static void Main(string[] args)
{
ConcreteAggegate <string> aggegate = new ConcreteAggegate <string>();
aggegate[0] = "小明";
aggegate[1] = "小红";
aggegate[2] = "小丁";
aggegate[3] = "小白";
//顺序读取
Iterator iterator = new ConcreteIterator <string>(aggegate);
Console.WriteLine("顺序读取");
while (iterator.MoveNext())
{
Console.WriteLine(iterator.CuurentItem());
}
iterator = new ConcreteIteratorDesc <string>(aggegate);
//逆序读取
Console.WriteLine("逆序读取");
while (iterator.MoveNext())
{
Console.WriteLine(iterator.CuurentItem());
}
Console.ReadKey();
}
public ConcreteIteratorDesc(ConcreteAggegate <T> aggegate)
{
this._aggegate = aggegate;
this.count = aggegate.Count > 0?aggegate.Count:-1;
}
public ConcreteIterator(ConcreteAggegate <T> aggegate)
{
this._aggegate = aggegate;
}