V> : Gen<T> {
V ob2;

public Gen2(T o, V o2) : base(o) {
ob2 = o2;
}

public V getob2() {
return ob2;
}
}

class MainClass {
public static void Main() {

Gen2<string, int> x = new Gen2<string, int>("Value is: ", 99);

Console.Write(x.getob());
Console.WriteLine(x.getob2());
}
}</source>
<pre class=codeResult>Value is: 99</pre>

==A nongeneric class can be the base class of a generic derived class==

<source lang="csharp">using System;

class NonGen {
int num;

public NonGen(int i) {
num = i;
}

public int getnum() {
return num;
}
}

class Gen<T> : NonGen {
T ob;

public Gen(T o, int i) : base (i) {
ob = o;
}

public T getob() {
return ob;
}
}

class MainClass {
public static void Main() {
Gen<String> w = new Gen<String>("Hello", 4);

Console.Write(w.getob() + " ");
Console.WriteLine(w.getnum());
}
}</source>
<pre class=codeResult>Hello 4</pre>

==A simple generic class hierarchy==

<source lang="csharp">using System;

class Gen<T> {
T ob;

public Gen(T o) {
ob = o;
}

public T getob() {
return ob;
}
}

class Gen2<T> : Gen<T> {
public Gen2(T o) : base(o) {
}
}

class MainClass {
public static void Main() {
Gen2<string> g2 = new Gen2<string>("Hello");

Console.WriteLine(g2.getob());
}
}</source>
<pre class=codeResult>Hello</pre>

==Overriding a virtual method in a generic class==

<source lang="csharp">using System;

class Gen<T> {
protected T ob;

public Gen(T o) {
ob = o;
}

public virtual T getob() {
Console.Write("Gen"s getob(): " );
return ob;
}
}

class Gen2<T> : Gen<T> {

public Gen2(T o) : base(o) { }

public override T getob() {
Console.Write("Gen2"s getob(): ");
return ob;
}
}

class MainClass {
public static void Main() {
Gen<int> iOb = new Gen<int>(88);

Console.WriteLine(iOb.getob());

iOb = new Gen2<int>(99);

Console.WriteLine(iOb.getob());
}
}</source>
<pre class=codeResult>Gen"s getob(): 88
Gen2"s getob(): 99</pre>

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в 15:31, 26 мая 2010

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