Java C+的多态性与遗传+；

因此，在java中，我有以下实现：

public abstract class PFigure implements Comparable

以及我的继承和多态性的java实现：

public class PFigureList
{
   private final int MAX_VEHICLES = 9;
   private PFigure list[] = new PFigure[MAX_VEHICLES];
   private int count = 0;

   /**
   Adds a PFigure to the list if the list is not full and increments the count.

   @param myFig The "vehicle" PFigure that is going to be added to the list
   */
   public void add(PFigure myFig)
   {
      if(count <= 9)
         list[count++] = myFig;
   }
/**
   For every figure in the list, it calls their hide() function, their 
   polymorphic move() function, and then their draw() function to show where 
   they are now.
   */
   public void move()
   {
      for(int i = 1; i < count; i++)
      {
         list[i].hide();
         list[i].move();
         list[i].draw();
      }
   }

我在这里的目标是获取一个VBot对象，它存储在一个VBotList中，就像我在java中的PFigureList一样。我不知道为什么，但我无法让它在面板上实际显示我的对象。我必须使VBotList的初始化是静态的，以便它不会给我错误消息。我是否遗漏了一些非常明显的东西，或者我只是在显示对象时做了一些不正确的事情？任何关于我的代码的提示、建议或拍手都会很好

---

Show（）基本上只显示图像。如果需要，我将发布代码。

您在C++/CLI中工作，因此您的类也必须进行管理，例如：

ref class Bot
{
public:
    Bot()
    {

    }
};

ref class VBotList
{
private:
    int m_count;
    array<Bot ^> ^vbot;
public:
    VBotList() : m_count(0), vbot(gcnew array<Bot ^>(50))
    {
    }
    void Add(Bot ^newBot)
    {
        vbot[m_count++] = newBot;
    }
    int getCount()
    {
        return m_count;
    }
};

^声明托管指针的句柄

   private: System::Void speedTimer_Tick(System::Object^  sender, System::EventArgs^  e) {
               list->Move();
               Invalidate();
               speedTimer->Interval = speedTrackBar->Value;
            }
private: System::Void vbotAddButton_Click(System::Object^  sender, System::EventArgs^  e) {
            if(comboBox1->SelectedIndex == 1)
            {
               VBot * x = new BillyBot(System::Convert::ToInt32(textBox1->Text), System::Convert::ToInt32(textBox2->Text), panel1);
               list->Add(x);
            }
         }
private: System::Void panel1_Paint(System::Object^  sender, System::Windows::Forms::PaintEventArgs^  e) {
            list->Show();
         }

ref class Bot
{
public:
    Bot()
    {

    }
};

ref class VBotList
{
private:
    int m_count;
    array<Bot ^> ^vbot;
public:
    VBotList() : m_count(0), vbot(gcnew array<Bot ^>(50))
    {
    }
    void Add(Bot ^newBot)
    {
        vbot[m_count++] = newBot;
    }
    int getCount()
    {
        return m_count;
    }
};

private:
    VBotList ^list;

public:
    Form1(void)
    {
        InitializeComponent();
        list = gcnew VBotList();
    label1->Text = System::Convert::ToString(list->getCount());
    }

// ...
private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e)
{
    Bot ^bot = gcnew Bot();
    list->Add(bot);
    label1->Text = System::Convert::ToString(list->getCount());
}