//---------------override--------------------
public override void AttachKey(object _obj)
{
if(!IsEmpty())
throw new Exception("My:this node must be a empty tree node!");
this.key=_obj;
//产生一个degree长的数组,并将其初始化为空树
this.treeList=new ArrayList();
this.treeList.Capacity=(int)this.degree;
for(int i=0;i<this.degree;i++)
{
treeList.Add(new AVLTree());
}
//
this.height=0;
}