1类图
2python示例
'''
Created on 2017-2-10
@author: admin
'''
from _overlapped import NULL
from abc import abstractmethod
class AbstractList:
@abstractmethod
def add(self,item):pass
@abstractmethod
def len(self):pass
@abstractmethod
def item(self,index):pass
@abstractmethod
def iterator(self):pass
class MyList(AbstractList):
def __init__(self,data=NULL):
if(data==NULL):
self.data=[];
else:
self.data=data;
def add(self,item):
self.data.append(item)
def len(self):
return len(self.data)
def item(self,index):
return self.data[index]
def iterator(self):
return Iterator(self);
class AbstractIterator:
@abstractmethod
def hasNext(self):pass
@abstractmethod
def next(self):pass
class Iterator(AbstractIterator):
def __init__(self,mylist):
self.list=mylist;
self.index=0;
def hasNext(self):
if self.index>=self.list.len():
return False
else:
return True
def next(self):
if self.hasNext():
data=self.list.item(self.index);
self.index+=1;
return data;
else:
raise Exception("index out of bound")
if __name__ == '__main__':
mylist=MyList([1,2,3,4,5,6,7,8,9]);
it=mylist.iterator();
while it.hasNext():
print(it.next(),end=",");