欲构造ArrayList类的一个实例,此类继承了List接口,下列()方法是正确的。A.ArrayList myList=new O
欲构造ArrayList类的一个实例,此类继承了List接口,下列()方法是正确的。
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();
欲构造ArrayList类的一个实例,此类继承了List接口,下列()方法是正确的。
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.myList=new List();
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();
A.ArrayListmyList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();
A.ArrayList myLis=new Object():
B.List myList--new ArrayList():
C.ArrayList myList=new List();
D.myList=new List();
A.ArrayList myList = new Object();
B.List myList = new ArrayList();
C.ArrayList myList = new List();
D.List myList = new List();
A.ArrayList myList = new Object();
B.List myList = new ArrayList();
C.ArrayList myList = new List();
D.List myList = new List();
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();
A.ArrayListmyList=newObject();
B.ListmyList=newArrayList();
C.ArrayListmyList=newList();
D.ListmyList=newList();
A.接口之间不能有继承关系
B.一个类不可实现多个接口
C.接口与抽象类是相同的概念
D.实现一个接口必须实现接口的所有方法