public static ChessmanFactory getInstance()
{
if (instance == null)
{
instance = new ChessmanFactory();
}
return(instance);
}
public static ChessmanFactory getInstance()
{
if (instance == null)
{
instance = new ChessmanFactory();
}
return instance;
}
static void Main(string[] args)
{
Console.WriteLine("享元模式：运用共享技术有效的支持大量细粒度对象的复用。系统只使用少量的对象，而这些对象都很相似，状态变化很小，可以实现对象的多次复用。由于享元模式要求能够共享的对象必须是细粒度对象，因此它又成为轻量级模式，它是一种对象结构模型。");
Chessman b1, b2, w1, w2;
ChessmanFactory factory = ChessmanFactory.getInstance();
b1 = factory.getChessman("b");
b2 = factory.getChessman("b");
Console.WriteLine("--" + (b1 == b2));
w1 = factory.getChessman("w");
w2 = factory.getChessman("w");
Console.WriteLine("--" + (w1 == w2));
b1.display(new Coordinates(1, 1));
b2.display(new Coordinates(1, 2));
w1.display(new Coordinates(2, 1));
w2.display(new Coordinates(2, 2));
Console.ReadLine();
}