G.C.とは？ わかりやすく解説

Public NotInheritable Class
 GC

静的クラスのメンバは、クラスのインスタンスなしに直接アクセスされます。

public static class GC

public ref class GC abstract sealed

public final class GC

public final class GC

Imports System

Namespace GCCollectInt_Example
    Class MyGCCollectClass
        Private maxGarbage As Long
 = 10000

        Public Shared Sub
 Main()
            Dim myGCCol As New
 MyGCCollectClass

            'Determine the maximum number of generations the system
            'garbage collector currently supports.
            Console.WriteLine("The highest generation is {0}",
 GC.MaxGeneration)

            myGCCol.MakeSomeGarbage()

            'Determine which generation myGCCol object is stored in.
            Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol))

            'Determine the best available approximation of the number
 
            'of bytes currently allocated in managed memory.
            Console.WriteLine("Total Memory: {0}",
 GC.GetTotalMemory(False))

            'Perform a collection of generation 0 only.
            GC.Collect(0)

            'Determine which generation myGCCol object is stored in.
            Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol))

            Console.WriteLine("Total Memory: {0}",
 GC.GetTotalMemory(False))

            'Perform a collection of all generations up to and including
 2.
            GC.Collect(2)

            'Determine which generation myGCCol object is stored in.
            Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol))
            Console.WriteLine("Total Memory: {0}",
 GC.GetTotalMemory(False))
            Console.Read()

        End Sub


        Sub MakeSomeGarbage()
            Dim vt As Version

            Dim i As Integer
            For i = 0 To maxGarbage - 1
                'Create objects and release them to fill up memory
                'with unused objects.
                vt = New Version
            Next i
        End Sub
    End Class
End Namespace

using System;

namespace GCCollectIntExample
{
    class MyGCCollectClass
    {
        private const long maxGarbage = 1000;
      
        static void Main()
        {
            MyGCCollectClass myGCCol = new MyGCCollectClass();

            // Determine the maximum number of generations the system
        // garbage collector currently supports.
            Console.WriteLine("The highest generation is {0}", GC.MaxGeneration);
            
            myGCCol.MakeSomeGarbage();

            // Determine which generation myGCCol object is stored in.
            Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol));
            
            // Determine the best available approximation of the number
 
        // of bytes currently allocated in managed memory.
            Console.WriteLine("Total Memory: {0}", GC.GetTotalMemory(false));
            
            // Perform a collection of generation 0 only.
            GC.Collect(0);
            
            // Determine which generation myGCCol object is stored in.
            Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol));
            
            Console.WriteLine("Total Memory: {0}", GC.GetTotalMemory(false));
            
            // Perform a collection of all generations up to and including
 2.
            GC.Collect(2);
            
            // Determine which generation myGCCol object is stored in.
            Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol));
            Console.WriteLine("Total Memory: {0}", GC.GetTotalMemory(false));
            Console.Read();
        }

        void MakeSomeGarbage()
        {
            Version vt;

            for(int i = 0; i < maxGarbage;
 i++)
            {
                // Create objects and release them to fill up memory
        // with unused objects.
                vt = new Version();
            }
        }
    }
}

using namespace System;
const long maxGarbage = 1000;
ref class MyGCCollectClass
{
public:
   void MakeSomeGarbage()
   {
      Version^ vt;
      for ( int i = 0; i < maxGarbage; i++
 )
      {
         
         // Create objects and release them to fill up memory
         // with unused objects.
         vt = gcnew Version;

      }
   }

};

int main()
{
   MyGCCollectClass^ myGCCol = gcnew MyGCCollectClass;
   
   // Determine the maximum number of generations the system
   // garbage collector currently supports.
   Console::WriteLine( "The highest generation is {0}", GC::MaxGeneration
 );
   myGCCol->MakeSomeGarbage();
   
   // Determine which generation myGCCol object is stored in.
   Console::WriteLine( "Generation: {0}", GC::GetGeneration( myGCCol )
 );
   
   // Determine the best available approximation of the number
   // of bytes currently allocated in managed memory.
   Console::WriteLine( "Total Memory: {0}", GC::GetTotalMemory( false
 ) );
   
   // Perform a collection of generation 0 only.
   GC::Collect( 0 );
   
   // Determine which generation myGCCol object is stored in.
   Console::WriteLine( "Generation: {0}", GC::GetGeneration( myGCCol )
 );
   Console::WriteLine( "Total Memory: {0}", GC::GetTotalMemory( false
 ) );
   
   // Perform a collection of all generations up to and including 2.
   GC::Collect( 2 );
   
   // Determine which generation myGCCol object is stored in.
   Console::WriteLine( "Generation: {0}", GC::GetGeneration( myGCCol )
 );
   Console::WriteLine( "Total Memory: {0}", GC::GetTotalMemory( false
 ) );
}

package GCCollectIntExample; 

import System.* ;

class MyGCCollectClass
{
    private static final long maxGarbage =
 1000;

    public static void main(String[]
 args)
    {
        MyGCCollectClass myGCCol = new MyGCCollectClass();

        // Determine the maximum number of generations the system
        // garbage collector currently supports.
        Console.WriteLine("The highest generation is {0}", 
            System.Convert.ToString(GC.get_MaxGeneration()));
        myGCCol.MakeSomeGarbage();

        // Determine which generation myGCCol object is stored in.
        Console.WriteLine("Generation: {0}", 
            System.Convert.ToString(GC.GetGeneration(myGCCol)));

        // Determine the best available approximation of the number
 
        // of bytes currently allocated in managed memory.
        Console.WriteLine("Total Memory: {0}", 
            System.Convert.ToString(GC.GetTotalMemory(false)));

        // Perform a collection of generation 0 only.
        GC.Collect(0);

        // Determine which generation myGCCol object is stored in.
        Console.WriteLine("Generation: {0}", 
            System.Convert.ToString(GC.GetGeneration(myGCCol)));
        Console.WriteLine("Total Memory: {0}", 
            System.Convert.ToString(GC.GetTotalMemory(false)));

        // Perform a collection of all generations up to and including
 2.
        GC.Collect(2);

        // Determine which generation myGCCol object is stored in.
        Console.WriteLine("Generation: {0}", 
            System.Convert.ToString(GC.GetGeneration(myGCCol)));
        Console.WriteLine("Total Memory: {0}", 
            System.Convert.ToString(GC.GetTotalMemory(false)));
        Console.Read();
    } //main

    void MakeSomeGarbage()
    {
        Version vt;

        for (int i = 0; i < maxGarbage;
 i++) {
            // Create objects and release them to fill up memory
            // with unused objects.
            vt = new Version();
        }
    } //MakeSomeGarbage
} //MyGCCollectClass